Every man is, more or less, the sport of accident.
--James Fenimore Cooper

John Stembridge

Professor Emeritus of Mathematics, University of Michigan

My Mug
2020 1997

Perhaps someday, a young person will see this and ask Why was he wearing a mask?

What I Do

Algebraic combinatorics, mostly. Want more detail? Read my Research Profile.

I'm also a charter member of the Atlas of Lie Groups Project, whose goals are to understand, classify, and catalogue the representations of semisimple real and p-adic Lie groups. A surprising amount of the work we have done involves challenging combinatorial and computational problems--that's why I'm involved.

I maintain an archive of my recent papers and a publication list.

I also have an archive of other papers (i.e., papers not intended for publication).

Maple Packages

I'm the author of a collection of Maple packages for working with symmetric functions, posets, root systems, and finite Coxeter groups. Use this site as the official source for all information about SF, posets, and coxeter/weyl.

Here's a nifty example that was created with the posets and coxeter packages.

By popular demand, I also have created an archive of Research Data And Other Useful Stuff. To whet your appetite, here's a sample of the cool stuff you can find there:

E6 plane

A projection of the nearest neighbor graph of the E6 root system into its Coxeter plane.

Is That All There Is?

Of course not. Here you can find my new guide to hikes in Washtenaw and other nearby counties, and some of my favorite humorous quotations on a wide range of subjects.

How to Reach Me

Last modified Wed Oct 8 09:55:15 AM EDT 2025