2 problems

Gedeon–Proudfoot–Young's conjecture. For every equivariant matroid $W\curvearrowright M$, both the equivariant characteristic polynomial and the equivariant Kazhdan–Lusztig polynom…

Let $M$ be a matroid equipped with an action of a group $\Gamma$, and let $Z_M^\Gamma(t)=\bigoplus_i V_i t^i$ be its equivariant $Z$-polynomial, viewed as a graded virtual represen…