On the bilinear and cubic forms of some symplectic connected sums

Let (M 1,M 2,N) be three symplectic manifolds and suppose that we can do the symplectic connected sum of M 1 and M 2 along their submanifold N to obtain M 1#N M 2. In this paper, we consider the bilinear and cubic forms of H*(M 1#N M 2, .) when dimM 1#N M 2 = 4, 6. Under some conditions, we get some relations of the bilinear and the cubic forms between M 1#N M 2 and M 1.M 2.