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Instanton counting and Donaldson invariants

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arxiv math/0606180 v2 pith:NB3XMVII submitted 2006-06-08 math.AG hep-thmath.DG

classification math.AGhep-thmath.DG
keywords donaldsoninvariantsmathconjectureconnectedfunctionhep-thnekrasov
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abstract

For a smooth projective toric surface we determine the Donaldson invariants and their wallcrossing in terms of the Nekrasov partition function. Using the solution of the Nekrasov conjecture math.AG/0306198, hep-th/0306238, math.AG/0409441 and its refinement math.AG/0311058, we apply this result to give a generating function for the wallcrossing of Donaldson invariants of good walls of simply connected projective surfaces with $b_+=1$ in terms of modular forms. This formula was proved earlier in alg-geom/9506018 more generally for simply connected 4-manifolds with $b_+=1$, assuming the Kotschick-Morgan conjecture and it was also derived by physical arguments in hep-th/9709193.

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Cited by 2 Pith papers

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  1. Instantons from Blow-up

    hep-th 2019-08 conditional novelty 7.0 of 10

    The instanton partition function of many 4d N=2 and 5d N=1 gauge theories is fully determined by the perturbative part via generalized Nakajima-Yoshioka blowup equations.

  2. Contour Integral for the Partition Function of $\mathcal{N}=2$ Topologically Twisted on $\mathbb{CP}^2$ and Physical Fluxes

    hep-th 2025-10 conditional novelty 6.0 of 10

    Derives a single-flux contour-integral formula for the N=2 twisted SU(2) partition function on CP^2 and new equivariant invariants reducing to Donaldson invariants.

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