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Feb
19
awarded  Great Question
Feb
18
awarded  Popular Question
Feb
18
awarded  Revival
Feb
16
awarded  Yearling
Feb
5
comment Problem about combinations and permutations
The first customer has 14 choices, the next 13, and the last 12. It's 14P3, not 14C3.
Oct
14
comment $\gcd(p, (p-1)!) = 1$?
Wilson's theorem settles this in 1 step: en.wikipedia.org/wiki/Wilson's_theorem
Sep
30
awarded  Explainer
Sep
24
awarded  Autobiographer
Sep
11
awarded  Good Question
Jul
15
revised Finding rational points at rational distance in the plane
deleted 1 character in body
Jul
15
comment Finding rational points at rational distance in the plane
@QiaochuYuan: Take $p$ to be $(1/\pi, \sqrt{1-1/\pi^2})$. Aren't both coordinates transcendental? And isn't $p$ unit distance from the origin?
Jul
15
asked Finding rational points at rational distance in the plane
Jul
2
awarded  Curious
Apr
12
awarded  Popular Question
Feb
16
awarded  Yearling
Feb
6
revised Expected tail and head length of $\rho$ for a finite random function
edited body
Jan
30
accepted Looking for intuition behind coin-flipping pattern expectation
Dec
9
answered Equivalence Classes of a Relation Given as a Set of Ordered Pairs
Oct
20
awarded  Great Question
Sep
9
answered Fields, closed under two operations