:: Processes in {P}etri nets
:: by Grzegorz Bancerek , Mitsuru Aoki , Akio Matsumoto and Yasunari Shidama
::
:: Received December 20, 2002
:: Copyright (c) 2002-2018 Association of Mizar Users
:: (Stowarzyszenie Uzytkownikow Mizara, Bialystok, Poland).
:: This code can be distributed under the GNU General Public Licence
:: version 3.0 or later, or the Creative Commons Attribution-ShareAlike
:: License version 3.0 or later, subject to the binding interpretation
:: detailed in file COPYING.interpretation.
:: See COPYING.GPL and COPYING.CC-BY-SA for the full text of these
:: licenses, or see http://www.gnu.org/licenses/gpl.html and
:: http://creativecommons.org/licenses/by-sa/3.0/.
environ
vocabularies NUMBERS, SUBSET_1, XXREAL_0, CARD_1, FINSEQ_1, RELAT_1, TARSKI,
XBOOLE_0, NAT_1, ARYTM_3, FUNCT_1, FUNCOP_1, ARYTM_1, PETRI, NET_1,
MCART_1, FUNCT_2, FUNCT_7, PARTFUN1, ORDINAL4, VALUED_1, PNPROC_1;
notations TARSKI, XBOOLE_0, DOMAIN_1, XTUPLE_0, RELAT_1, FUNCT_1, SUBSET_1,
PARTFUN1, CARD_1, FINSEQ_1, FUNCT_2, FUNCOP_1, ORDINAL1, NUMBERS,
XCMPLX_0, NAT_1, NAT_D, MCART_1, FINSEQ_2, FUNCT_7, INT_1, XXREAL_0,
PRE_POLY, VALUED_1;
constructors WELLORD2, DOMAIN_1, REAL_1, FUNCT_7, NAT_D, RELSET_1, PRE_POLY,
XTUPLE_0, FINSEQ_6;
registrations XBOOLE_0, RELAT_1, FUNCT_1, ORDINAL1, XREAL_0, FINSEQ_1,
FUNCT_7, FINSEQ_6, VALUED_0, VALUED_1, FUNCT_2, MEMBERED, CARD_1, NAT_1,
XTUPLE_0;
requirements BOOLE, SUBSET, REAL, NUMERALS, ARITHM;
definitions TARSKI, XBOOLE_0, FUNCOP_1;
equalities TARSKI;
expansions TARSKI, XBOOLE_0;
theorems TARSKI, NAT_1, FUNCT_1, FUNCT_2, RELSET_1, FUNCOP_1, XBOOLE_1,
RELAT_1, INT_1, FINSEQ_1, FUNCT_7, XBOOLE_0, TREES_2, FINSEQ_3, ENUMSET1,
ZFMISC_1, GRFUNC_1, FINSEQ_6, XREAL_1, XXREAL_0, ORDINAL1,
PARTFUN1, VALUED_1, XTUPLE_0;
schemes NAT_1, FUNCT_1, FINSEQ_1, CLASSES1;
begin :: Markings on Petri nets
reserve i,j,k,l for Nat,
x,x1,x2,y1,y2 for set;
definition
let P be set;
mode marking of P is Function of P,NAT;
end;
reserve P,p,x,y,x1,x2 for set,
m1,m2,m3,m4,m for marking of P,
i,j,j1,j2,k,k1,k2,l,l1 for Nat;
notation
let P be set;
let m be marking of P;
let p be object;
synonym m multitude_of p for m.p;
end;
scheme MarkingLambda { P() -> set, F(object) -> Element of NAT }:
ex m being Function of P(),NAT st
for p st p in P() holds m.p = F(p)
proof
consider m being Function such that
A1: dom m = P() and
A2: for p being object st p in P() holds m.p = F(p) from FUNCT_1:sch 3;
rng m c= NAT
proof
let y be object;
assume y in rng m;
then consider x being object such that
A3: x in dom m and
A4: y = m.x by FUNCT_1:def 3;
y = F(x) by A1,A2,A3,A4;
hence thesis;
end;
then reconsider m as marking of P() by A1,FUNCT_2:67,RELSET_1:4;
take m;
thus thesis by A2;
end;
definition
let P,m1,m2;
redefine pred m1 = m2 means
for p being object st p in P holds m1 multitude_of p = m2 multitude_of p;
compatibility
proof
thus m1 = m2 implies
for p be object st p in P holds m1 multitude_of p = m2 multitude_of p;
A1: dom m1 = P by FUNCT_2:def 1;
dom m2 = P by FUNCT_2:def 1;
hence (for p being object st p in P
holds m1 multitude_of p = m2 multitude_of p)
implies m1 = m2 by A1,FUNCT_1:2;
end;
end;
definition
let P;
func {$} P -> marking of P equals
P --> 0;
coherence;
end;
definition
let P be set;
let m1, m2 be marking of P;
pred m1 c= m2 means
for p being set st p in P holds
m1 multitude_of p <= m2 multitude_of p;
reflexivity;
end;
Lm1: p in P implies ({$}P).p = 0 by FUNCOP_1:7;
theorem Th1:
{$}P c= m
by Lm1;
theorem Th2:
m1 c= m2 & m2 c= m3 implies m1 c= m3
proof
assume that
A1: m1 c= m2 and
A2: m2 c= m3;
let p;
assume
A3: p in P;
then
A4: m1.p <= m2.p by A1;
m2.p <= m3.p by A2,A3;
hence thesis by A4,XXREAL_0:2;
end;
definition
let P be set;
let m1, m2 be marking of P;
redefine func m1 + m2 -> marking of P means
:Def4:
for p being set st p in P holds
it multitude_of p = (m1 multitude_of p)+(m2 multitude_of p);
coherence
proof
dom (m1+m2) = P by FUNCT_2:def 1;
hence thesis;
end;
compatibility
proof
let m be marking of P;
thus m = m1+m2 implies for p being set st p in P holds
m multitude_of p = (m1 multitude_of p)+(m2 multitude_of p) by VALUED_1:1;
assume
A1: for p being set st p in P holds
m multitude_of p = (m1 multitude_of p)+(m2 multitude_of p);
A2: dom m = P by FUNCT_2:def 1;
A3: dom (m1+m2) = dom m1 /\ dom m2 by VALUED_1:def 1
.= P /\ dom m2 by FUNCT_2:def 1
.= P /\ P by FUNCT_2:def 1;
now
let x be object;
assume
A4: x in dom m;
hence m.x = m1.x+m2.x by A1,A2
.= (m1+m2).x by A2,A3,A4,VALUED_1:def 1;
end;
hence thesis by A2,A3,FUNCT_1:2;
end;
end;
theorem
m + {$}P = m
proof
now
let p;
assume p in P;
then ({$}P).p = 0 by Lm1;
hence m.p = m.p + ({$}P).p;
end;
hence thesis by Def4;
end;
definition
let P be set;
let m1, m2 be marking of P such that
A1: m2 c= m1;
func m1 - m2 -> marking of P means
:Def5:
for p being set st p in P holds
it multitude_of p = (m1 multitude_of p)-(m2 multitude_of p);
existence
proof
deffunc F(set) = (m1 multitude_of $1)-'(m2 multitude_of $1);
consider m being marking of P such that
A2: for p st p in P holds m multitude_of p = F(p) from MarkingLambda;
take m;
let p;
assume
A3: p in P;
then
A4: (m1 multitude_of p) >= (m2 multitude_of p) by A1;
thus m multitude_of p = (m1 multitude_of p)-'(m2 multitude_of p) by A2,A3
.= (m1 multitude_of p)-(m2 multitude_of p) by A4,XREAL_1:233;
end;
uniqueness
proof
let M1, M2 be marking of P such that
A5: for p being set st p in P holds
M1 multitude_of p = (m1 multitude_of p) - (m2 multitude_of p) and
A6: for p st p in P holds
M2 multitude_of p = (m1 multitude_of p) - (m2 multitude_of p);
let p be object;
assume
A7: p in P;
hence
M1 multitude_of p = (m1 multitude_of p) - (m2 multitude_of p) by A5
.= M2 multitude_of p by A6,A7;
end;
end;
theorem Th4:
m1 c= m1 + m2
proof
let p;
assume p in P;
then (m1 + m2) multitude_of p = (m1 multitude_of p)+(m2 multitude_of p)
by Def4;
hence thesis by NAT_1:11;
end;
theorem
m - {$}P = m
proof
A1: now
let p;
assume p in P;
then ({$}P).p = 0 by Lm1;
hence m.p = m.p - ({$}P).p;
end;
{$}P c= m by Th1;
hence thesis by A1,Def5;
end;
theorem
m1 c= m2 & m2 c= m3 implies m3 - m2 c= m3 - m1
proof
assume that
A1: m1 c= m2 and
A2: m2 c= m3;
A3: m1 c= m3 by A1,A2,Th2;
let p;
assume
A4: p in P;
then
A5: m1.p <= m2.p by A1;
A6: (m3-m1).p = m3.p - m1.p by A3,A4,Def5;
(m3-m2).p = m3.p - m2.p by A2,A4,Def5;
hence thesis by A5,A6,XREAL_1:10;
end;
theorem Th7:
(m1 + m2) - m2 = m1
proof
let p be object;
assume
A1: p in P;
m2 c= (m1 + m2) by Th4;
hence ((m1 + m2) - m2).p = (m1 + m2) .p - m2.p by A1,Def5
.= m1.p + m2.p - m2.p by A1,Def4
.= m1.p;
end;
theorem Th8:
m c= m1 & m1 c= m2 implies m1 - m c= m2 - m
proof
assume
A1: m c= m1;
assume
A2: m1 c= m2;
let p;
assume
A3: p in P;
A4: m c= m2 by A1,A2,Th2;
m1.p <= m2.p by A2,A3;
then (m1.p - m.p) <= (m2.p - m.p) by XREAL_1:9;
