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arXiv · 2302.10129

Semisimple FJRW theory of polynomials with two variables

Amanda Francis·Weiqiang He·Yefeng Shen
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Abstract

We study the Dubrovin-Frobenius manifold in the Fan-Jarvis-Ruan-Witten theory of Landau-Ginzburg pairs $(W, \ )$, where $W$ is an invertible nondegenerate quasihomogeneous polynomial with two variables and $\ $ is the minimal admissible group of $W$. We conjecture that the Dubrovin-Frobenius manifolds from these FJRW theory are semisimple. We show the conjecture holds true for simple singularities and almost all Brieskorn-Pham polynomials. For Brieskorn-Pham polynomials, the result follows from the calculation of a quantum Euler class in the FJRW theory. As a consequence, our result shows that for the FJRW theory of these Landau-Ginzburg pairs, both a Dubrovin type conjecture and a Virasoro conjecture hold true.

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Amanda Francis, Weiqiang He, Yefeng Shen. 2026-06-11. Semisimple FJRW theory of polynomials with two variables. https://arxiv.org/abs/2302.10129

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