2020 Fiscal Year Annual Research Report
Ｄｅｌｉｇｎｅ－Ｌｕｓｚｔｉｇ 多様体とＦａｒｇｕｅｓ－Ｆｏｎｔａｉｎｅ 曲線
| Project/Area Number |
19F19022
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| Research Institution | The University of Tokyo |
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Principal Investigator |
今井 直毅 東京大学, 大学院数理科学研究科, 准教授 (90597775)
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| Co-Investigator(Kenkyū-buntansha) |
GAISIN ILDAR 東京大学, 数理(科)学研究科(研究院), 外国人特別研究員
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| Project Period (FY) |
2019-04-25 – 2021-03-31
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| Keywords | Cohomology |
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| Outline of Annual Research Achievements |
During the period April 2020-March 2021, together with my collegue Teruhisa Koshikawa, we developed a relative version of A_Inf-cohomology. First some background: Given a proper smooth formal scheme X over the ring of integers, Bhatt-Morrow-Scholze constructed a complex of A_Inf-modules which specializes to other p-adic cohomology theories (their work published in 2018). In recent work of Koshikawa and myself we generalize this construction to the relative situation. In
short, this means that for a smooth morphism of p-adic formal schemes f: X -> Y, we construct a complex (using the decalage functor) living on the pro-etale site of the adic generic fiber of Y, which interpolates the de Rham complex. Although, our methods are similar to that of Bhatt-Morrow-Scholze, there is the appearance of a new object in this setup: fibered product of topoi. One difference in this setup (compared to BMS) is that results are only possible up to almost ambiguity (due to almost non-zero elements in higher cohomology groups for the pro-etale topology). One consequence of our work is the existence of a relative Hodge-Tate spectral sequence which generalizes the ones constructed by Caraiani-Scholze (dvr setting) et Abbes-Gros (scheme setting). Moreover we compare our relative A_Inf-cohomology with the prismatic/q-crystalline theory developed by Bhatt-Scholze.
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| Research Progress Status |
令和2年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和2年度が最終年度であるため、記入しない。
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