Regularity of powers of cover ideals of unimodular hypergraphs

Nguyen Thu Hang, Tran Nam Trung

Let $\H$ be a unimodular hypergraph over the vertex set $[n]$ and let $J(\stackrel{˝}{)}$ be the cover ideal of $\H$ in the polynomial ring $R=K[x_1,\dots ,x_n]$. We show that $\reg J(\H)^s$ i…