then (m1 - m).p <= m2.p - m.p by A1,A3,Def5;
hence thesis by A3,A4,Def5;
end;
theorem Th9:
m1 c= m2 implies m2 + m3 -m1 = m2 - m1 + m3
proof
assume
A1: m1 c= m2;
let p be object;
assume
A2: p in P;
m2 c= m2 + m3 by Th4;
then
A3: m1 c= m2 + m3 by A1,Th2;
(m2 - m1 + m3).p = (m2 - m1).p + m3.p by A2,Def4
.= m3.p + (m2.p - m1.p) by A1,A2,Def5
.= m3.p + m2.p - m1.p
.= (m3 + m2).p - m1.p by A2,Def4
.= (m2 + m3 - m1).p by A2,A3,Def5;
hence thesis;
end;
theorem
m1 c= m2 & m2 c= m1 implies m1 = m2
proof
assume
A1: m1 c= m2;
assume
A2: m2 c= m1;
let p be object;
assume
A3: p in P;
then
A4: m1.p <= m2.p by A1;
m2.p <= m1.p by A2,A3;
hence thesis by A4,XXREAL_0:1;
end;
theorem Th11:
(m1 + m2) + m3 = m1 + (m2 + m3)
proof
let p be object;
assume
A1: p in P;
then
A2: ((m1 + m2) + m3).p = (m1 + m2).p + m3.p by Def4
.= m1.p + m2.p + m3.p by A1,Def4;
(m1 + (m2 + m3)).p = m1.p + (m2 + m3).p by A1,Def4
.= m1.p + (m2.p + m3.p) by A1,Def4
.= m1.p + m2.p + m3.p;
hence thesis by A2;
end;
theorem
m1 c= m2 & m3 c= m4 implies m1 + m3 c= m2 + m4
proof
assume
A1: m1 c= m2;
assume
A2: m3 c= m4;
let p;
assume
A3: p in P;
then
A4: m1.p <= m2.p by A1;
m3.p <= m4.p by A2,A3;
then
A5: m1.p + m3.p <= m2.p + m4.p by A4,XREAL_1:7;
(m1 + m3).p = m1.p + m3.p by A3,Def4;
hence thesis by A3,A5,Def4;
end;
theorem
m1 c= m2 implies m2 - m1 c= m2
proof
assume
A1: m1 c= m2;
let p;
assume p in P;
then
A2: (m2 - m1).p = m2.p - m1.p by A1,Def5;
m2.p - 0 = m2.p;
hence thesis by A2,XREAL_1:13;
end;
theorem Th14:
m1 c= m2 & m3 c= m4 & m4 c= m1 implies m1 - m4 c= m2 - m3
proof
assume
A1: m1 c= m2;
assume
A2: m3 c= m4;
assume
A3: m4 c= m1;
then m4 c= m2 by A1,Th2;
then
A4: m3 c= m2 by A2,Th2;
let p;
assume
A5: p in P;
then
A6: m1.p <= m2.p by A1;
A7: m3.p <= m4.p by A2,A5;
A8: (m2 - m3).p = m2.p - m3.p by A4,A5,Def5;
(m1 - m4).p = m1.p - m4.p by A3,A5,Def5;
hence thesis by A6,A7,A8,XREAL_1:13;
end;
theorem Th15:
m1 c= m2 implies m2 = (m2 - m1) + m1
proof
assume
A1: m1 c= m2;
let p be object;
assume
A2: p in P;
then ((m2 - m1) + m1).p = (m2 - m1).p + m1.p by Def4
.= m2.p - m1.p + m1.p by A1,A2,Def5
.= m2.p;
hence thesis;
end;
theorem Th16:
(m1 + m2) - m1 = m2
proof
A1: m1 c= m1 + m2 by Th4;
let p be object;
assume
A2: p in P;
then ((m1 + m2) - m1).p = (m1 + m2).p - m1.p by A1,Def5
.= m1.p + m2.p - m1.p by A2,Def4
.= m2.p;
hence thesis;
end;
theorem Th17:
m2 + m3 c= m1 implies (m1 - m2) - m3 = m1 - (m2 + m3)
proof
assume m2 + m3 c= m1;
then (m1 - m2) - m3 = ((m1 - (m2 + m3)) + (m2 + m3)) - m2 - m3 by Th15
.= (((m1 - (m2 + m3) + m3) + m2) - m2) - m3 by Th11
.= ((m1 - (m2 + m3)) + m3) - m3 by Th16
.= m1 - (m2 + m3) by Th16;
hence thesis;
end;
theorem
m3 c= m2 & m2 c= m1 implies m1 - (m2 - m3) = (m1 - m2) + m3
proof
assume
A1: m3 c= m2;
assume
A2: m2 c= m1;
A3: m2 - m3 c= m3 + (m2 - m3) by Th4;
A4: m2 = m3 + (m2 - m3) by A1,Th15;
then (m3 + (m2 - m3)) - (m2 - m3) c= m1 - (m2 - m3) by A2,A3,Th14;
then
A5: m3 c= m1 - (m2 - m3) by Th16;
thus (m1 - m2) + m3 = ((m1 - (m2 - m3)) - m3) + m3 by A2,A4,Th17
.= m1 - (m2 - m3) by A5,Th15;
end;
begin :: Transitions and firing
definition
let P;
mode transition of P -> set means
:Def6:
ex m1,m2 st it=[m1,m2];
existence
proof
set m1 = the marking of P;
take [m1, m1];
thus thesis;
end;
end;
reserve t,t1,t2 for transition of P;
notation
let P,t;
synonym Pre t for t`1;
synonym Post t for t`2;
end;
definition
let P,t;
redefine func Pre t -> marking of P;
coherence
proof
ex m1,m2 st t = [m1,m2] by Def6;
hence thesis;
end;
redefine func Post t -> marking of P;
coherence
proof
ex m1, m2 st t = [m1, m2] by Def6;
hence thesis;
end;
end;
definition
let P, m, t;
func fire(t,m) -> marking of P equals
:Def7:
(m - Pre t) + Post t if Pre t c= m otherwise m;
coherence;
consistency;
end;
theorem
(Pre t1) + (Pre t2) c= m implies
fire(t2, fire(t1,m)) = (m - (Pre t1) - Pre t2) + (Post t1) + (Post t2)
proof
assume
A1: (Pre t1) + (Pre t2) c= m;
A2: (Pre t1) c= (Pre t1) + (Pre t2) by Th4;
then
A3: (Pre t1) c= m by A1,Th2;
then
A4: fire(t1, m) = m - (Pre t1) + (Post t1) by Def7;
A5: Pre t2 = (Pre t2) + (Pre t1) - (Pre t1) by Th7;
A6: (Pre t1) + (Pre t2) - (Pre t1) c= m - (Pre t1) by A1,A2,Th8;
m - (Pre t1) c= m - (Pre t1) + (Post t1) by Th4;
then (Pre t2) c= fire(t1, m) by A4,A5,A6,Th2;
hence fire(t2, fire(t1, m)) = fire(t1, m)- (Pre t2) + (Post t2) by Def7
.= (m - (Pre t1) + (Post t1)) - (Pre t2) + (Post t2) by A3,Def7
.= (m - (Pre t1) - (Pre t2)) + (Post t1) + (Post t2) by A1,A2,A5,Th8,Th9;
end;
definition
let P, t;
func fire t -> Function means
: Def8:
dom it = Funcs(P, NAT) &
for m being marking of P holds it.m = fire(t,m);
existence
proof
defpred P[object,object] means ex m st m = $1 & $2 = fire(t, m);
A1: for x being object st x in Funcs(P, NAT) ex y being object st P[x,y]
proof
let x be object;
assume x in Funcs(P, NAT);
then reconsider m = x as marking of P by FUNCT_2:66;
take fire(t, m);
thus thesis;
end;
consider f being Function such that
A2: dom f = Funcs(P, NAT) and
A3: for x being object st x in Funcs(P, NAT) holds P[x,f.x]
from CLASSES1:sch 1(A1);
take f;
thus dom f = Funcs(P, NAT) by A2;
let m;
m in Funcs(P, NAT) by FUNCT_2:8;
then P[m,f.m] by A3;
hence thesis;
end;
uniqueness
proof
let f1,f2 be Function such that
A4: dom f1 = Funcs(P, NAT) and
A5: for m being marking of P holds f1.m = fire(t,m) and
A6: dom f2 = Funcs(P, NAT) and
A7: for m being marking of P holds f2.m = fire(t,m);
now
let x be object;
assume x in dom f1;
then reconsider m = x as marking of P by A4,FUNCT_2:66;
thus f1.x = fire(t,m) by A5
.= f2.x by A7;
end;
hence thesis by A4,A6,FUNCT_1:2;
end;
end;
theorem Th20:
rng fire t c= Funcs(P, NAT)
proof
let y be object;
assume y in rng fire t;
then consider x being object such that
A1: x in dom fire t and
A2: y = (fire t).x by FUNCT_1:def 3;
dom fire t = Funcs(P, NAT) by Def8;
then reconsider m=x as marking of P by A1,FUNCT_2:66;
y = fire(t,m) by A2,Def8;
hence thesis by FUNCT_2:8;
end;
theorem
fire(t2, fire(t1,m)) = ((fire t2)*(fire t1)).m
proof
dom fire t1 = Funcs(P, NAT) by Def8;
then
A1: m in dom(fire t1) by FUNCT_2:8;
thus fire(t2, fire(t1,m)) = (fire t2).fire(t1,m) by Def8
.= (fire t2).((fire t1).m) by Def8
.= ((fire t2)*(fire t1)).m by A1,FUNCT_1:13;
end;
definition
let P;
mode Petri_net of P -> non empty set means
:Def9:
for x being set st x in it holds x is transition of P;
existence
proof
set t = the transition of P;
take {t};
thus thesis by TARSKI:def 1;
end;
end;
reserve N for Petri_net of P;
definition
let P, N;
redefine mode Element of N -> transition of P;
coherence by Def9;
end;
reserve e, e1,e2 for Element of N;
begin :: Firing sequences of transitions
definition
let P, N;
mode firing-sequence of N is Element of N*;
end;
reserve C,C1,C2,C3,fs,fs1,fs2 for firing-sequence of N;
definition
