Unipotent nearby cycles and nearby cycles over general bases
Fuente:
arXiv
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| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909087544901632 |
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| author | Salmon, Andrew |
| author_facet | Salmon, Andrew |
| contents | We show that under some conditions, two constructions of nearby cycles over general bases coincide. More specifically, we show that under the assumption of $Ψ$-factorizability, the constructions of unipotent nearby cycles over an affine space can be described using the theory of nearby cycles over general bases via the vanishing topos. In particular, this applies to nearby cycles of Satake sheaves on Beilinson-Drinfeld Grassmannians with parahoric ramification. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_16746 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unipotent nearby cycles and nearby cycles over general bases Salmon, Andrew Algebraic Geometry 14F20 We show that under some conditions, two constructions of nearby cycles over general bases coincide. More specifically, we show that under the assumption of $Ψ$-factorizability, the constructions of unipotent nearby cycles over an affine space can be described using the theory of nearby cycles over general bases via the vanishing topos. In particular, this applies to nearby cycles of Satake sheaves on Beilinson-Drinfeld Grassmannians with parahoric ramification. |
| title | Unipotent nearby cycles and nearby cycles over general bases |
| topic | Algebraic Geometry 14F20 |
| url | https://arxiv.org/abs/2401.16746 |