Professor of Mathematics
Department of Mathematics
The Ohio State University
100 Math Tower
231 West 18th Avenue
Columbus, OH 43210-1174
Telephone: 614-292-5583
Fax: 614-292-1479
e-mail: keyfitz.2@osu.edu
In January, 2009, I joined the Department of Mathematics at The Ohio State University, after 25 years at the University of Houston. From July 2004 until December 2008 I was Director of the Fields Institute for Research in Mathematical Sciences in Toronto, Canada. 
My research is in the field of nonlinear partial differential equations. I have studied systems of conservation laws which are nonstrictly hyperbolic or which change type from hyperbolic to elliptic in steady or unsteady flow. Systems with this behavior arise in models for multiphase flow in porous media, and in two-phase compressible and incompressible flow. With Suncica Canic and Eun Heui Kim, I began an analysis of self-similar solutions of systems of conservation laws in two space dimensions. Work with Katarina Jegdic and with Allen Tesdall has extended the study of multidimensional problems.
On October 1, 2009, I became President-Elect of the International Council on Industrial and Applied Mathematics (ICIAM). My term as President began October 1, 2011 and ended September 30, 2015. After two years as Past-President, I am now the Editor-in-Chief of the ICIAM Newsletter, ICIAM Dianoia.
Recent CV: my current vita
Click on the PAPERS link above to see some papers co-authored by Barbara Lee Keyfitz.
For more information about the OSU Mathematics Department, look at the Mathematics Department Home Page.