Rhombic tiling, permutation plot, subset gamegraph, permutahedron, hyperplane arrangement, structure diagram, three-dimensional heap, Cayley diagram, braid graph, and L-tromino tiling.

Adel Mathematics Building

It’s my 45th first day of school! In 1997, I started as a grad student at NAU. At that time, I was in my early 20s, had bleached hair, a soul patch, and wore overalls. And now, at age 50, with less hair, I’m Department Chair. Such a weird feeling!