## Gauge theoretical equivariant Gromov-Witten invariants and the full Seiberg-Witten invariants of ruled surfaces.(English)Zbl 1037.57025

It was first observed by I. Mundet i Riera in [Oxford University Ph.D. thesis (1999), Topology 42, 525–553 (2003; Zbl 1032.53079)] and by K. Cieliebak, A. R. Gaio and D. A. Salamon [Int. Math. Res. Not. 2000, No. 16, 831–882 (2000; Zbl 1083.53084)] that the machinery developed for the gauge theoretic equations known as the vortex equations can (in principle) be adapted to produce an interesting generalization of the Gromov-Witten invariants for symplectic manifolds. The novelty comes from replacing a symplectic manifold by a symplectic (in fact Kähler) fibration over a Kähler manifold. The invariants are defined for data sets $$(\hat{K},\hat{P},F)$$, where $$\hat{K}$$ is a compact Lie group, $$\hat{P}$$ is a principal $$\hat{K}$$-bundle over a closed Riemann surface, and $$F$$ is a symplectic manifold with a Hamiltonian $$\hat{K}$$-action. Like all gauge-theoretic invariants, they are extracted from a moduli space of solutions to a set of non-linear partial differential equations. In this case the equations are a generalization of the vortex equations.
In this paper the authors discuss a further generalization in which in addition to the group $$\hat{K}$$, a normal subgroup $$K\subset\hat{K}$$ is specified. They mostly consider the special case in which $$\hat{K}=U(r)\times U(r_0)$$, $$K=U(r_0)$$, and $$F=Hom(\mathbb{C}^r\times \mathbb{C}^{r_0})$$. Moreover, the case $$r=1$$ is the only case in which any detailed computation of resulting invariants is attempted. There is a comparison with Seiberg-Witten type invariants of a ruled surface defined by the authors in [Int. J. Math. 7, 811–832 (1996; Zbl 0959.57029)].

### MSC:

 57R57 Applications of global analysis to structures on manifolds 53D45 Gromov-Witten invariants, quantum cohomology, Frobenius manifolds

### Citations:

Zbl 1032.53079; Zbl 1083.53084; Zbl 0959.57029
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