The $h$-vectors of toric ideals of odd cycle compositions revisited
Abstract
Let $G$ be a graph consisting of $s$ odd cycles that all share a common
vertex. Bhaskara, Higashitani, and Shibu Deepthi recently computed the
$h$-polynomial for the quotient ring $R/I_G$, where $I_G$ is the toric ideal of
$G$, in terms of the number and sizes of odd cycles in the graph. The purpose
of this note is to prove the stronger result that these toric ideals are
geometrically vertex decomposable, which allows us to deduce the result of
Bhaskara, Higashitani, and Shibu Deepthi about the $h$-polyhomial as a
corollary.