4,016 reputation
2145
bio website quora.com/Alon-Amit
location Los Altos, CA
age 45
visits member for 5 years, 3 months
seen Dec 20 at 0:39

Dabbler in things.


Apr
15
revised What's the “best” proof of quadratic reciprocity?
(Typo correction)
Feb
17
awarded  Notable Question
Jan
1
revised Which curves cut the Hyperelliptic locus?
edited title
Dec
2
revised Proofs without words
deleted 34 characters in body; added 49 characters in body; deleted 43 characters in body
Sep
29
awarded  Yearling
Jul
27
revised Point sets in Euclidean space with a small number of distinct distances
Fixed exponent of n to 77/141.
Jul
24
awarded  Nice Answer
Jul
7
awarded  Nice Answer
Sep
30
awarded  Yearling
Sep
19
revised Number of finite simple groups of given order is at most 2 - is a classification-free proof possible?
Added a few LaTeX tags.
Sep
19
comment out-trees and least upper boundness
I'm still very confused. Yes, lattices contain semicycles, that's just the point - you were asking if every LUB graph is a (kind of) tree, and it isn't. You now changed the question to ask if every connected digraph without semicycles (which further satisfies LUB) must be a (kind of) tree. Well, it is, by definition, right? The underlying undirected graph certainly is a tree (connected and cycle free). This is just an out-tree except that we haven't chosen a specific root.
Sep
16
comment Finite simple groups and conjugacy classes with 2p elements
Is it known that this can't occur with the alternating groups? Empirically it looks like the sizes of the conjugacy classes of $A_n$ all have at least 3 prime factors once $n>8$.
Sep
16
comment Spanning trees in 3 regular graphs.
What do "clip" and "half edges" mean?
Sep
15
answered out-trees and least upper boundness
Sep
11
comment Second eigenvalue of suspension of a graph
Shouldn't you be looking at the Laplacian, rather than the adjacency matrix? For non-regular graphs I'm not sure if the second largest eigenvalue is the thing that controls mixing. Also, the operation you're interested in seems more like taking the cone over $G$, rather than a suspension.
Sep
2
revised Do good math jokes exist?
Fixed broken YouTube link.
Aug
26
revised Theorems for nothing (and the proofs for free)
typo correction.
Aug
5
comment What are some proofs of Godel's Theorem which are *essentially different* from the original proof?
An awesome summary!
Jul
28
revised Maximal ideals in the ring of continuous real-valued functions on R
LaTeXification.
Jul
28
comment What should be learned in an introductory analytic number theory course?
I'm curious: what is "Pollack's new book"?