Representation Theory and Geometry of the Flag Variety

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This comprehensive reference begins with a review of the basics followed by a presentation of flag varieties and finite-dimensional representations in classical types and subvarieties of flag varieties and their singularities. Associated varieties and characteristic cycles are covered as well and Kazhdan-Lusztig polynomials are treated. The coverage concludes with a discussion of pattern avoidance and singularities.

Author(s): William M. McGovern
Series: De Gruyter Studies in Mathematics, 90
Publisher: De Gruyter
Year: 2022

Language: English
Pages: 136
City: Berlin

Preface
Contents
1 Preliminaries
2 Polynomial representations and the flag variety
3 Associated, characteristic, and orbital varieties
4 Singularities of orbit closures
5 Kazhdan–Lusztig polynomials and the Hecke algebra
6 Lusztig–Vogan polynomials and Harish-Chandra modules
7 Pattern avoidance and singularities of orbit closures
8 Springer fibers
Bibliography
Index