Publications Books Curriculum Vita ( 2022) The math I do. Since 1998 I've worked mostly on the classical N-body problem . I was trained in geometric mechanics . The Falling Cat problem , which I worked on from 1988-96, led me into Geometric (Berry's) phases , subRiemannian geometry , optimal control theory , and eventually to the three-body problem. I continue to work from time-to-time in these other areas. unpublished math recommended math books . classes taught.

Short Story-Essays I like to write. Beautiful web sites quotes I paddle and love being on rivers:

N-body solutions animated subRiemannian Falling Cats they did the coin flip experiment! (posted Oct 12, 2023 ) video. slides. audio. of or by me. Open Problem Lists Nonlinearity Collaborators Ph.D. Student Ph.D. student theses