let P, N, C;
func fire C -> Function means
:Def10:
ex F being Function-yielding FinSequence st it = compose(F, Funcs(P, NAT)) &
len F = len C & for i being Element of NAT st i in dom C
holds F.i = fire (C /. i qua Element of N);
existence
proof
deffunc G(set) = fire (C/.$1 qua Element of N);
consider F being FinSequence such that
A1: len F = len C and
A2: for k being Nat st k in dom F holds F.k = G(k) from FINSEQ_1:sch 2;
A3: dom F = Seg len F by FINSEQ_1:def 3;
A4: dom C = Seg len C by FINSEQ_1:def 3;
F is Function-yielding
proof
let x be object;
assume
A5: x in dom F;
then reconsider i = x as Element of NAT;
F.x = fire (C/.i qua Element of N) by A2,A5;
hence thesis;
end;
then reconsider F as Function-yielding FinSequence;
take f = compose(F, Funcs(P, NAT)), F;
thus f = compose(F, Funcs(P, NAT));
thus thesis by A1,A2,A3,A4;
end;
uniqueness
proof
let f1,f2 be Function;
given F1 being Function-yielding FinSequence such that
A6: f1 = compose(F1, Funcs(P, NAT)) and
A7: len F1 = len C and
A8: for i being Element of NAT st i in dom C
holds F1.i = fire (C/.i qua Element of N);
given F2 being Function-yielding FinSequence such that
A9: f2 = compose(F2, Funcs(P, NAT)) and
A10: len F2 = len C and
A11: for i being Element of NAT st i in dom C
holds F2.i = fire (C/.i qua Element of N);
A12: dom F1 = Seg len F1 by FINSEQ_1:def 3;
A13: dom F2 = Seg len F2 by FINSEQ_1:def 3;
A14: dom C = Seg len C by FINSEQ_1:def 3;
now
let i be Nat;
assume
A15: i in dom C;
then F1.i = fire (C/.i qua Element of N) by A8;
hence F1.i = F2.i by A11,A15;
end;
hence thesis by A6,A7,A9,A10,A12,A13,A14,FINSEQ_1:13;
end;
end;
:: Firing of empty firing-sequence <*>N
theorem
fire(<*>N) = id Funcs(P, NAT)
proof
consider F being Function-yielding FinSequence such that
A1: fire(<*>N) = compose(F, Funcs(P, NAT)) and
A2: len F = len <*>N and
for i being Element of NAT st i in dom <*>N holds
F.i = fire ((<*>N)/.i qua Element of N) by Def10;
F = {} by A2;
hence thesis by A1,FUNCT_7:39;
end;
:: Firing of firing-sequence with one translation <*e*>
theorem Th23:
fire <*e*> = fire e
proof
consider F being Function-yielding FinSequence such that
A1: fire <*e*> = compose(F, Funcs(P, NAT)) and
A2: len F = len <*e*> and
A3: for i being Element of NAT st i in dom <*e*> holds
F.i = fire (<*e*>/.i qua Element of N) by Def10;
A4: len <*e*> = 1 by FINSEQ_1:40;
A5: <*e*>.1 = e by FINSEQ_1:40;
dom <*e*> = {1} by FINSEQ_1:2,def 8;
then
A6: 1 in dom <*e*> by TARSKI:def 1;
then
A7: <*e*>/.1 = <*e*>.1 by PARTFUN1:def 6;
F.1 = fire (<*e*>/.1 qua Element of N) by A3,A6;
then
A8: F = <*fire e*> by A2,A4,A5,A7,FINSEQ_1:40;
dom fire e c= Funcs(P,NAT) by Def8;
hence thesis by A1,A8,FUNCT_7:46;
end;
theorem Th24:
(fire e)*id Funcs(P, NAT) = fire e
proof
A1: compose(<*fire e*>, Funcs(P, NAT)) = (fire e)*id Funcs(P, NAT)
by FUNCT_7:45;
dom fire e c= Funcs(P, NAT) by Def8;
hence thesis by A1,FUNCT_7:46;
end;
:: Firing of firing-sequence with two translations <*e1,e2*>
theorem
fire <*e1,e2*> = (fire e2)*(fire e1)
proof
consider F being Function-yielding FinSequence such that
A1: fire <*e1,e2*> = compose(F, Funcs(P, NAT)) and
A2: len F = len <*e1,e2*> and
A3: for i being Element of NAT st i in dom <*e1,e2*> holds
F.i = fire (<*e1,e2*>/.i qua Element of N) by Def10;
A4: len <*e1,e2*> = 2 by FINSEQ_1:44;
A5: <*e1,e2*>.1 = e1 by FINSEQ_1:44;
A6: <*e1,e2*>.2 = e2 by FINSEQ_1:44;
A7: dom <*e1,e2*> = {1,2} by A4,FINSEQ_1:2,def 3;
A8: 1 in {1,2} by TARSKI:def 2;
A9: 2 in {1,2} by TARSKI:def 2;
A10: <*e1,e2*>/.1 = <*e1,e2*>.1 by A7,A8,PARTFUN1:def 6;
A11: <*e1,e2*>/.2 = <*e1,e2*>.2 by A7,A9,PARTFUN1:def 6;
A12: F.1 = fire e1 by A3,A5,A7,A8,A10;
F.2 = fire e2 by A3,A6,A7,A9,A11;
then
A13: F = <*fire e1,fire e2*> by A2,A4,A12,FINSEQ_1:44;
(fire e1)*id Funcs(P, NAT) = fire e1 by Th24;
then (fire e2)*(fire e1)*id Funcs(P, NAT) = (fire e2)*(fire e1)
by RELAT_1:36;
hence thesis by A1,A13,FUNCT_7:51;
end;
theorem Th26:
dom fire C = Funcs(P, NAT) & rng fire C c= Funcs(P, NAT)
proof
defpred P[Nat] means for F being Function-yielding FinSequence st
len F = $1 & for i st i in dom F ex t st F.i = fire t
holds dom compose(F, Funcs(P, NAT)) = Funcs(P, NAT) &
rng compose(F, Funcs(P, NAT)) c= Funcs(P, NAT);
A1: P[0]
proof
let F be Function-yielding FinSequence;
assume len F = 0;
then F = {};
then compose(F, Funcs(P, NAT)) = id Funcs(P, NAT) by FUNCT_7:39;
hence thesis;
end;
A2: for k st P[k] holds P[k + 1]
proof
let k such that
A3: for G being Function-yielding FinSequence st len G = k &
for i st i in dom G ex t st G.i = fire t
holds dom compose(G, Funcs(P, NAT)) = Funcs(P, NAT) &
rng compose(G, Funcs(P, NAT)) c= Funcs(P, NAT);
let F be Function-yielding FinSequence such that
A4: len F = k+1 and
A5: for i st i in dom F ex t st F.i = fire t;
consider G being FinSequence, x being set such that
A6: F = G^<*x*> and
A7: len G = k by A4,TREES_2:3;
reconsider G as Function-yielding FinSequence by A6,FUNCT_7:23;
0 qua Nat+1 <= k+1 by XREAL_1:7;
then k+1 in dom F by A4,FINSEQ_3:25;
then consider t such that
A8: F.(k+1) = fire t by A5;
x = F.(k+1) by A6,A7,FINSEQ_1:42;
then
A9: compose(F, Funcs(P, NAT)) = (fire t)*compose(G, Funcs(P, NAT))
by A6,A8,FUNCT_7:41;
A10: dom fire t = Funcs(P, NAT) by Def8;
A11: rng fire t c= Funcs(P, NAT) by Th20;
A12: for i st i in dom G ex t st G.i = fire t
proof
let i;
A13: dom G c= dom F by A6,FINSEQ_1:26;
assume
A14: i in dom G;
then G.i = F.i by A6,FINSEQ_1:def 7;
hence thesis by A5,A13,A14;
end;
then
A15: dom compose(G, Funcs(P, NAT)) = Funcs(P, NAT) by A3,A7;
A16: rng compose(G, Funcs(P, NAT)) c= Funcs(P, NAT) by A3,A7,A12;
rng compose(F, Funcs(P, NAT)) c= rng fire t by A9,RELAT_1:26;
hence thesis by A9,A10,A11,A15,A16,RELAT_1:27;
end;
A17: P[k] from NAT_1:sch 2(A1,A2);
consider F being Function-yielding FinSequence such that
A18: fire C = compose(F, Funcs(P, NAT)) and
A19: len F = len C and
A20: for i being Element of NAT st i in dom C holds
F.i = fire (C/.i qua Element of N) by Def10;
for i st i in dom F ex t st F.i = fire t
proof
let i;
assume
A21: i in dom F;
A22: dom F = Seg len F by FINSEQ_1:def 3;
A23: dom C = Seg len C by FINSEQ_1:def 3;
reconsider t = C/.i as Element of N;
take t;
thus thesis by A19,A20,A21,A22,A23;
end;
hence thesis by A17,A18,A19;
end;
:: Firing of compound firing-sequence
theorem Th27:
fire (C1^C2) = (fire C2)*(fire C1)
proof
consider F being Function-yielding FinSequence such that
A1: fire (C1^C2) = compose(F, Funcs(P, NAT)) and
A2: len F = len (C1^C2) and
A3: for i being Element of NAT st i in dom (C1^C2) holds
F.i = fire ((C1^C2)/.i qua Element of N) by Def10;
consider F1 being Function-yielding FinSequence such that
A4: fire C1 = compose(F1, Funcs(P, NAT)) and
A5: len F1 = len C1 and
A6: for i being Element of NAT st i in dom C1 holds
