990 Lincoln Place Boulder, CO 80302 (970) 302-6315 (cell)I live in Boulder, Colorado, and teach at the University of Northern Colorado. My research is in geometry, logic, and formal reasoning with diagrams; you can find some of the papers that I've written here.
(Pictures: climbing Longs Peak, July 2007; playing the cello, Jan.
2000; and sitting in my garden, Summer 1997.)
Last updated: 11/8/17