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# Pure and Applied Mathematics Quarterly

## Volume 17 (2021)

### Number 4

### Special Issue: In Memory of Prof. Bertram Kostant

Guest Editors: Shrawan Kumar, Lizhen Ji, and Kefeng Liu

### Contents

Preface

pp. 1155-1157

Associated varieties for real reductive groups

pp. 1191-1267

Unitary representations, $L^2$ Dolbeault cohomology, and weakly symmetric pseudo-riemannian nilmanifolds

pp. 1269-1290

Schubert structure operators and $K^\ast_T (G/B)$

pp. 1345-1385

Harmonic analysis on $\mathsf{GL}_n$ over finite fields

pp. 1387-1463

Localizations for quiver Hecke algebras

pp. 1465-1548