Classification of Nahm pole solutions of the Kapustin-Witten equations on $S^1\times \Sigma\times \mathbb{R}^+$

Abstract

In this note, we classify all solutions to the $\mathrm{SU(n)}$ Kapustin-Witten equations on $S^1\times\Sigma \times \mathbb{R}^+$, where $\Sigma$ is a compact Riemann surface, with Nahm pole singularity at $S^1\times\Sigma \times \{0\}$. We provide a similar classification of solutions with generalized Nahm pole singularities along a simple divisor (a "knot") in $S^1\times\Sigma \times \{0\}$.