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 .

May
24
awarded  Notable Question
May
24
awarded  Nice Answer
May
22
comment Why don't more mathematicians improve Wikipedia articles?
@Mark M YES! That is a very good approximation of what I was asking for. Thanks for telling me about it. It is now one of my "pinned" tabs and I will try to help with the project.
May
22
answered Why don't more mathematicians improve Wikipedia articles?
May
17
comment Are there proofs that you feel you did not “understand” for a long time?
How about the proof that Einstein is said to have (re)discovered as a teen-ager? It is clear that the areas of similar right triangles is proportional to the squares of corresponding sides---in particular to the squares of their hypotenuses. Dropping a perpendicular from the vertex of the right triangle onto the hypotenuse c divides it into two similar triangles with hypotenuses a and b, hence: kc^2 = ka^2 + k*b^2 so c^2 = a^2 + b^2
May
10
awarded  Nice Answer
May
2
answered A simple and good reference about solitons
May
1
answered Does a *topological* manifold have an exhaustion by compact submanifolds with boundary?
Apr
27
awarded  Nice Answer
Apr
26
awarded  Good Answer
Apr
20
awarded  Necromancer
Apr
20
comment Which hard mathematical problems do you have to solve to earn bitcoins ?
Is it known whether there is an algorithm using a quantum computer (i.e., qubits instead of bits) for simplifying the Bitcoin mining?
Apr
19
answered What are the invariant Pseudo-differential operators on a Lie group?
Apr
19
revised Great mathematics books by pre-modern authors
corrected misspelling
Apr
19
answered Great mathematics books by pre-modern authors
Apr
18
awarded  Nice Answer
Apr
17
answered Is rigour just a ritual that most mathematicians wish to get rid of if they could?
Apr
15
answered Old books still used
Apr
11
revised Fixed point theorems
A more general example
Apr
11
comment Fixed point theorems
...has a unique solution, provided ε is sufficiently small.