Relation between regularity of powers of edge ideals and (im, reg)-invariant extension

Abstract

In this paper, we define (im, reg)-invariant extension of graphs and propose a new approach for Nevo and Peeva's conjecture which said that for any gap-free graph $G$ with $reg(I(G))=3$ and for any $k\ge 2$, $I(G{)}^k$ has a linear resolution. Moreover, we consider new conjectures related to the regularity of powers of edge ideals of gap-free graphs.

7 pages