:: deftheorem Def6 defines -BitFTA0Layer2Str FTACELL2:def 6 :
for n being Nat
for ap, bp, cp, dp being FinSequence
for b₆ being non empty non void strict unsplit gate`1=arity gate`2isBoolean ManySortedSign holds
( b₆ = n -BitFTA0Layer2Str (ap,bp,cp,dp) iff ex g, h being ManySortedSet of NAT st
( b₆ = g . n & g . 0 = 1GateCircStr (<*>,((0 -tuples_on BOOLEAN) --> FALSE)) & h . 0 = [<*>,((0 -tuples_on BOOLEAN) --> FALSE)] & ( for k being Nat
for S being non empty ManySortedSign
for z being set st S = g . k & z = h . k holds
( g . (k + 1) = S +* (BitGFA0Str ((GFA0AdderOutput ((ap . (k + 1)),(bp . (k + 1)),(cp . (k + 1)))),z,(dp . (k + 1)))) & h . (k + 1) = GFA0CarryOutput ((ap . (k + 1)),(bp . (k + 1)),(cp . (k + 1))) ) ) ) );