let A be non empty set ; for f, g being Element of Funcs (A,REAL) holds (minfuncreal A) . (f,((maxfuncreal A) . (g,f))) = f
let f, g be Element of Funcs (A,REAL); (minfuncreal A) . (f,((maxfuncreal A) . (g,f))) = f
thus (minfuncreal A) . (f,((maxfuncreal A) . (g,f))) =
(minfuncreal A) . (f,((maxfuncreal A) . (f,g)))
by Th8
.=
f
by Th16
; verum