Mirror map for Fermat polynomial with non-abelian group of symmetries

Abstract

We study Landau-Ginzburg orbifolds $(f,G)$ with $f=x_1^n+\dots +x_N^n$ and $G=S⋉G^d$, where $S\subseteq S_N$ and $G^d$ is either the maximal group of scalar symmetries of $f$ or the intersection of the maximal diagonal symmetries of $f$ with ${\mathrm{SL}}_N(\mathbb{C})$. We construct a mirror map between the corresponding phase spaces and prove that it is an isomorphism restricted to a certain subspace of the phase space when $n=N$ is a prime number. When $S$ satisfies the condition PC of Ebeling and Gusein-Zade this subspace coincides with the full space. We also show that two phase spaces are isomorphic for $n=N=5$.

typos fixed, journal version

Cited by in corpus (2)

• Hodge diamonds of the Landau--Ginzburg orbifolds
• Mirror partner for a Klein quartic polynomial