5 datasets found

We study the cohomology of Deligne-Lusztig varieties with aim the construction of actions of Hecke algebras on such cohomologies, as predicted by the conjectures of...

We construct a functor from the category of oriented tangles in ${\Bbb R}^3$ to the category of Hermitian modules and Lagrangian relations over ${\Bbb Z}[t,t^{-1}]$....

International audience

A knot is an embedding of a circle into a 3-dimensional manifold. When this man- ifold is the sphere, knots can be described combinatorially using Gauss diagrams....

We study combinatorial properties of virtual braid groups and we describe relations with finite type invariant theory for virtual knots and Yang-Baxter equations