bio  website  math.temple.edu/~rivin 

location  USA  
age  
visits  member for  3 years, 8 months 
seen  11 hours ago  
stats  profile views  12,049 
Professor of Mathematics at Temple University. This year the ICERM Visiting Professor at Brown (and ICERM).
1d

accepted  elementwise functions of positive definite matrix 
Jul 20 
answered  Tools for Removing Radicals from Equations 
Jul 20 
comment 
elementwise functions of positive definite matrix
@UwF The theorem you give actually states that the characterization in my question IS sharp, so if you make this an answer, I would be happy to accept it! 
Jul 20 
asked  elementwise functions of positive definite matrix 
Jul 15 
answered  Covolume of the row span of a matrix and of the kernel of a matrix 
Jul 8 
comment 
Volume of normal cone of a simplex (at a vertex)
Just look at the formulas in the link, and you will see (an) answer... 
Jul 8 
awarded  Nice Answer 
Jul 7 
comment 
Examples of fundamental domains
Since most interesting groups are generated by involutions, I doubt that restricting would help much... 
Jul 7 
comment 
Base change for $\sqrt{2}.$
@NikitaSidorov I, for one, am completely agnostic on the subject, and have absolutely no clue why anyone would believe what you say everyone believes. I am, of course, just a caveman. 
Jul 7 
comment 
Base change for $\sqrt{2}.$
@NikitaSidorov And of course, we all speak for ourselves. 
Jul 7 
comment 
Base change for $\sqrt{2}.$
@AnthonyQuas I cannot actually understand your comment... 
Jul 7 
comment 
Base change for $\sqrt{2}.$
@GeraldEdgar What is the justification for the wellknown conjecture? 
Jul 7 
answered  Volume of normal cone of a simplex (at a vertex) 
Jul 6 
awarded  Enlightened 
Jul 6 
awarded  Nice Answer 
Jul 6 
answered  Determinant of sum of Kronecker products 
Jul 6 
comment 
Determinant of sum of Kronecker products
What do you mean by "efficient"? 
Jul 6 
awarded  Nice Question 
Jul 6 
awarded  Nice Question 
Jul 6 
awarded  Nice Answer 