Whitham Deformations and Tau Functions in N = 2 Supersymmetric Gauge Theories

Abstract

We review new aspects of integrable systems discovered recently in N=2 supersymmetric gauge theories and their topologically twisted versions. The main topics are (i) an explicit construction of Whitham deformations of the Seiberg-Witten curves for classical gauge groups, (ii) its application to contact terms in the u-plane integral of topologically twisted theories, and (iii) a connection between the tau functions and the blowup formula in topologically twisted theories.

25pages, latex2e; (v2) final version for publication, minor errors corrected

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