43,081 reputation
654138
bio website math.temple.edu/~rivin
location USA
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visits member for 4 years, 5 months
seen 7 hours ago

Professor of Mathematics at Temple University. Regius Professor of Mathematics at St Andrews starting Fall 2015.


7h
answered Volume of the unitary group
8h
answered Density of polynomials with a prescribed number field extension
14h
answered Expected number of leaf nodes in some theoretical graph models
14h
answered A question on Hawaiian earring
20h
comment Animating a unitary transform
And, by the way, this is actually the same as the other answer.
20h
comment Animating a unitary transform
I don't think this will work, I KNOW this will work. As for how you get $U_1,$ a unitary matrix is normal, so has an orthogonal basis of eigenvectors. $U_1$ is it.
21h
comment Uniform upper bound for the sum over primes $\sum_{p \leq x} p^{-1+\varepsilon}$
No one reads any more :(
22h
comment Does this count as a canonical decomposition for non-elementary hyperbolic 3-orbifolds?
In what sense is $(0, 0, 1)$ the canonical choice? What happens if it has non-trivial stabilizer?
22h
answered Animating a unitary transform
1d
comment Elliptic Curve: Q=nP
"in general" means that some elliptic curves have trivial Q-rank, but the general one does not.
1d
comment Minimum number of real multiplications to multiply two quaternions
Duplicate of math.stackexchange.com/questions/1222820/…
1d
comment Elliptic Curve: Q=nP
Since there are points of infinite order, then in general the answer is NO. The question is not quite suitable for this site...
1d
revised Bounding the number of lattice points inside an $n$-dimensional ellipsoid
added non-asymp info.
1d
comment Bounding the number of lattice points inside an $n$-dimensional ellipsoid
@BerkU. See the edit.
1d
answered p-adic analogue of the Strong Law of Large Numbers
1d
answered Uniform upper bound for the sum over primes $\sum_{p \leq x} p^{-1+\varepsilon}$
1d
answered Bounding the number of lattice points inside an $n$-dimensional ellipsoid
2d
awarded  Notable Question
2d
comment On Bohr-MollerupTheorem
$$F(x) = f(\{x\}) \prod_{i=1}^{\lfloor x \rfloor} (x-i).$$
2d
comment On Bohr-MollerupTheorem
Well, $F(1.5) = 0.5 F(0.5) = 0.5 f(0.5);$ $F(2.7) = 1 F(1.7) = 0.7 f(0.7),$ and so on. What's so unclear about this?