F1.i = fire (C1/.i qua Element of N) by Def10;
consider F2 being Function-yielding FinSequence such that
A7: fire C2 = compose(F2, Funcs(P, NAT)) and
A8: len F2 = len C2 and
A9: for i being Element of NAT st i in dom C2 holds
F2.i = fire (C2/.i qua Element of N) by Def10;
A10: rng fire C1 c= Funcs(P, NAT) by Th26;
len F = len C1 + len C2 by A2,FINSEQ_1:22;
then
A11: dom F = Seg (len F1 + len F2) by A5,A8,FINSEQ_1:def 3;
A12: for k be Nat st k in dom F1 holds F.k = F1.k
proof
let k be Nat;
assume
A13: k in dom F1;
A14: dom F1 = Seg len F1 by FINSEQ_1:def 3;
A15: dom F1 = Seg len C1 by A5,FINSEQ_1:def 3;
A16: dom F1 = dom C1 by A5,A14,FINSEQ_1:def 3;
A17: k in dom C1 by A13,A15,FINSEQ_1:def 3;
A18: dom C1 c= dom (C1^C2) by FINSEQ_1:26;
then
A19: F.k = fire ((C1^C2)/.k qua Element of N) by A3,A17;
A20: (C1^C2)/.k = (C1^C2).k by A17,A18,PARTFUN1:def 6;
A21: (C1^C2).k = C1.k by A13,A16,FINSEQ_1:def 7;
C1.k = C1/.k by A13,A16,PARTFUN1:def 6;
hence thesis by A6,A13,A16,A19,A20,A21;
end;
for k be Nat st k in dom F2 holds F.(len F1 + k) = F2.k
proof
let k be Nat;
assume
A22: k in dom F2;
dom F2 = Seg len F2 by FINSEQ_1:def 3;
then
A23: dom F2 = dom C2 by A8,FINSEQ_1:def 3;
then
A24: len F1 + k in dom (C1^C2) by A5,A22,FINSEQ_1:28;
reconsider lFk = len F1 + k as Element of NAT by ORDINAL1:def 12;
A25: F.(len F1 + k) = fire ((C1^C2)/.lFk qua Element of N)
by A3,A5,A22,A23,FINSEQ_1:28;
A26: (C1^C2)/.(len F1 + k) = (C1^C2).(len F1 +k) by A24,PARTFUN1:def 6;
A27: (C1^C2).(len F1 + k) = C2.k by A5,A22,A23,FINSEQ_1:def 7;
C2.k = C2/.k by A22,A23,PARTFUN1:def 6;
hence thesis by A9,A22,A23,A25,A26,A27;
end;
then F = F1^F2 by A11,A12,FINSEQ_1:def 7;
hence thesis by A1,A4,A7,A10,FUNCT_7:48;
end;
theorem
fire (C^<*e*>) = (fire e)*(fire C)
proof
fire (C^<*e*>) = (fire <*e*>)*(fire C) by Th27;
hence thesis by Th23;
end;
definition
let P, N, C, m;
func fire(C, m) -> marking of P equals
(fire C).m;
coherence
proof
A1: dom fire C = Funcs(P, NAT) by Th26;
A2: rng fire C c= Funcs(P, NAT) by Th26;
m in dom fire C by A1,FUNCT_2:8;
then [m,(fire C).m] in fire C by FUNCT_1:def 2;
then (fire C).m in rng fire C by XTUPLE_0:def 13;
hence thesis by A2,FUNCT_2:66;
end;
end;
begin :: Sequential composition
definition
let P, N;
mode process of N is Subset of N*;
end;
reserve R, R1, R2, R3, P1, P2 for process of N;
definition
let P, N, R1, R2;
func R1 before R2 -> process of N equals
{C1^C2: C1 in R1 & C2 in R2};
coherence
proof
set X = {C1^C2: C1 in R1 & C2 in R2};
X c= N*
proof
let x be object;
assume x in X;
then ex C1,C2 st x = C1^C2 & C1 in R1 & C2 in R2;
hence thesis;
end;
hence thesis;
end;
end;
registration
let P, N;
let R1, R2 be non empty process of N;
cluster R1 before R2 -> non empty;
coherence
proof
consider fs1 being object such that
A1: fs1 in R1 by XBOOLE_0:def 1;
consider fs2 being object such that
A2: fs2 in R2 by XBOOLE_0:def 1;
reconsider fs1,fs2 as firing-sequence of N by A1,A2;
fs1^fs2 in R1 before R2 by A1,A2;
hence thesis;
end;
end;
theorem Th29:
(R1 \/ R2) before R = (R1 before R) \/ (R2 before R)
proof
thus (R1 \/ R2) before R c= (R1 before R) \/ (R2 before R)
proof
let x be object;
assume x in (R1 \/ R2) before R;
then consider fs1, fs such that
A1: x = fs1^fs and
A2: fs1 in R1 \/ R2 and
A3: fs in R;
fs1 in R1 or fs1 in R2 by A2,XBOOLE_0:def 3;
then x in {a1^a where a1,a is firing-sequence of N: a1 in R1 & a in R} or
x in {b2^b where b2,b is firing-sequence of N: b2 in R2 & b in R} by A1,A3;
hence thesis by XBOOLE_0:def 3;
end;
let x be object;
assume
A4: x in (R1 before R) \/ (R2 before R);
per cases by A4,XBOOLE_0:def 3;
suppose x in R1 before R;
then consider fs1, fs such that
A5: x = fs1^fs and
A6: fs1 in R1 and
A7: fs in R;
fs1 in R1 \/ R2 by A6,XBOOLE_0:def 3;
hence thesis by A5,A7;
end;
suppose x in R2 before R;
then consider fs2, fs such that
A8: x = fs2^fs and
A9: fs2 in R2 and
A10: fs in R;
fs2 in R1 \/ R2 by A9,XBOOLE_0:def 3;
hence thesis by A8,A10;
end;
end;
theorem Th30:
R before (R1 \/ R2) = (R before R1) \/ (R before R2)
proof
thus R before (R1 \/ R2) c= (R before R1) \/ (R before R2)
proof
let x be object;
assume x in R before (R1 \/ R2);
then consider fs, fs1 such that
A1: x = fs^fs1 and
A2: fs in R and
A3: fs1 in R1 \/ R2;
fs1 in R1 or fs1 in R2 by A3,XBOOLE_0:def 3;
then x in {a^a1 where a,a1 is firing-sequence of N: a in R & a1 in R1} or
x in {b^b2 where b,b2 is firing-sequence of N: b in R & b2 in R2} by A1,A2;
hence thesis by XBOOLE_0:def 3;
end;
let x be object;
assume
A4: x in (R before R1) \/ (R before R2);
per cases by A4,XBOOLE_0:def 3;
suppose x in R before R1;
then consider fs, fs1 such that
A5: x = fs^fs1 and
A6: fs in R and
A7: fs1 in R1;
fs1 in R1 \/ R2 by A7,XBOOLE_0:def 3;
hence thesis by A5,A6;
end;
suppose x in R before R2;
then consider fs, fs2 such that
A8: x = fs^fs2 and
A9: fs in R and
A10: fs2 in R2;
fs2 in R1 \/ R2 by A10,XBOOLE_0:def 3;
hence thesis by A8,A9;
end;
end;
theorem Th31:
{C1} before {C2} = {C1^C2}
proof
thus {C1} before {C2} c= {C1^C2}
proof
let x be object;
assume x in {C1} before {C2};
then consider fs1, fs2 such that
A1: x = fs1^fs2 and
A2: fs1 in {C1} and
A3: fs2 in {C2};
A4: fs1 = C1 by A2,TARSKI:def 1;
fs2 = C2 by A3,TARSKI:def 1;
hence thesis by A1,A4,TARSKI:def 1;
end;
let x be object;
assume x in {C1^C2};
then
A5: x = C1^C2 by TARSKI:def 1;
A6: C1 in {C1} by TARSKI:def 1;
C2 in {C2} by TARSKI:def 1;
hence thesis by A5,A6;
end;
theorem
{C1,C2} before {C} = {C1^C, C2^C}
proof
thus
{C1,C2} before {C} = ({C1} \/ {C2}) before {C} by ENUMSET1:1
.= ({C1} before {C}) \/ ({C2} before {C}) by Th29
.= {C1^C} \/ ({C2} before {C}) by Th31
.= {C1^C} \/ {C2^C} by Th31
.= {C1^C, C2^C} by ENUMSET1:1;
end;
theorem
{C} before {C1,C2} = {C^C1, C^C2}
proof
thus
{C} before {C1,C2} = {C} before ({C1} \/ {C2}) by ENUMSET1:1
.= ({C} before {C1}) \/ ({C} before {C2}) by Th30
.= {C^C1} \/ ({C} before {C2}) by Th31
.= {C^C1} \/ {C^C2} by Th31
.= {C^C1, C^C2} by ENUMSET1:1;
end;
begin :: Concurrent composition
definition
let P, N, R1, R2;
func R1 concur R2 -> process of N equals
{C: ex q1,q2 being FinSubsequence st C = q1 \/ q2 & q1 misses q2 &
Seq q1 in R1 & Seq q2 in R2};
coherence
proof
set X = {C: ex q1,q2 being FinSubsequence st C = q1 \/ q2 &
q1 misses q2 & Seq q1 in R1 & Seq q2 in R2};
X c= N*
proof
let x be object;
assume x in X;
then ex C st x = C & ex q1,q2 being FinSubsequence st C = q1 \/ q2 &
q1 misses q2 & Seq q1 in R1 & Seq q2 in R2;
hence thesis;
end;
hence thesis;
end;
commutativity
proof
let R,R1,R2;
assume
A1: R = {C1: ex q1,q2 being FinSubsequence st C1 = q1 \/ q2 &
q1 misses q2 & Seq q1 in R1 & Seq q2 in R2};
thus R c= {C2: ex q1,q2 being FinSubsequence st C2 = q1 \/ q2 &
q1 misses q2 & Seq q1 in R2 & Seq q2 in R1}
proof
let x be object;
assume x in R;
then
