## 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 topics related to transformation groups and invariant theory. For about ten years, I focused on **multiplicative invariant theory**. My monograph with that title appeared in 2005. Subsequently, I have worked on applications of Koszul algebras to algebraic combinatorics, algebraic group actions on noncommutative spaces, and representations of finite Hopf algebras.
I just finished writing a
graduate textbook on
**representation theory**.

Here are the links to my Google Citations and my Mathematical Genealogy.