W. Johnson

collaborators

3 papers

math.CO2022

Exponential Hilbert series and hierarchical log-linear models

Wayne A. Johnson

Consider a hierarchical log-linear model, given by a simplicial complex, $Γ$ , and integer matrix $A_{Γ}$ . We give a new characterization of the rank of $A_{Γ}$ given by a logarithmic t…

math.RT2018

Exponential Hilbert series of equivariant embeddings

Wayne A. Johnson

In this article, we study properties of the exponential Hilbert series of a $G$ -equivariant projective variety, where $G$ is a semisimple, simply-connected complex linear algebraic…

math.RT2018

An orbit model for the spectra of nilpotent Gelfand pairs

Holley Friedlander, William Grodzicki, Wayne Johnson +4

Let $N$ be a connected and simply connected nilpotent Lie group, and let $K$ be a subgroup of the automorphism group of $N$ . We say that the pair $(K, N)$ is a nilpotent Gelfand pai…