A2: ex C1 st ( x = C1)&( ex q1,q2 being FinSubsequence st C1 =
q1 \/ q2 & q1 misses q2 & Seq q1 in R1 & Seq q2 in R2) by A1;
thus thesis by A2;
end;
let x be object;
assume x in {C2: ex q1,q2 being FinSubsequence st C2 = q1 \/ q2 &
q1 misses q2 & Seq q1 in R2 & Seq q2 in R1};
then ex C2 st ( x = C2)&( ex q1,q2 being FinSubsequence st C2 =
q1 \/ q2 & q1 misses q2 & Seq q1 in R2 & Seq q2 in R1);
hence thesis by A1;
end;
end;
theorem Th34:
(R1 \/ R2) concur R = (R1 concur R) \/ (R2 concur R)
proof
thus (R1 \/ R2) concur R c= (R1 concur R) \/ (R2 concur R)
proof
let x be object;
assume x in (R1 \/ R2) concur R;
then consider C such that
A1: x = C and
A2: ex q1,q2 being FinSubsequence st C = q1 \/ q2 & q1 misses q2 & Seq
q1 in R1 \/ R2 & Seq q2 in R;
consider q1,q2 being FinSubsequence such that
A3: C = q1 \/ q2 and
A4: q1 misses q2 and
A5: Seq q1 in R1 \/ R2 and
A6: Seq q2 in R by A2;
Seq q1 in R1 or Seq q1 in R2 by A5,XBOOLE_0:def 3;
then x in {C1: ex q1,q2 being FinSubsequence st C1 = q1 \/ q2 & q1
misses q2 & Seq q1 in R1 & Seq q2 in R} or
x in {C2: ex q1,q2 being FinSubsequence st C2 = q1 \/ q2 & q1 misses q2
& Seq q1 in R2 & Seq q2 in R} by A1,A3,A4,A6;
hence thesis by XBOOLE_0:def 3;
end;
let x be object;
assume
A7: x in (R1 concur R) \/ (R2 concur R);
per cases by A7,XBOOLE_0:def 3;
suppose x in R1 concur R;
then consider C such that
A8: x = C and
A9: ex q1,q2 being FinSubsequence st C = q1 \/ q2 & q1 misses q2 & Seq
q1 in R1 & Seq q2 in R;
consider q1,q2 being FinSubsequence such that
A10: C = q1 \/ q2 and
A11: q1 misses q2 and
A12: Seq q1 in R1 and
A13: Seq q2 in R by A9;
Seq q1 in R1 \/ R2 by A12,XBOOLE_0:def 3;
hence thesis by A8,A10,A11,A13;
end;
suppose x in R2 concur R;
then consider C such that
A14: x = C and
A15: ex q1,q2 being FinSubsequence st C = q1 \/ q2 & q1 misses q2 & Seq
q1 in R2 & Seq q2 in R;
consider q1,q2 being FinSubsequence such that
A16: C = q1 \/ q2 and
A17: q1 misses q2 and
A18: Seq q1 in R2 and
A19: Seq q2 in R by A15;
Seq q1 in R1 \/ R2 by A18,XBOOLE_0:def 3;
hence thesis by A14,A16,A17,A19;
end;
end;
theorem Th35:
{<*e1*>} concur {<*e2*>} = {<*e1,e2*>, <*e2,e1*>}
proof
set C1 = <*e1*>, C2 = <*e2*>;
set R1 = {C1}, R2 = {C2};
thus {C1} concur {C2} c= {<*e1,e2*>, <*e2,e1*>}
proof
let x be object;
assume x in {C1} concur {C2};
then consider C such that
A1: x = C and
A2: ex q1,q2 being FinSubsequence st C = q1 \/ q2 & q1 misses q2 & Seq
q1 in R1 & Seq q2 in R2;
consider q1,q2 being FinSubsequence such that
A3: C = q1 \/ q2 and
A4: q1 misses q2 and
A5: Seq q1 in R1 and
A6: Seq q2 in R2 by A2;
A7: Seq q1 = C1 by A5,TARSKI:def 1;
A8: Seq q2 = C2 by A6,TARSKI:def 1;
consider i being Element of NAT such that
A9: q1 = {[i,e1]} by A7,FINSEQ_3:159;
consider j being Element of NAT such that
A10: q2 = {[j,e2]} by A8,FINSEQ_3:159;
A11: [i,e1] in q1 by A9,TARSKI:def 1;
A12: [j,e2] in q2 by A10,TARSKI:def 1;
A13: C = {[i,e1], [j,e2]} by A3,A9,A10,ENUMSET1:1;
then i = 1 & j = 1 & e1 = e2 or i = 1 & j = 2 or i = 2 & j = 1
by FINSEQ_1:98;
then C = <*e1,e2*> or C = <*e2,e1*>
by A4,A11,A12,A13,FINSEQ_1:99,XBOOLE_0:3;
hence thesis by A1,TARSKI:def 2;
end;
let x be object;
assume
A14: x in {<*e1,e2*>, <*e2,e1*>};
per cases by A14,TARSKI:def 2;
suppose
A15: x = <*e1,e2*>;
then
A16: x = {[1,e1], [2,e2]} by FINSEQ_1:99
.= {[1,e1]} \/ {[2,e2]} by ENUMSET1:1;
reconsider q1 = {[1,e1]}, q2 = {[2,e2]} as FinSubsequence by FINSEQ_1:96;
[1,e1] <> [2,e2] by XTUPLE_0:1;
then not [1,e1] in q2 by TARSKI:def 1;
then
A17: q1 misses q2 by ZFMISC_1:50;
A18: Seq q1 = <*e1*> by FINSEQ_3:157;
A19: Seq q2 = <*e2*> by FINSEQ_3:157;
A20: <*e1*> in R1 by TARSKI:def 1;
<*e2*> in R2 by TARSKI:def 1;
hence thesis by A15,A16,A17,A18,A19,A20;
end;
suppose
A21: x = <*e2,e1*>;
then
A22: x = {[1,e2], [2,e1]} by FINSEQ_1:99
.= {[1,e2]} \/ {[2,e1]} by ENUMSET1:1;
reconsider q1 = {[2,e1]}, q2 = {[1,e2]} as FinSubsequence by FINSEQ_1:96;
[1,e2] <> [2,e1] by XTUPLE_0:1;
then not [2,e1] in q2 by TARSKI:def 1;
then
A23: q1 misses q2 by ZFMISC_1:50;
A24: Seq q1 = <*e1*> by FINSEQ_3:157;
A25: Seq q2 = <*e2*> by FINSEQ_3:157;
A26: <*e1*> in R1 by TARSKI:def 1;
<*e2*> in R2 by TARSKI:def 1;
hence thesis by A21,A22,A23,A24,A25,A26;
end;
end;
theorem
{<*e1*>,<*e2*>} concur {<*e*>} = {<*e1,e*>, <*e2,e*>, <*e,e1*>, <*e,e2*>}
proof
{<*e1*>,<*e2*>} = {<*e1*>} \/ {<*e2*>} by ENUMSET1:1;
then
A1: {<*e1*>,<*e2*>} concur {<*e*>}
= {<*e1*>} concur {<*e*>} \/ {<*e2*>} concur {<*e*>} by Th34;
A2: {<*e1*>} concur {<*e*>} = {<*e1,e*>,<*e,e1*>} by Th35;
{<*e2*>} concur {<*e*>} = {<*e2,e*>,<*e,e2*>} by Th35;
hence {<*e1*>,<*e2*>} concur {<*e*>}
= {<*e1,e*>, <*e,e1*>, <*e2,e*>, <*e,e2*>} by A1,A2,ENUMSET1:5
.= {<*e1,e*>, <*e2,e*>, <*e,e1*>, <*e,e2*>} by ENUMSET1:62;
end;
theorem
(R1 before R2) before R3 = R1 before (R2 before R3)
proof
thus (R1 before R2) before R3 c= R1 before (R2 before R3)
proof
let x be object;
assume x in (R1 before R2) before R3;
then consider C1,C2 such that
A1: x = C1^C2 and
A2: C1 in (R1 before R2) and
A3: C2 in R3;
consider fs1,fs2 such that
A4: C1 = fs1^fs2 and
A5: fs1 in R1 and
A6: fs2 in R2 by A2;
A7: x = fs1^(fs2^C2) by A1,A4,FINSEQ_1:32;
consider C3 such that
A8: C3 = fs2^C2 and
A9: fs2 in R2 and
A10: C2 in R3 by A3,A6;
C3 in R2 before R3 by A8,A9,A10;
hence thesis by A5,A7,A8;
end;
let x be object;
assume x in R1 before (R2 before R3);
then consider C1,C2 such that
A11: x = C1^C2 and
A12: C1 in R1 and
A13: C2 in R2 before R3;
consider fs1,fs2 such that
A14: C2 = fs1^fs2 and
A15: fs1 in R2 and
A16: fs2 in R3 by A13;
A17: x = (C1^fs1)^fs2 by A11,A14,FINSEQ_1:32;
consider C such that
A18: C = C1^fs1 and
A19: C1 in R1 and
A20: fs1 in R2 by A12,A15;
C in R1 before R2 by A18,A19,A20;
hence thesis by A16,A17,A18;
end;
notation
let p be FinSubsequence;
let i be Element of NAT;
synonym i Shift p for Shift(p,i);
end;
reserve q,q1,q2,q3,q4 for FinSubsequence,
p1,p2 for FinSequence;
theorem
(R1 concur R2) concur R3 = R1 concur (R2 concur R3)
proof
thus (R1 concur R2) concur R3 c= R1 concur (R2 concur R3)
proof
let x be object;
assume x in (R1 concur R2) concur R3;
then consider C1 such that
A1: x = C1 and
A2: ex q1,q2 st C1 = q1 \/ q2 & q1 misses q2 & Seq q1 in R1 concur R2 &
Seq q2 in R3;
consider q1,q2 such that
A3: C1 = q1 \/ q2 and
A4: q1 misses q2 and
A5: Seq q1 in R1 concur R2 and
A6: Seq q2 in R3 by A2;
consider C2 such that
A7: Seq q1 = C2 and
A8: ex q3,q4 st C2 = q3 \/ q4 & q3 misses q4 & Seq q3 in R1 & Seq q4 in
R2
by A5;
consider q3,q4 such that
A9: C2 = q3 \/ q4 and
A10: q3 misses q4 and
A11: Seq q3 in R1 and
A12: Seq q4 in R2 by A8;
consider n1 being Nat such that
A13: dom q1 c= Seg n1 by FINSEQ_1:def 12;
A14: q3 c= Seq q1 by A7,A9,XBOOLE_1:7;
A15: q4 c= Seq q1 by A7,A9,XBOOLE_1:7;
Sgm dom q1 is one-to-one by A13,FINSEQ_3:92;
then
