Hochschild cohomology of Fermat type polynomials with non-abelian symmetries

Alexey Basalaev, Andrei Ionov

For a polynomial $f=x_1^n+\cdots +x_N^n$ let $G_f$ be the non--abelian maximal group of symmetries of $f$. This is a group generated by all $g\in \mathrm{GL}(N,\mathbb{C})$, r…