Modular forms and Donaldson invariants for 4-manifolds with $b_+=1$

Details Modular forms and Donaldson invariants for 4-manifolds with $b_+=1$ Modular forms and Donaldson invariants for 4-manifolds with $b_+=1$

1995-06-23

arxiv.org/abs/alg-geom/9506018v2

Mathematics

Algebraic Geometry

I correct a number of missing attributions and citations. In particular this applies to the cited paper of Kotschick and Lisca

Scientific paper

We study the Donaldson invariants of simply connected $4$-manifolds with $b_+=1$, and in particular the change of the invariants under wall-crossing. We assume the conjecture of Kotschick and Morgan about the shape of the wall-crossing terms (which Oszva\'th and Morgan are now able to prove), and are determine a generating function for the wall-crossing terms in terms of modular forms. As an application we determine all the Donaldson invariants of the projective plane in terms of modular forms. The main tool are the blowup formulas, which are used to obtain recursive relations.

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