bio | website | quora.com/Alon-Amit |
---|---|---|
location | Los Altos, CA | |
age | 46 | |
visits | member for | 5 years, 10 months |
seen | 23 hours ago | |
stats | profile views | 4,097 |
Dabbler in things.
Jan 11 |
answered | About an exercise in Serre's “Trees” |
Jan 4 |
comment |
Is “second-countable implies separable” equivalent to the Axiom of countable Choice?
Surely this requires only the axiom of countable choice? |
Dec 22 |
awarded | Nice Answer |
Dec 8 |
comment |
How many finite simple groups of order $p+1$?
n!/2-1 is prime for n=5, 6, 9, 31, 41, 373 ... (sequence A082671 on the OEIS). Is it known if this sequence is finite? |
Dec 5 |
awarded | Nice Answer |
Nov 30 |
comment |
Ingenuity in mathematics
To complete the triviality of the situation, after your audience proposes a bunch of complex strategies, propose an alternative game whereby after "STOP" it's the last card in the deck that gets turned over. Everyone sees that this game is strategy-indifferent, and then you deliver the coup de grace... I've used this several times in math circles. Gets them every time. |
Nov 13 |
awarded | Popular Question |
Nov 10 |
comment |
Proofs without words
Done! Thanks for the comment. |
Nov 10 |
revised |
Proofs without words
Replaced image url; added 348 characters in body |
Nov 2 |
awarded | Nice Answer |
Nov 2 |
awarded | Nice Question |
Nov 1 |
answered | Most memorable titles |
Oct 27 |
revised |
P-adic L functions
minor LaTeX fix |
Oct 12 |
comment |
roots of permutations
True. My answer attempts to generalize further into equations in several variables. |
Oct 12 |
answered | roots of permutations |
Sep 30 |
awarded | Yearling |
Sep 19 |
comment |
4-colorable graphs
It's even falser :-) In fact, there are graphs with high girth and high chromatic number. A graph with high girth looks like a tree around any vertex, so it avoids much more than just triangles. Proving that such graphs exist is perhaps even simpler than the explicit construction by Mycielski; it's basically a counting argument. |
Sep 11 |
awarded | Nice Answer |
Sep 10 |
answered | What is the easiest randomized algorithm to motivate to the layperson? |
Aug 28 |
revised |
Does the “continuous locus” of a function have any nice properties?
added 39 characters in body |