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bio website math.temple.edu/~rivin
location USA
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visits member for 3 years, 8 months
seen 11 hours ago

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 well-known 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