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JOURNALS // Izvestiya Rossiiskoi Akademii Nauk. Seriya Matematicheskaya // Archive

Izv. RAN. Ser. Mat., 2025 Volume 89, Issue 5, Pages 80–106 (Mi im9687)

Perverse sheaves on smooth toric varieties and stacks

S. V. Guminovab

a Centre of Pure Mathematics MIPT
b National Research University Higher School of Economics, Moscow

Abstract: It is usually not straightforward to work with the category of perverse sheaves on a variety using only its definition as a heart of a $t$-structure. In this paper, the category of perverse sheaves on a smooth toric variety with its orbit stratification is described explicitly as a category of finite-dimensional modules over an algebra. An analogous result is also established for various categories of equivariant perverse sheaves, which in particular gives a description of perverse sheaves on toric orbifolds, and we also compare the derived category of the category of perverse sheaves to the derived category of constructible sheaves.

Keywords: perverse sheaf, toric geometry.

UDC: 512.7

MSC: Primary 14M25; Secondary 32S60, 14F06

Received: 27.12.2024
Revised: 18.03.2025

DOI: 10.4213/im9687


 English version:
Izvestiya: Mathematics, 2025, 89:5, 945–968

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© Steklov Math. Inst. of RAS, 2026