bio  website  math.temple.edu/~rivin 

location  USA  
age  
visits  member for  4 years, 4 months 
seen  5 hours ago  
stats  profile views  13,862 
Professor of Mathematics at Temple University. Regius Professor of Mathematics at St Andrews starting Fall 2015.
1d

comment 
finite cyclic group have subgroup of prime index
Yes, it is true, but you should prove it yourself. 
2d

comment 
Proof for additivity of cumulants
@seno44 I see no reason why the binomial theorem would not give you what you want by induction. 
2d

answered  Analytical value for the first eigenvalue of a certain spherical triangle 
Mar 24 
comment 
Real Zeros  tail estimate
@oferzeitouni Do you have a reference for the gaussian tail? After posting the question, I found that HoughKrishnapurPeresVirag talk about it, but I think they only get an exponential decay (in some regime). Thanks! 
Mar 23 
answered  How compute combinatorial expression 
Mar 23 
asked  Real Zeros  tail estimate 
Mar 23 
revised 
Obtain any 3manifold from repeating surgeries on knots in $S^3$
grammatical error 
Mar 23 
answered  algorithm of polytope 
Mar 23 
comment 
Obtain any 3manifold from repeating surgeries on knots in $S^3$
A relative of yours? 
Mar 23 
answered  Obtain any 3manifold from repeating surgeries on knots in $S^3$ 
Mar 23 
comment 
A hypergeometric identity
(a) What does "a simple proof" mean? (b) Do you know of a complicated proof? 
Mar 22 
comment 
Obtain any 3manifold from repeating surgeries on knots in $S^3$
Do you know of an easier proof without f.g.? 
Mar 22 
comment 
When are the adjacency matrices of nonisomorphic graphs similar?
Yes, I am just saying that the algorithm of checking for similarity first will (in practice) greatly underperform standard heuristic. I certainly agree that the question is of theoretical interest (though is probably very hard). 
Mar 22 
comment 
Obtain any 3manifold from repeating surgeries on knots in $S^3$
By the way, I have never looked at Dehn's proof. I wonder if the proof is easier if you don't care about finite generation (which you don't, for this question). 
Mar 22 
comment 
When are the adjacency matrices of nonisomorphic graphs similar?
It should be noted that most graph isomorphism testing heuristics are mp MUCH faster than cubic, usually, so this question is not of great practical significance... 
Mar 22 
comment 
Obtain any 3manifold from repeating surgeries on knots in $S^3$
But my understanding has always been that Dehn's theorem was the nontrivial part. 
Mar 22 
comment 
Obtain any 3manifold from repeating surgeries on knots in $S^3$
Why do you attribute this theorem to Lickorish, instead of Dehn? 
Mar 21 
answered  Find matrices which generate a given set of vectors 
Mar 20 
comment 
Find matrices which generate a given set of vectors
What does "small" mean? 
Mar 20 
comment 
Continuous maps which send intervals of $\mathbb{R}$ to convex subsets of $\mathbb{R}^2$
Ah, did not notice the 11 hypothesis... 