theorem Th112: :: GFACIRC1:112

for x, y, z being set holds
( [<*x,y*>,nor2] in InnerVertices (GFA3CarryStr (x,y,z)) & [<*y,z*>,nor2] in InnerVertices (GFA3CarryStr (x,y,z)) & [<*z,x*>,nor2] in InnerVertices (GFA3CarryStr (x,y,z)) & GFA3CarryOutput (x,y,z) in InnerVertices (GFA3CarryStr (x,y,z)) )