bio  website  math.temple.edu/~rivin 

location  USA  
age  
visits  member for  4 years, 5 months 
seen  7 hours ago  
stats  profile views  14,147 
Professor of Mathematics at Temple University. Regius Professor of Mathematics at St Andrews starting Fall 2015.
7h

answered  Volume of the unitary group 
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answered  Density of polynomials with a prescribed number field extension 
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answered  Expected number of leaf nodes in some theoretical graph models 
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answered  A question on Hawaiian earring 
20h

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Animating a unitary transform
And, by the way, this is actually the same as the other answer. 
20h

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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

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Uniform upper bound for the sum over primes $\sum_{p \leq x} p^{1+\varepsilon}$
No one reads any more :( 
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Does this count as a canonical decomposition for nonelementary hyperbolic 3orbifolds?
In what sense is $(0, 0, 1)$ the canonical choice? What happens if it has nontrivial stabilizer? 
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answered  Animating a unitary transform 
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Elliptic Curve: Q=nP
"in general" means that some elliptic curves have trivial Qrank, but the general one does not. 
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Minimum number of real multiplications to multiply two quaternions
Duplicate of math.stackexchange.com/questions/1222820/… 
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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... 
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revised 
Bounding the number of lattice points inside an $n$dimensional ellipsoid
added nonasymp info. 
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Bounding the number of lattice points inside an $n$dimensional ellipsoid
@BerkU. See the edit. 
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answered  padic analogue of the Strong Law of Large Numbers 
1d

answered  Uniform upper bound for the sum over primes $\sum_{p \leq x} p^{1+\varepsilon}$ 
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answered  Bounding the number of lattice points inside an $n$dimensional ellipsoid 
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awarded  Notable Question 
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On BohrMollerupTheorem
$$F(x) = f(\{x\}) \prod_{i=1}^{\lfloor x \rfloor} (xi).$$ 
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On BohrMollerupTheorem
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? 