let am, bp, cm, dp be non pair set ; :: thesis: for cin being set
for s being State of (BitFTA2Circ (am,bp,cm,dp,cin))
for a123, a5 being Element of BOOLEAN st a123 = s . (GFA2AdderOutput (am,bp,cm)) & a5 = s . cin holds
(Following s) . [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c] = a123 'xor' ('not' a5)
let cin be set ; :: thesis: for s being State of (BitFTA2Circ (am,bp,cm,dp,cin))
for a123, a5 being Element of BOOLEAN st a123 = s . (GFA2AdderOutput (am,bp,cm)) & a5 = s . cin holds
(Following s) . [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c] = a123 'xor' ('not' a5)
set S = BitFTA2Str (am,bp,cm,dp,cin);
set C = BitFTA2Circ (am,bp,cm,dp,cin);
set A1 = GFA2AdderOutput (am,bp,cm);
set A1cin = [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c];
let s be State of (BitFTA2Circ (am,bp,cm,dp,cin)); :: thesis: for a123, a5 being Element of BOOLEAN st a123 = s . (GFA2AdderOutput (am,bp,cm)) & a5 = s . cin holds
(Following s) . [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c] = a123 'xor' ('not' a5)
let a123, a5 be Element of BOOLEAN ; :: thesis: ( a123 = s . (GFA2AdderOutput (am,bp,cm)) & a5 = s . cin implies (Following s) . [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c] = a123 'xor' ('not' a5) )
assume A1: ( a123 = s . (GFA2AdderOutput (am,bp,cm)) & a5 = s . cin ) ; :: thesis: (Following s) . [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c] = a123 'xor' ('not' a5)
A2: dom s = the carrier of (BitFTA2Str (am,bp,cm,dp,cin)) by CIRCUIT1:3;
A3: ( GFA2AdderOutput (am,bp,cm) in the carrier of (BitFTA2Str (am,bp,cm,dp,cin)) & cin in the carrier of (BitFTA2Str (am,bp,cm,dp,cin)) ) by Th24;
InnerVertices (BitFTA2Str (am,bp,cm,dp,cin)) = the carrier' of (BitFTA2Str (am,bp,cm,dp,cin)) by FACIRC_1:37;
then [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c] in the carrier' of (BitFTA2Str (am,bp,cm,dp,cin)) by Th25;
hence (Following s) . [<*(GFA2AdderOutput (am,bp,cm)),cin*>,xor2c] = xor2c . (s * <*(GFA2AdderOutput (am,bp,cm)),cin*>) by FACIRC_1:35
.= xor2c . <*a123,a5*> by A1, A3, A2, FINSEQ_2:125
.= a123 'xor' ('not' a5) by GFACIRC1:def 4 ;
:: thesis: verum