3,858 reputation
1742
bio website affinemess.com
location Los Altos, CA
age 44
visits member for 4 years, 6 months
seen 2 days ago
Math Circler, ex-Googler and Dad. Now at Facebook.

Apr
20
awarded  Popular Question
Apr
18
comment Proof of no rational point on Selmer's Curve 3x^3+4y^3+5z^3=0
@Ho Chung Siu, do you happen to have a copy of that paper anywhere accessible?
Apr
18
awarded  Nice Question
Apr
14
comment What is the high-concept explanation on why real numbers are useful in number theory?
This is totally tangential but I just want to say I strongly disagree with the sentiment of the first sentence. If statements and proofs were typically "in the same world", math would be so dull. Dystopia.
Apr
10
comment Motivation behind Tutte's 1-factor theorem
I changed the question's title to better correspond to its content. You don't appear to be interested in the historical development of the theorem, but rather the motivation behind this characterization. Perhaps a better way to phrase the question would be to ask, is there any algorithmic or theoretical advantage to this (rather daunting) condition.
Apr
10
revised Motivation behind Tutte's 1-factor theorem
Changing the title to better reflect the content of the question.
Mar
9
awarded  Notable Question
Feb
15
awarded  Nice Answer
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