A16: (Sgm dom q1).:dom q3 misses (Sgm dom q1).:dom q4
by A10,A14,A15,FUNCT_1:66,112;
A17: rng ((Sgm dom q1)|dom q3) = (Sgm dom q1).:dom q3 by RELAT_1:115;
A18: rng ((Sgm dom q1)|dom q4) = (Sgm dom q1).:dom q4 by RELAT_1:115;
then
A19: q1|rng((Sgm dom q1)|dom q3) misses q1|rng((Sgm dom q1)|dom q4) by A16,A17,
RELAT_1:187;
A20: dom Sgm dom q1 = dom (q3 \/ q4) by A7,A9,FINSEQ_1:100
.= dom q3 \/ dom q4 by XTUPLE_0:23;
A21: q1|rng((Sgm dom q1)|dom q3) \/ q1|rng((Sgm dom q1)|dom q4)
= q1|(rng((Sgm dom q1)|dom q3) \/ rng((Sgm dom q1)|dom q4)) by RELAT_1:78
.= q1|((Sgm dom q1).:(dom q3 \/ dom q4)) by A17,A18,RELAT_1:120
.= q1|rng((Sgm dom q1)|(dom Sgm dom q1)) by A20,RELAT_1:115
.= q1|rng Sgm dom q1
.= q1|dom q1 by FINSEQ_1:50
.= q1;
A22: q1 c= C1 by A3,XBOOLE_1:7;
A23: q1|rng((Sgm dom q1)|dom q3) c= q1 by A21,XBOOLE_1:7;
A24: q1|rng((Sgm dom q1)|dom q4) c= q1 by A21,XBOOLE_1:7;
rng C1 = rng q1 \/ rng q2 by A3,RELAT_1:12;
then
A25: rng q1 c= rng C1 by XBOOLE_1:7;
A26: rng q1 = rng Seq q1 by FINSEQ_1:101;
A27: rng Seq q1 c= rng C1 by A25,FINSEQ_1:101;
A28: rng Seq q1 = rng q3 \/ rng q4 by A7,A9,RELAT_1:12;
then
A29: rng q3 c= rng Seq q1 by XBOOLE_1:7;
rng q3 = rng Seq q3 by FINSEQ_1:101;
then
A30: rng Seq q3 c= rng C1 by A27,A29;
A31: rng q4 c= rng Seq q1 by A28,XBOOLE_1:7;
rng q4 = rng Seq q4 by FINSEQ_1:101;
then
A32: rng Seq q4 c= rng C1 by A27,A31;
reconsider q5 = q1|rng((Sgm dom q1)|dom q3),
q6 = q1|rng((Sgm dom q1)|dom q4) as FinSubsequence;
reconsider fs = C1 as FinSequence of rng C1 by FINSEQ_1:def 4;
reconsider fs1 = Seq q1 as FinSequence of rng C1 by A25,A26,FINSEQ_1:def 4;
reconsider fs2 = Seq q3 as FinSequence of rng C1 by A30,FINSEQ_1:def 4;
reconsider fs3 = Seq q4 as FinSequence of rng C1 by A32,FINSEQ_1:def 4;
reconsider fss = q1, fss1 = q5, fss2 = q6 as Subset of fs
by A22,A23,A24,XBOOLE_1:1;
reconsider fss3 = q3, fss4 = q4 as Subset of fs1 by A7,A9,XBOOLE_1:7;
A33: Seq fss3 = fs2;
fss1 = fss|rng((Sgm dom fss)|dom fss3);
then
A34: Seq q3 = Seq q5 by A33,FINSEQ_6:154;
A35: Seq fss4 = fs3;
A36: fss2 = fss|rng((Sgm dom fss)|dom fss4);
q1 /\ q2 = {} by A4;
then
A37: q5 /\ q2 \/ q6 /\ q2 = {} by A21,XBOOLE_1:23;
then
A38: q5 /\ q2 = {};
q6 /\ q2 = {} by A37;
then
A39: q6 misses q2;
A40: q1 c= C1 by A3,XBOOLE_1:7;
A41: q2 c= C1 by A3,XBOOLE_1:7;
q6 c= q1 by A21,XBOOLE_1:7;
then q6 c= C1 by A40;
then
A42: dom q6 misses dom q2 by A39,A41,FUNCT_1:112;
then reconsider q7 = q6 \/ q2 as Function by GRFUNC_1:13;
A43: dom C1 = dom q1 \/ dom q2 by A3,XTUPLE_0:23
.= (dom q5 \/ dom q6) \/ dom q2 by A21,XTUPLE_0:23
.= dom q5 \/ (dom q6 \/ dom q2) by XBOOLE_1:4
.= dom q5 \/ dom q7 by XTUPLE_0:23;
then
A44: dom q7 c= dom C1 by XBOOLE_1:7;
A45: dom C1 = Seg len C1 by FINSEQ_1:def 3;
then reconsider q7 as FinSubsequence by A44,FINSEQ_1:def 12;
A46: C1 = q5 \/ q7 by A3,A21,XBOOLE_1:4;
A47: q5 /\ q7 = q5 /\ q6 \/ q5 /\ q2 by XBOOLE_1:23;
q5 /\ q6 = {} by A19;
then
A48: q5 misses q7 by A38,A47;
A49: rng Seq q7 = rng q7 by FINSEQ_1:101;
rng C1 = rng q7 \/ rng q5 by A46,RELAT_1:12;
then
A50: rng Seq q7 c= rng C1 by A49,XBOOLE_1:7;
rng C1 c= N by FINSEQ_1:def 4;
then rng Seq q7 c= N by A50;
then Seq q7 is FinSequence of N by FINSEQ_1:def 4;
then reconsider C3 = Seq q7 as firing-sequence of N by FINSEQ_1:def 11;
A51: dom Seq q7 = Seg len Seq q7 by FINSEQ_1:def 3;
A52: dom (q6*Sgm dom q7) c= dom Sgm dom q7 by RELAT_1:25;
A53: dom (q2*Sgm dom q7) c= dom Sgm dom q7 by RELAT_1:25;
A54: dom (q6*Sgm dom q7) c= dom Seq q7 by A52,FINSEQ_1:100;
dom (q2*Sgm dom q7) c= dom Seq q7 by A53,FINSEQ_1:100;
then reconsider q8 = q6*Sgm dom q7, q9 = q2*Sgm dom q7 as FinSubsequence
by A51,A54,FINSEQ_1:def 12;
A55: C3 = q7*Sgm dom q7 by FINSEQ_1:def 14
.= q8 \/ q9 by RELAT_1:32;
A56: dom q8 = (Sgm dom q7)"dom q6 by RELAT_1:147;
A57: dom q9 = (Sgm dom q7)"dom q2 by RELAT_1:147;
dom q2 /\ dom q6 = {} by A42;
then (Sgm dom q7)"(dom q6 /\ dom q2) = {};
then (Sgm dom q7)"dom q6 /\ (Sgm dom q7)"dom q2 = {} by FUNCT_1:68;
then
A58: (Sgm dom q7)"dom q6 misses (Sgm dom q7)"dom q2;
A59: dom q6 c= dom q6 \/ dom q2 by XBOOLE_1:7;
A60: dom q2 c= dom q6 \/ dom q2 by XBOOLE_1:7;
A61: dom q6 c= dom q7 by A59,XTUPLE_0:23;
A62: dom q2 c= dom q7 by A60,XTUPLE_0:23;
A63: dom q6 c= rng Sgm dom q7 by A61,FINSEQ_1:50;
A64: dom q2 c= rng Sgm dom q7 by A62,FINSEQ_1:50;
A65: dom q8 = (Sgm dom q7)"dom q6 by RELAT_1:147;
A66: dom q9 = (Sgm dom q7)"dom q2 by RELAT_1:147;
A67: rng ((Sgm dom q7)|dom q8) = rng ((dom q6)|`(Sgm dom q7))
by A65,FUNCT_1:113
.= dom q6 by A63,RELAT_1:89;
A68: dom q8 c= dom Sgm dom q7 by RELAT_1:25;
A69: dom q9 c= dom Sgm dom q7 by RELAT_1:25;
A70: (Sgm dom q7)*(Sgm dom q8) = Sgm rng ((Sgm dom q7)|dom q8)
by A43,A45,A68,FINSEQ_6:129,XBOOLE_1:7;
A71: Seq q8 = (q6*Sgm dom q7)*(Sgm dom q8) by FINSEQ_1:def 14
.= q6*((Sgm dom q7)*(Sgm dom q8)) by RELAT_1:36
.= Seq q6 by A67,A70,FINSEQ_1:def 14;
A72: rng ((Sgm dom q7)|dom q9) = rng ((dom q2)|`(Sgm dom q7))
by A66,FUNCT_1:113
.= dom q2 by A64,RELAT_1:89;
A73: (Sgm dom q7)*(Sgm dom q9) = Sgm rng ((Sgm dom q7)|dom q9)
by A43,A45,A69,FINSEQ_6:129,XBOOLE_1:7;
A74: Seq q9 = (q2*Sgm dom q7)*(Sgm dom q9) by FINSEQ_1:def 14
.= q2*((Sgm dom q7)*(Sgm dom q9)) by RELAT_1:36
.= Seq q2 by A72,A73,FINSEQ_1:def 14;
Seq q8 in R2 by A12,A35,A36,A71,FINSEQ_6:154;
then ex ss1,ss2 being FinSubsequence st C3 = ss1 \/ ss2 & ss1 misses ss2 & Seq
ss1 in R2 & Seq ss2 in R3 by A6,A55,A56,A57,A58,A74,RELAT_1:179;
then Seq q7 in R2 concur R3;
hence thesis by A1,A11,A34,A46,A48;
end;
let x be object;
assume x in R1 concur (R2 concur R3);
then consider C1 such that
A75: x = C1 and
A76: ex q1,q2 st C1 = q1 \/ q2 & q1 misses q2 & Seq q1 in R1 & Seq q2 in
R2 concur R3;
consider q1,q2 such that
A77: C1 = q1 \/ q2 and
A78: q1 misses q2 and
A79: Seq q1 in R1 and
A80: Seq q2 in R2 concur R3 by A76;
consider C2 such that
A81: Seq q2 = C2 and
A82: ex q3,q4 st C2 = q3 \/ q4 & q3 misses q4 & Seq q3 in R2 & Seq q4 in
R3
by A80;
consider q3,q4 such that
A83: C2 = q3 \/ q4 and
A84: q3 misses q4 and
A85: Seq q3 in R2 and
A86: Seq q4 in R3 by A82;
consider n1 being Nat such that
A87: dom q2 c= Seg n1 by FINSEQ_1:def 12;
A88: q3 c= Seq q2 by A81,A83,XBOOLE_1:7;
A89: q4 c= Seq q2 by A81,A83,XBOOLE_1:7;
Sgm dom q2 is one-to-one by A87,FINSEQ_3:92;
then
A90: (Sgm dom q2).:dom q3 misses (Sgm dom q2).:dom q4
by A84,A88,A89,FUNCT_1:66,112;
A91: rng ((Sgm dom q2)|dom q3) = (Sgm dom q2).:dom q3 by RELAT_1:115;
A92: rng ((Sgm dom q2)|dom q4) = (Sgm dom q2).:dom q4 by RELAT_1:115;
then
A93: q2|rng((Sgm dom q2)|dom q3) misses q2|rng((Sgm dom q2)|dom q4)
by A90,A91,RELAT_1:187;
A94: dom Sgm dom q2 = dom Seq q2 by FINSEQ_1:100
.= dom q3 \/ dom q4 by A81,A83,XTUPLE_0:23;
A95: q2|rng((Sgm dom q2)|dom q3) \/ q2|rng((Sgm dom q2)|dom q4)
= q2|(rng((Sgm dom q2)|dom q3) \/ rng ((Sgm dom q2)|dom q4)) by RELAT_1:78
