Stephen J. Willson

Professor of Mathematics and University Professor
Mathematics Department
Iowa State University
Ames, IA 50011

Office: 411 Carver

Telephone: (515)-294-7671

FAX: (515)-294-5454


Spring 2015

Fall 2014

During Fall 2014 I am teaching no classes and I am often away from my office and out of town. I am not holding any regular office hours.
The best way to contact me is via e-mail: E-mail:

I'll be teaching again Spring 2015.

Information for Advisees
Because Professor Willson is on phased retirement and will be frequently unavailable, his undergraduate advisees have been assigned to other advisers.
Mathematics majors who were his advisees have been assigned to Professor Jim Wilson, with office 396D Carver, telephone 294-9816, and e-mail
BCBio majors who were his advisees have been assigned to Professor Michael Smiley, with office 458 Carver, telephone 294-6420, and e-mail


Professional experience:

Research interests:

Computational biology, especially building phylogenetic trees and networks. Supertrees. Game theory and fair division problems. Cellular automata. Fractals and chaotic dynamics.

Links for talks

Information on computational biology:

For more information about my work on building phylogenetic trees, click trees

To get my software for building phylogenetic trees, click software

For more information about the Laurence H. Baker Center for Bioinformatics and Biological Statistics click CBBS

Software in game theory:

Selected publications:


Pdf copy of my C.V.

Personal information:

My wife is Lee Anne Willson , who is a University Professor at Iowa State University in the Department of Physics and Astronomy . Her research typically involves mechanisms and implications of mass loss from stars, with particular emphasis on variable stars. My daughter, Kendra Willson, has interests in linguistics, Scandinavian, and dragons. My son, Jeffrey Willson, with substantial interests in physics, mathematics, music, and literature, is a graduate student in the Department of Physics and Astronomy at Iowa State University.

My recreations and hobbies include:

Here is how to find more information about the Mathematics Department at Iowa State University.

Last updated October 17, 2014.