bio | website | vmm.math.uci.edu |
---|---|---|
location | Univ. of California at Irvine | |
age | 83 | |
visits | member for | 4 years, 9 months |
seen | Mar 20 at 6:39 | |
stats | profile views | 6,972 |
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 .
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. |
Apr 10 |
answered | Fixed point theorems |
Apr 9 |
awarded | Civic Duty |
Mar 27 |
awarded | Nice Answer |
Feb 6 |
awarded | Enlightened |
Feb 6 |
awarded | Nice Answer |
Jan 13 |
comment |
Lie group action with no slice
@Yves Cormulier I don't think that's so Yves. If it were then even a compact group action wouldn't have a slice at an isolated fixed point p, whereas in fact an invariant neighborhood of p is a slice at p in that case. |
Jan 13 |
revised |
Lie group action with no slice
added 22 characters in body |
Jan 13 |
comment |
Lie group action with no slice
After thinking about my answer a bit I realized that an even simpler example is the action of the group Z of integers on the circle generated by rotation through an irrational angle. |