## Welcome

I am a member of the algebra group at the Mathematics Department of Temple University. My research is in **noncommutative algebra**, with particular emphasis on
representation theory and invariant theory
(Google Citations,
Mathematical Genealogy).
For about ten years,
I focused on **multiplicative invariant theory**.
My monograph with that title appeared in 2005. Subsequently, I
worked on applications of Koszul algebras to algebraic combinatorics,
algebraic group actions on noncommutative spaces, and representations of
Hopf algebras.
In 2018, I published a
graduate textbook on
**representation theory**.