:: deftheorem defines GFA2CarryStr GFACIRC1:def 31 :
for x, y, z being set holds GFA2CarryStr (x,y,z) = (GFA2CarryIStr (x,y,z)) +* (1GateCircStr (<*[<*x,y*>,and2a],[<*y,z*>,and2c],[<*z,x*>,nor2]*>,nor3));