theorem Th31: :: CIRCCOMB:31

for S1, S2, S being non empty non void Circuit-like ManySortedSign st S = S1 +* S2 holds
for A1 being non-empty Circuit of S1
for A2 being non-empty Circuit of S2
for A being non-empty Circuit of S st A1 tolerates A2 & A = A1 +* A2 holds
for s being State of A
for v being Vertex of S holds
( ( for s1 being State of A1 st s1 = s | the carrier of S1 & ( v in InnerVertices S1 or ( v in the carrier of S1 & v in InputVertices S ) ) holds
(Following s) . v = (Following s1) . v ) & ( for s2 being State of A2 st s2 = s | the carrier of S2 & ( v in InnerVertices S2 or ( v in the carrier of S2 & v in InputVertices S ) ) holds
(Following s) . v = (Following s2) . v ) )