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math.RT2023
Families of isotropic subspaces of a symplectic Z/2-vector space
G. Lusztig
For a symplectic vector space V over Z/2 with a given circular basis we give a non-inductive definition of a family of isotropic subspaces of V with remarkable properties.
math.RT2023
On bases of certain Grothendieck groups, II
G. Lusztig
In previous papers the author introduced a new basis of the Grpthendieck group of unipotent representations of a finite Chevalley group. In type D the definition of this basis was…
math.RT2023
Rigid strata in a reductive group
G. Lusztig
We define (in two, equivalent ways) the notion of a rigid stratum of a reductive group. This generalizes the notion of rigid unipotent class.