Surgery formula for Seiberg-Witten invariants of negative definite plumbed 3-manifolds

We derive a cut-and-paste surgery formula of Seiberg-Witten invariants for negative definite plumbed rational homology 3-spheres. It is similar to ( and motivated by) Okuma's recursion formula [ 27], 4.5, targeting analytic invariants of splice-quotient singularities. Combining the two formulas automatically provides a proof of the equivariant version [ 11], 5.2(b), of the Seiberg-Witten invariant conjecture [ 18] for these singularities.