.= q2|((Sgm dom q2).:(dom q3 \/ dom q4)) by A91,A92,RELAT_1:120
.= q2|rng((Sgm dom q2)|(dom Sgm dom q2)) by A94,RELAT_1:115
.= q2|rng Sgm dom q2
.= q2|dom q2 by FINSEQ_1:50
.= q2;
A96: q2 c= C1 by A77,XBOOLE_1:7;
A97: q2|rng((Sgm dom q2)|dom q3) c= q2 by A95,XBOOLE_1:7;
A98: q2|rng((Sgm dom q2)|dom q4) c= q2 by A95,XBOOLE_1:7;
rng C1 = rng q1 \/ rng q2 by A77,RELAT_1:12;
then
A99: rng q2 c= rng C1 by XBOOLE_1:7;
A100: rng q2 = rng Seq q2 by FINSEQ_1:101;
A101: rng Seq q2 c= rng C1 by A99,FINSEQ_1:101;
A102: rng Seq q2 = rng q3 \/ rng q4 by A81,A83,RELAT_1:12;
then
A103: rng q3 c= rng Seq q2 by XBOOLE_1:7;
rng q3 = rng Seq q3 by FINSEQ_1:101;
then
A104: rng Seq q3 c= rng C1 by A101,A103;
A105: rng q4 c= rng Seq q2 by A102,XBOOLE_1:7;
rng q4 = rng Seq q4 by FINSEQ_1:101;
then
A106: rng Seq q4 c= rng C1 by A101,A105;
reconsider q5 = q2|rng((Sgm dom q2)|dom q3),
q6 = q2|rng((Sgm dom q2)|dom q4) as FinSubsequence;
reconsider fs = C1 as FinSequence of rng C1 by FINSEQ_1:def 4;
reconsider fs1 = Seq q2 as FinSequence of rng C1 by A99,A100,FINSEQ_1:def 4;
reconsider fs2 = Seq q3 as FinSequence of rng C1 by A104,FINSEQ_1:def 4;
reconsider fs3 = Seq q4 as FinSequence of rng C1 by A106,FINSEQ_1:def 4;
reconsider fss = q2, fss1 = q5, fss2 = q6 as Subset of fs by A96,A97,A98,
XBOOLE_1:1;
reconsider fss3 = q3, fss4 = q4 as Subset of fs1 by A81,A83,XBOOLE_1:7;
A107: Seq fss3 = fs2;
A108: fss1 = fss|rng((Sgm dom fss)|dom fss3 );
A109: Seq fss4 = fs3;
fss2 = fss|rng((Sgm dom fss)|dom fss4 );
then
A110: Seq q4 = Seq q6 by A109,FINSEQ_6:154;
q1 /\ q2 = {} by A78;
then
A111: q1 /\ q5 \/ q1 /\ q6 = {} by A95,XBOOLE_1:23;
then
A112: q1 /\ q5 = {};
A113: q1 /\ q6 = {} by A111;
A114: q1 misses q5 by A112;
A115: q1 c= C1 by A77,XBOOLE_1:7;
A116: q2 c= C1 by A77,XBOOLE_1:7;
q5 c= q2 by A95,XBOOLE_1:7;
then q5 c= C1 by A116;
then
A117: dom q1 misses dom q5 by A114,A115,FUNCT_1:112;
then reconsider q7 = q1 \/ q5 as Function by GRFUNC_1:13;
A118: dom C1 = dom q1 \/ dom q2 by A77,XTUPLE_0:23
.= dom q1 \/ (dom q5 \/ dom q6) by A95,XTUPLE_0:23
.= (dom q1 \/ dom q5) \/ dom q6 by XBOOLE_1:4
.= dom q7 \/ dom q6 by XTUPLE_0:23;
then
A119: dom q7 c= dom C1 by XBOOLE_1:7;
A120: dom C1 = Seg len C1 by FINSEQ_1:def 3;
then reconsider q7 as FinSubsequence by A119,FINSEQ_1:def 12;
A121: C1 = q7 \/ q6 by A77,A95,XBOOLE_1:4;
A122: q7 /\ q6 = q1 /\ q6 \/ q5 /\ q6 by XBOOLE_1:23;
q5 /\ q6 = {} by A93;
then
A123: q7 misses q6 by A113,A122;
A124: rng Seq q7 = rng q7 by FINSEQ_1:101;
rng C1 = rng q7 \/ rng q6 by A121,RELAT_1:12;
then
A125: rng Seq q7 c= rng C1 by A124,XBOOLE_1:7;
rng C1 c= N by FINSEQ_1:def 4;
then rng Seq q7 c= N by A125;
then Seq q7 is FinSequence of N by FINSEQ_1:def 4;
then reconsider C3 = Seq q7 as firing-sequence of N by FINSEQ_1:def 11;
A126: dom Seq q7 = Seg len Seq q7 by FINSEQ_1:def 3;
A127: dom (q1*Sgm dom q7) c= dom Sgm dom q7 by RELAT_1:25;
A128: dom (q5*Sgm dom q7) c= dom Sgm dom q7 by RELAT_1:25;
A129: dom (q1*Sgm dom q7) c= dom Seq q7 by A127,FINSEQ_1:100;
dom (q5*Sgm dom q7) c= dom Seq q7 by A128,FINSEQ_1:100;
then reconsider q8 = q1*Sgm dom q7, q9 = q5*Sgm dom q7 as FinSubsequence
by A126,A129,FINSEQ_1:def 12;
A130: C3 = q7*Sgm dom q7 by FINSEQ_1:def 14
.= q8 \/ q9 by RELAT_1:32;
A131: dom q8 = (Sgm dom q7)"dom q1 by RELAT_1:147;
A132: dom q9 = (Sgm dom q7)"dom q5 by RELAT_1:147;
dom q1 /\ dom q5 = {} by A117;
then (Sgm dom q7)"(dom q1 /\ dom q5) = {};
then (Sgm dom q7)"dom q1 /\ (Sgm dom q7)"dom q5 = {} by FUNCT_1:68;
then
A133: (Sgm dom q7)"dom q1 misses (Sgm dom q7)"dom q5;
A134: dom q1 c= dom q1 \/ dom q5 by XBOOLE_1:7;
A135: dom q5 c= dom q1 \/ dom q5 by XBOOLE_1:7;
A136: dom q1 c= dom q7 by A134,XTUPLE_0:23;
A137: dom q5 c= dom q7 by A135,XTUPLE_0:23;
A138: dom q1 c= rng Sgm dom q7 by A136,FINSEQ_1:50;
A139: dom q5 c= rng Sgm dom q7 by A137,FINSEQ_1:50;
A140: dom q8 = (Sgm dom q7)"dom q1 by RELAT_1:147;
A141: dom q9 = (Sgm dom q7)"dom q5 by RELAT_1:147;
A142: rng ((Sgm dom q7)|dom q8) = rng ((dom q1)|`(Sgm dom q7))
by A140,FUNCT_1:113
.= dom q1 by A138,RELAT_1:89;
A143: dom q8 c= dom Sgm dom q7 by RELAT_1:25;
A144: dom q9 c= dom Sgm dom q7 by RELAT_1:25;
A145: (Sgm dom q7)*(Sgm dom q8) = Sgm rng ((Sgm dom q7)|dom q8)
by A118,A120,A143,FINSEQ_6:129,XBOOLE_1:7;
A146: Seq q8 = (q1*Sgm dom q7)*(Sgm dom q8) by FINSEQ_1:def 14
.= q1*((Sgm dom q7)*(Sgm dom q8)) by RELAT_1:36
.= Seq q1 by A142,A145,FINSEQ_1:def 14;
A147: rng ((Sgm dom q7)|dom q9) = rng ((dom q5)|`(Sgm dom q7))
by A141,FUNCT_1:113
.= dom q5 by A139,RELAT_1:89;
A148: (Sgm dom q7)*(Sgm dom q9) = Sgm rng ((Sgm dom q7)|dom q9)
by A118,A120,A144,FINSEQ_6:129,XBOOLE_1:7;
Seq q9 = (q5*Sgm dom q7)*(Sgm dom q9) by FINSEQ_1:def 14
.= q5*((Sgm dom q7)*(Sgm dom q9)) by RELAT_1:36
.= Seq q5 by A147,A148,FINSEQ_1:def 14;
then Seq q9 in R2 by A85,A107,A108,FINSEQ_6:154;
then ex ss1,ss2 being FinSubsequence st C3 = ss1 \/ ss2 & ss1 misses ss2 & Seq
ss1 in R1 & Seq ss2 in R2 by A79,A130,A131,A132,A133,A146,RELAT_1:179 ;
then Seq q7 in R1 concur R2;
hence thesis by A75,A86,A110,A121,A123;
end;
theorem
R1 before R2 c= R1 concur R2
proof
let x be object;
assume
A1: x in R1 before R2;
then reconsider C = x as firing-sequence of N;
consider C1,C2 such that
A2: x = C1^C2 and
A3: C1 in R1 and
A4: C2 in R2 by A1;
set q1 = C1, q2 = (len C1) Shift C2;
reconsider q1 as FinSequence;
A5: C = q1 \/ q2 by A2,VALUED_1:49;
A6: q1 misses q2 by VALUED_1:50;
A7: Seq q1 in R1 by A3,FINSEQ_3:116;
Seq q2 in R2 by A4,VALUED_1:46;
hence thesis by A5,A6,A7;
end;
theorem
R1 c= P1 & R2 c= P2 implies R1 before R2 c= P1 before P2
proof
assume that
A1: R1 c= P1 and
A2: R2 c= P2;
let x be object;
assume x in R1 before R2;
then ex C1,C2 st ( x = C1^C2)&( C1 in R1)&( C2 in R2);
hence thesis by A1,A2;
end;
theorem
R1 c= P1 & R2 c= P2 implies R1 concur R2 c= P1 concur P2
proof
assume that
A1: R1 c= P1 and
A2: R2 c= P2;
let x be object;
assume x in R1 concur R2;
then ex C st
x = C & ex q1,q2 being FinSubsequence st C = q1 \/ q2 & q1 misses q2 &
Seq q1 in R1 & Seq q2 in R2;
hence thesis by A1,A2;
end;
Lm2: for p1,p2 being FinSequence, q1,q2 being FinSubsequence st
q1 c= p1 & q2 c= p2 holds dom (q1 \/ len p1 Shift q2) c= dom (p1^p2)
proof
let p1,p2 be FinSequence, q1,q2 be FinSubsequence;
assume that
A1: q1 c= p1 and
A2: q2 c= p2;
A3: dom q1 c= dom p1 by A1,GRFUNC_1:2;
A4: dom q2 c= dom p2 by A2,GRFUNC_1:2;
let x be object;
assume x in dom (q1 \/ len p1 Shift q2);
then
A5: x in (dom q1 \/ dom (len p1 Shift q2)) by XTUPLE_0:23;
A6: dom (p1^p2) = Seg (len p1 + len p2) by FINSEQ_1:def 7;
A7: now
assume
A8: x in dom q1;
A9: dom p1 = Seg len p1 by FINSEQ_1:def 3;
len p1 <= len p1 + len p2 by INT_1:6;
then Seg len p1 c= Seg (len p1 + len p2) by FINSEQ_1:5;
hence thesis by A3,A6,A8,A9;
