Séminaire SPACE Tours
The ABC of p-CellsThorge Jensen (University of Clermont Auvergne.)
Friday 13 December 2019 10:30 - Tours - E 1180
Résumé :
The Hecke category is a categorification of the Hecke algebra that plays an important role in (geometric) representation theory. Using this categorification, I will introduce a positive characteristic analogue of the famous Kazhdan-Lusztig basis of the Hecke algebra, called the p-canonical or p-Kazhdan-Lusztig basis. If time permits, I will mention connections between the p-Kazhdan- Lusztig basis and the representation theory of reductive algebraic groups. Motivated by the very rich theory of Kazhdan-Lusztig cells, I study cells with respect to the p-Kazhdan-Lusztig basis. Throughout the talk, I will use SL_2 as a running example. In the end, I will give a complete description of p-Cells in finite type A and mention some interesting results in finite types B and C.
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