Pierre Guillot

There is a general cohomology defined by Sweedler for co-commutative Hopf algebras, generalizing the usual cohomology of a group or a Lie algebra. Recently it was discovered that low-dimensional groups could be defined without the co-commutativity...

I am going to explain how representations of the braid groups endowed with a compatible symplectic form give rise to link invariants with values in the Witt ring of the field considered. The construction makes use of Maslov indices. In the end, using...

The quadratic reciprocity law (dating back to Gauss) cute result of algebra letting you decide almost instantly whether a given integer is a square modulo a prime. This theorem is famous for having about 100 different proofs, and counting. I'll...

This is the second talk of a series in Persistent homology

This is a continuation on the topic of cyclic homology

This is the first talk of a series in Persistent homology