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location Israel
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Oct
13
comment Does $\binom{2n}{n} \equiv 2 \pmod p$ ever hold?
@BenjaminDickman: Thanks for reminding me about mathoverflow.net/a/165441/22971; I will check how relevant it is.
Oct
10
awarded  Nice Question
Oct
10
awarded  Popular Question
Oct
10
comment Does $\binom{2n}{n} \equiv 2 \pmod p$ ever hold?
@The Masked Avenger: I've just made the computation - nothing to write home about. (I have troubles fitting the results into this comment, but they are absolutely non-illuminating, anyway.)
Oct
10
comment Does $\binom{2n}{n} \equiv 2 \pmod p$ ever hold?
@Felipe: having thought for a little while, I don't see any immediate relation. It has to do with $y^{2(n-1)}-x^{2(n-1)}$ being quadratic residues though.
Oct
10
asked Does $\binom{2n}{n} \equiv 2 \pmod p$ ever hold?
Oct
10
awarded  Yearling
Sep
30
awarded  Explainer
Sep
26
awarded  Popular Question
Sep
26
comment List of integers without any arithmetic progression of n terms
@Timothy: my wild guess is that considering progressions with just two carefully chosen differences ($n$ and $n-1$?) may suffice. I think the first step would be to verify this numerically.
Sep
25
awarded  Nice Answer
Sep
24
revised List of integers without any arithmetic progression of n terms
Typos / minor rewording.
Sep
24
comment List of integers without any arithmetic progression of n terms
Having my answer submitted, I noticed a comment by Wolfgang which appeared while I was typing. My answer is based on the very same idea, of course.
Sep
24
answered List of integers without any arithmetic progression of n terms
Sep
23
comment List of integers without any arithmetic progression of n terms
Could you comment on the source of this question?
Sep
14
comment Subgroup cliques in the Paley graph
This is certainly a non-trivial improvement, but still well off from what I'd be happy to have here...
Sep
14
revised Subgroup cliques in the Paley graph
added 727 characters in body
Sep
12
comment Subgroup cliques in the Paley graph
@Felipe: that's interesting. What the improvement is like? Is it effective / explicit? (And thanks for fixing the typo.)
Sep
12
asked Subgroup cliques in the Paley graph
Aug
25
revised Operator norm vs spectral radius for positive matrices
added 268 characters in body