10,907 reputation
24876
bio website vmm.math.uci.edu
location Univ. of California at Irvine
age 84
visits member for 5 years, 2 months
seen May 14 at 20:21
I'm a Professor at UC Irvine, but spent most of my career at Brandeis. My research areas: Differential Topology, Transformation Groups, and Global Analysis. Recently I developed a math visualization program, 3D-XplorMath, freely available at http://3D-XplorMath.org) and a companion website, the Virtual Math Museum at http://VirtualMathMuseum.org. Last year I co-authored a differential equations text with my son Bob, most of which is downloadable from http://ode-math.com .

Jul
15
awarded  Good Answer
Jul
15
awarded  Critic
Jul
15
comment Direct proof of irrationality?
Sure, I realized "my" answer (of course it really is NOT original with me) was not exactly what the the OP asked for. However this proof is so completely elementary---even for the final part, you only have to know what a monic polynomial means---that I thought it might appeal to many readers who looked at this question.
Jul
15
revised Direct proof of irrationality?
added 1 characters in body
Jul
15
comment Direct proof of irrationality?
Ye, Andres, thanks, don't know what the problem was but it's fixed now.
Jul
15
answered Direct proof of irrationality?
Jul
12
awarded  Nice Answer
Jul
11
answered What is the situation with Hilbert's Fifth Problem ?
Jul
10
answered Global description of the Levi-Civita connection
Jul
10
answered Exponential map and covariant derivative
Jul
10
revised Shortest-path Distances Determining the Metric?
added 86 characters in body; deleted 65 characters in body
Jul
10
answered Shortest-path Distances Determining the Metric?
Jul
9
answered $C^1$ isometric embedding of flat torus into $\mathbb{R}^3$
Jul
8
awarded  Supporter
Jul
8
answered Action of the group of isometries on a manifold
Jul
5
awarded  Necromancer
Jul
5
revised What is an integrable system
changed math to TeX markup for greater clarity
Jul
5
revised What is an integrable system
added details concerning Poisson brackets
Jul
5
awarded  Editor
Jul
5
revised What is an integrable system
added 237 characters in body; added 37 characters in body