theorem Th83: :: GFACIRC1:83

for x, y, z being set
for s being State of (GFA2CarryCirc (x,y,z))
for a1, a2, a3 being Element of BOOLEAN st a1 = s . x & a2 = s . y & a3 = s . z holds
( (Following s) . [<*x,y*>,and2a] = ('not' a1) '&' a2 & (Following s) . [<*y,z*>,and2c] = a2 '&' ('not' a3) & (Following s) . [<*z,x*>,nor2] = ('not' a3) '&' ('not' a1) )