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Pierre PC

France

French postdoc, working at Notre Dame, USA.

I am interested in stochastic processes, Riemannian geometry, and global analysis.

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66
Short exact sequences every mathematician should know
mathoverflow.net

29
Does anyone see how to prove "every prime except 2, 3, 11, 17 is a sum of 2 or 3 distinct primes?" I've checked it for all primes $\le 10^8$
mathoverflow.net

10
Injectivity of certain integral transformation
mathoverflow.net

10
What's your favorite Cantor space?
mathoverflow.net

9
Throwing a fair die until most recent roll is smaller than previous one
mathoverflow.net

8
Examples of metric spaces with measurable midpoints
mathoverflow.net

8
Invariance of the Lebesgue measure
mathoverflow.net

8
Is the fractional part of logarithm of primorials dense in $[0, 1]$?
mathoverflow.net

7
Prove that $S^{2n}$ doesn't admit topological group structure only by hairy ball theorem
mathoverflow.net

7
Homological dimensions of rings of smooth functions
mathoverflow.net

6
Spectral gaps for spin manifold Laplace spectrum
mathoverflow.net

6
Is there a prefix-continuous bijection between finite words and eventually zero words?
mathoverflow.net

6
Choosing maximum number of separated points on a sphere surface
mathoverflow.net

6
What do convergent sequences of rational functions look like?
mathoverflow.net

6
Diffeomorphism of an open set and almost all of $\mathbb{R}^n$
mathoverflow.net

6
A polynomial vector field on $\mathbb{R}^3$ which has a knot periodic orbit
mathoverflow.net

5
Simple connectedness under a metric undistortion condition: on a tricky point in an argument of Gromov
mathoverflow.net

5
Construction of an infinitely Fréchet differentiable function with given set of zeros in a Banach space
mathoverflow.net

5
A smooth map on a Banach manifold whose pointwise rank is finite but its rank is not globally bounded
mathoverflow.net

5
Fair cutting of the plane with lines
mathoverflow.net

5
Extension of volume preserving diffeomorphism
mathoverflow.net

5
Prove that there is no finite Borel measure $\mu$ such that set of $\mu$-negligible sets equals the set of meager sets
mathoverflow.net