6 citations · 6 across the 5 of their papers we have counts for
5 papers
Centralisers of semi-simple elements are semidirect products
François Digne, Jean Michel
Let $\bG$ be a connected reductive algebraic group over an algebraically closed field, and let $s\in\bG$ be a semisimple element. We show that the centraliser of is the semidir…
Retraction to a parabolic subgroup and applications
François Digne, Eddy Godelle, Jean Michel
We continue the study of the retraction from an Artin group to a standard parabolic subgroup introduced by Blufstein, Charney, Paris and the second author. Using right and left ret…
Ribbons in Garside monoids
François Digne, Jean Michel
We expound the properties of ribbons in a setting which is general enough to encompass spherical Artin monoids and dual braid monoids of well-generated complex reflection groups. W…
Garside and locally Garside categories
François Digne, Jean Michel
We define and give axioms for Garside and locally Garside categories. We give an application to Coxeter and Artin groups and Deligne-Lusztig varieties.
Endomorphisms of Deligne-Lusztig varieties
François Digne, Jean Michel
This paper is a following to math.RT/0410454. For a finite group of Lie type we study the endomorphisms, commuting with the group action, of a Deligne-Lusztig variety associated to…