Graph Theory?
Question: Authentication of a graph over six vertices of odd degree can not be decomposed into three parts.
Answer: I do not trust it. there must be some additional restrictions on the decomposition.
Let V = (A1, A2, A3, B1, B2, B3, C1, C2, C3)
with edges and AiBi BiCi for i = 1,2,3
A2B1 + and A2B3
The decomposition is A = (A1, A2, A3), B = (B1, B2, B3), C = (C1, C2, C3)
without thorn between members of the same coin.









