3,981 reputation
2145
bio website quora.com/Alon-Amit
location Los Altos, CA
age 45
visits member for 5 years, 1 month
seen 2 days ago

Dabbler in things.


Jun
28
revised Semisimple-ish rings!
changed M to I in "I subseteq J(R)"
Jun
26
answered Pseudo-random number generation algorithms
Jun
24
comment What's wrong with the surreals?
I actually remember one more disadvantage mention by Conway: equality is a defined relation, and a pretty subtle one at that. It's not too easy to figure out when two expressions for surreal numbers are actually equal.
Jun
20
comment What can be tiled by T-tetrominoes?
The paper "Tiling rectangles with T-tetrominoes" by Korn and Pak seems to present some progress for non-rectangular simply-connected regions, mainly Theorem 11 in section 8. It doesn't seem like they have a complete answer though. citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.70.6847
Jun
3
awarded  Enlightened
Jun
2
awarded  Nice Answer
Jun
2
awarded  Nice Answer
May
25
awarded  Nice Answer
May
15
awarded  Nice Answer
May
14
comment If Erdős is published as Erdös in a paper, which do I cite?
Is there a badge for "first answer to make someone laugh out loud"?
May
8
revised Lower bounds on zeta(s+it) for fixed s
More specific title
May
1
revised Frobenius number for three numbers
added 12 characters in body; added 4 characters in body
Apr
29
revised Are there infinitely many equivalence classes of similar matrices?
added 1 characters in body
Apr
21
comment Connectedness of random distance graph on integers
True. My mistake.
Apr
21
revised Connectedness of random distance graph on integers
added 160 characters in body; deleted 156 characters in body; added 97 characters in body
Apr
21
answered Connectedness of random distance graph on integers
Apr
21
comment Enumeration of Regular Graphs
I don't think there's any closed form formula, but you can compare your results with the data in OEIS, such as here: oeis.org/A005638 (for 3-regular graphs) or here: oeis.org/A051031. This is indexed by the number of vertices, not edges, but of course for fixed k this is the same up to a factor of k/2.
Apr
5
comment What's the name of this 2D cellular automaton?
Sounds familiar but I can't quite place it off the top of my head. Places to look would be the chapters on cellular automata in Gale's "Tracking the automatic ant", and of course Gardner's books and perhaps Hofstadter's collections from Sci Am.
Mar
22
revised Open source mathematical software.
minor typo
Mar
22
answered Open source mathematical software.