end;
now
assume
A10: x in dom (len p1 Shift q2);
A11: dom (len p1 Shift q2) c= dom (len p1 Shift p2)
proof
let x be object;
assume
A12: x in dom (len p1 Shift q2);
A13: dom (len p1 Shift p2) =
{k+len p1 where k is Nat: k in dom p2} by VALUED_1:def 12;
dom (len p1 Shift q2) =
{k+len p1 where k is Nat: k in dom q2} by VALUED_1:def 12;
then ex k being Nat st ( x = k+len p1)&( k in dom q2) by A12;
hence thesis by A4,A13;
end;
dom (p1^p2) = dom (p1 \/ len p1 Shift p2) by VALUED_1:49
.= dom p1 \/ dom (len p1 Shift p2) by XTUPLE_0:23;
then dom (len p1 Shift p2) c= dom (p1^p2) by XBOOLE_1:7;
then dom (len p1 Shift q2) c= dom (p1^p2) by A11;
hence thesis by A10;
end;
hence thesis by A5,A7,XBOOLE_0:def 3;
end;
Lm3: for p1 being FinSequence, q1,q2 being FinSubsequence st
q1 c= p1 holds q1 misses ((len p1) Shift q2) by VALUED_1:50,XBOOLE_1:63;
theorem
(R1 concur R2) before (P1 concur P2) c= (R1 before P1) concur (R2 before P2)
proof
let x be object;
assume x in (R1 concur R2) before (P1 concur P2);
then consider C1,C2 such that
A1: x = C1^C2 and
A2: C1 in R1 concur R2 and
A3: C2 in P1 concur P2;
consider C3 such that
A4: C1 = C3 and
A5: ex q1,q2 st C3 = q1 \/ q2 & q1 misses q2 & Seq q1 in R1 & Seq q2 in
R2
by A2;
consider q1,q2 such that
A6: C3 = q1 \/ q2 and
A7: q1 misses q2 and
A8: Seq q1 in R1 and
A9: Seq q2 in R2 by A5;
consider C4 being firing-sequence of N such that
A10: C2 = C4 and
A11: ex q3,q4 st C4 = q3 \/ q4 & q3 misses q4 & Seq q3 in P1 & Seq q4 in
P2
by A3;
consider q3,q4 such that
A12: C4 = q3 \/ q4 and
A13: q3 misses q4 and
A14: Seq q3 in P1 and
A15: Seq q4 in P2 by A11;
reconsider C = C1^C2 as firing-sequence of N;
reconsider q5 = len C1 Shift q3, q6 = len C1 Shift q4 as FinSubsequence;
A16: q1 c= C1 by A4,A6,XBOOLE_1:7;
A17: q2 c= C1 by A4,A6,XBOOLE_1:7;
A18: q3 c= C2 by A10,A12,XBOOLE_1:7;
A19: q4 c= C2 by A10,A12,XBOOLE_1:7;
A20: C1 c= C1^C2 by FINSEQ_6:10;
then
A21: q1 c= C1^C2 by A16;
A22: q2 c= C1^C2 by A17,A20;
reconsider ss = C2 as FinSubsequence;
A23: q5 c= len C1 Shift ss by A10,A12,VALUED_1:52,XBOOLE_1:7;
A24: q6 c= len C1 Shift ss by A10,A12,VALUED_1:52,XBOOLE_1:7;
A25: len C1 Shift C2 c= C1^C2 by VALUED_1:53;
then
A26: q5 c= C1^C2 by A23;
A27: q6 c= C1^C2 by A24,A25;
A28: dom q1 misses dom q5 by A16,A21,A26,Lm3,FUNCT_1:112;
dom q2 misses dom q6 by A17,A22,A27,Lm3,FUNCT_1:112;
then reconsider ss1 = q1 \/ q5, ss2 = q2 \/ q6 as Function by A28,GRFUNC_1:13
;
A29: dom C = Seg len C by FINSEQ_1:def 3;
A30: dom ss1 c= dom C by A16,A18,Lm2;
dom ss2 c= dom C by A17,A19,Lm2;
then reconsider ss1, ss2 as FinSubsequence by A29,A30,FINSEQ_1:def 12;
A31: ss1 \/ ss2 = q1 \/ (len C1 Shift q3) \/ q2 \/ (len C1 Shift q4)
by XBOOLE_1:4
.= (q1 \/ q2) \/ (len C1 Shift q3) \/ (len C1 Shift q4)
by XBOOLE_1:4
.= C1 \/ ((len C1 Shift q3) \/ (len C1 Shift q4))
by A4,A6,XBOOLE_1:4
.= C1 \/ (len C1 Shift C2) by A10,A12,A13,VALUED_1:55
.= C by VALUED_1:49;
A32: ss1 /\ q2 = q1 /\ q2 \/ (len C1 Shift q3) /\ q2 by XBOOLE_1:23;
ss1 /\ (len C1 Shift q4) = q1 /\ (len C1 Shift q4) \/ (len C1 Shift q3)
/\ (len C1 Shift q4) by XBOOLE_1:23;
then
A33: ss1 /\ ss2 = (q1 /\ q2 \/ (len C1 Shift q3) /\ q2) \/ (q1 /\
(len C1 Shift q4) \/ (len C1 Shift q3) /\ (len C1 Shift q4)) by A32,
XBOOLE_1:23;
A34: q1 /\ q2 = {} by A7;
A35: (len C1 Shift q3) misses q2 by A4,A6,Lm3,XBOOLE_1:7;
A36: q1 misses (len C1 Shift q4) by A4,A6,Lm3,XBOOLE_1:7;
A37: (len C1 Shift q3) /\ q2 = {} by A35;
A38: q1 /\ (len C1 Shift q4) = {} by A36;
dom q3 misses dom q4 by A13,A18,A19,FUNCT_1:112;
then dom (len C1 Shift q3) misses dom (len C1 Shift q4) by VALUED_1:54;
then (len C1 Shift q3) misses (len C1 Shift q4) by RELAT_1:179 ;
then ss1 /\ ss2 = {} by A33,A34,A37,A38;
then
A39: ss1 misses ss2;
A40: ex ss3 being FinSubsequence st ( ss3 = ss1)&( (Seq q1)^(Seq
q3) = Seq ss3) by A16,A18,VALUED_1:64;
A41: ex ss4 being FinSubsequence st ( ss4 = ss2)&( (Seq q2)^(Seq
q4) = Seq ss4) by A17,A19,VALUED_1:64;
A42: Seq ss1 in R1 before P1 by A8,A14,A40;
Seq ss2 in R2 before P2 by A9,A15,A41;
hence thesis by A1,A31,A39,A42;
end;
registration
let P, N;
let R1, R2 be non empty process of N;
cluster R1 concur R2 -> non empty;
coherence
proof
consider fs1 being object such that
A1: fs1 in R1 by XBOOLE_0:def 1;
consider fs2 being object such that
A2: fs2 in R2 by XBOOLE_0:def 1;
reconsider fs1, fs2 as firing-sequence of N by A1,A2;
reconsider C = fs1^fs2 as firing-sequence of N;
A3: C = fs1 \/ (len fs1 Shift fs2) by VALUED_1:49;
A4: fs1 misses (len fs1 Shift fs2) by VALUED_1:50;
A5: fs1 = Seq fs1 by FINSEQ_3:116;
Seq (len fs1 Shift fs2) in R2 by A2,VALUED_1:46;
then C in R1 concur R2 by A1,A3,A4,A5;
hence thesis;
end;
end;
begin :: Neutral process
definition
let P;
let N be Petri_net of P;
func NeutralProcess(N) -> non empty process of N equals
{<*>N};
coherence;
end;
definition
let P;
let N be Petri_net of P;
let t be Element of N;
func ElementaryProcess(t) -> non empty process of N equals
{<*t*>};
coherence;
end;
theorem
NeutralProcess(N) before R = R
proof
thus NeutralProcess(N) before R c= R
proof
let x be object;
assume x in (NeutralProcess(N) before R);
then consider C1,C such that
A1: x = C1^C and
A2: C1 in NeutralProcess(N) and
A3: C in R;
C1 = <*>N by A2,TARSKI:def 1;
hence thesis by A1,A3,FINSEQ_1:34;
end;
let x be object;
assume
A4: x in R;
then reconsider C = x as Element of N*;
A5: <*>N in NeutralProcess(N) by TARSKI:def 1;
x = (<*>N)^C by FINSEQ_1:34;
hence thesis by A4,A5;
end;
theorem
R before NeutralProcess(N) = R
proof
thus R before NeutralProcess N c= R
proof
let x be object;
assume x in R before NeutralProcess N;
then consider C1,C such that
A1: x = C1^C and
A2: C1 in R and
A3: C in NeutralProcess(N);
C = <*>N by A3,TARSKI:def 1;
hence thesis by A1,A2,FINSEQ_1:34;
end;
let x be object;
assume
A4: x in R;
then reconsider C = x as Element of N*;
A5: <*>N in NeutralProcess(N) by TARSKI:def 1;
x = C^(<*>N) by FINSEQ_1:34;
hence thesis by A4,A5;
end;
theorem
NeutralProcess(N) concur R = R
proof
thus NeutralProcess(N) concur R c= R
proof
let x be object;
assume x in NeutralProcess(N) concur R;
then consider C such that
A1: x = C and
A2: ex q1,q2 being FinSubsequence st C = q1 \/ q2 & q1 misses q2 & Seq
q1 in {<*>N} & Seq q2 in R;
consider q1,q2 being FinSubsequence such that
A3: C = q1 \/ q2
and q1 misses q2 and
A4: Seq q1 in {<*>N} and
A5: Seq q2 in R by A2;
Seq q1 = {} by A4,TARSKI:def 1;
then q1 = {} by FINSEQ_1:97;
hence thesis by A1,A3,A5,FINSEQ_3:116;
end;
let x be object;
assume
A6: x in R;
then reconsider C = x as firing-sequence of N;
reconsider q1 = <*>N, q2 = C as FinSubsequence;
A7: Seq q2 = C by FINSEQ_3:116;
A8: {} \/ q2 = C;
A9: Seq q1 = q1 by FINSEQ_3:116;
A10: q1 in {<*>N} by TARSKI:def 1;
q1 misses q2;
hence thesis by A6,A7,A8,A9,A10;
end;