Regular Dilation on Graph Products of $\mathbb{N}$

Abstract

We extended the definition of regular dilation to graph products of $\mathbb{N}$, which is an important class of quasi-lattice ordered semigroups. Two important results in dilation theory are unified under our result: namely, Brehmer's regular dilation on ${\mathbb{N}}^k$ and Frazho-Bunce-Popescu's dilation of row contractions. We further show that a representation of a graph product has an isometric Nica-covariant dilation if and only if it is $\ast$-regular. A special case of our result was considered by Popescu, and we studied the connection with Popescu's work.

36 pages, accepted by Journal of Functional Analysis

References in corpus (1)

• Poisson transform for higher-rank graph algebras and its applications