Hermitian duals and generic representations for affine Hecke algebras

E Opdam, M Solleveld - arXiv preprint arXiv:2309.04829, 2023 - arxiv.org
We further develop the abstract representation theory of affine Hecke algebras with arbitrary
positive parameters. We establish analogues of several results that are known for reductive …

[HTML][HTML] Duality for Ext-groups and extensions of discrete series for graded Hecke algebras

KY Chan - Advances in Mathematics, 2016 - Elsevier
In this paper, we study extensions of graded affine Hecke algebra modules. In particular,
based on an explicit projective resolution on graded affine Hecke algebra modules, we …

Ladder representations of

D Barbasch, D Ciubotaru - Representations of Reductive Groups: In Honor …, 2015 - Springer
In this paper, we recover certain known results about the ladder representations of GL (n, ℚ
p) GL (n, Q _ p) defined and studied by Lapid, Mínguez, and Tadić. We work in the …

Star operations for affine Hecke algebras

D Barbasch, D Ciubotaru - arXiv preprint arXiv:1504.04361, 2015 - arxiv.org
In this paper, we consider the star operations for (graded) affine Hecke algebras which
preserve certain natural filtrations. We show that, up to inner conjugation, there are only two …

Dual of the Geometric Lemma and the Second Adjointness Theorem for -adic reductive groups

KY Chan - arXiv preprint arXiv:2406.13546, 2024 - arxiv.org
Let $ P, Q $ be standard parabolic subgroups of a $ p $-adic reductive group $ G $. We
study the smooth dual of the filtration on a parabolically induced module arising from the …

Dirac cohomology of one-𝑊-type representations

D Ciubotaru, A Moy - Proceedings of the American Mathematical Society, 2015 - ams.org
The smooth hermitian representations of a split reductive $ p $-adic group whose restriction
to a maximal hyperspecial compact subgroup contain a single $ K $-type with Iwahori fixed …

Some methods of computing first extensions between modules of graded Hecke algebras

KY Chan - Algebras and Representation Theory, 2018 - Springer
In this paper, we establish connections between the first extensions of simple modules and
certain filtrations of of standard modules in the setting of graded Hecke algebras. The …

[图书][B] Extensions of graded affine Hecke algebra modules

KY Chan - 2014 - search.proquest.com
In this dissertation, we study extensions of graded affine Hecke algebra modules. In
particular, based on an explicit projective resolution on graded affine Hecke algebra …

On the Use of Index Theory to Compute the Signatures of Certain Hermitian Forms

C Du - 2022 - search.proquest.com
Let (π, V) be an irreducible finite-dimensional representation of a real reductive Lie group G.
We discuss the non-degenerate G-invariant hermitian form⟨·,·⟩ G on V. If dimV> 1, G is …

[PDF][PDF] Tutorial on affine Hecke algebras

D Ciubotaru - group, 2016 - imsarchives.nus.edu.sg
The object of these lectures is to present the necessary background for some aspects of the
representation theory and harmonic analysis of affine Hecke algebras (eg, classification of …