{"title":"通过对称半简空间的同调过滤","authors":"Oishee Banerjee","doi":"10.1007/s00209-024-03563-z","DOIUrl":null,"url":null,"abstract":"<p>In the simplicial theory of hypercoverings we replace the indexing category <span>\\(\\Delta \\)</span> by the <i>symmetric simplicial category</i> <span>\\(\\Delta S\\)</span> and study (a class of) <span>\\(\\Delta _{\\textrm{inj}}S\\)</span>-hypercoverings, which we call <i>spaces admitting symmetric (semi)simplicial filtration</i>—this special class happens to have a structure of a module over a graded commutative monoid of the form <span>\\(\\textrm{Sym}\\,M\\)</span> for some space <i>M</i>. For <span>\\(\\Delta S\\)</span>-hypercoverings we construct a spectral sequence, somewhat like the Čech-to-derived category spectral sequence. The advantage of working with <span>\\(\\Delta S\\)</span> over <span>\\(\\Delta \\)</span> is that various combinatorial complexities that come with working on <span>\\(\\Delta \\)</span> are bypassed, giving simpler, unified proof of results like the computation of (in some cases, stable) singular cohomology (with <span>\\(\\mathbb {Q}\\)</span> coefficients) and étale cohomology (with <span>\\(\\mathbb {Q}_{\\ell }\\)</span> coefficients) of the moduli space of degree <i>n</i> maps <span>\\(C\\rightarrow \\mathbb {P}^r\\)</span> with <i>C</i> a smooth projective curve of genus <i>g</i>, of unordered configuration spaces, of the moduli space of smooth sections of a fixed <span>\\(\\mathfrak {g}^r_d\\)</span> that is <i>m</i>-very ample for some <i>m</i> etc. In the special case when a <span>\\(\\Delta _{\\textrm{inj}}S\\)</span>-object <i>X</i> <i>admits a symmetric semisimplicial filtration by</i> <i>M</i>, we relate these moduli spaces to a certain derived tensor.</p>","PeriodicalId":18278,"journal":{"name":"Mathematische Zeitschrift","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Filtration of cohomology via symmetric semisimplicial spaces\",\"authors\":\"Oishee Banerjee\",\"doi\":\"10.1007/s00209-024-03563-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In the simplicial theory of hypercoverings we replace the indexing category <span>\\\\(\\\\Delta \\\\)</span> by the <i>symmetric simplicial category</i> <span>\\\\(\\\\Delta S\\\\)</span> and study (a class of) <span>\\\\(\\\\Delta _{\\\\textrm{inj}}S\\\\)</span>-hypercoverings, which we call <i>spaces admitting symmetric (semi)simplicial filtration</i>—this special class happens to have a structure of a module over a graded commutative monoid of the form <span>\\\\(\\\\textrm{Sym}\\\\,M\\\\)</span> for some space <i>M</i>. For <span>\\\\(\\\\Delta S\\\\)</span>-hypercoverings we construct a spectral sequence, somewhat like the Čech-to-derived category spectral sequence. The advantage of working with <span>\\\\(\\\\Delta S\\\\)</span> over <span>\\\\(\\\\Delta \\\\)</span> is that various combinatorial complexities that come with working on <span>\\\\(\\\\Delta \\\\)</span> are bypassed, giving simpler, unified proof of results like the computation of (in some cases, stable) singular cohomology (with <span>\\\\(\\\\mathbb {Q}\\\\)</span> coefficients) and étale cohomology (with <span>\\\\(\\\\mathbb {Q}_{\\\\ell }\\\\)</span> coefficients) of the moduli space of degree <i>n</i> maps <span>\\\\(C\\\\rightarrow \\\\mathbb {P}^r\\\\)</span> with <i>C</i> a smooth projective curve of genus <i>g</i>, of unordered configuration spaces, of the moduli space of smooth sections of a fixed <span>\\\\(\\\\mathfrak {g}^r_d\\\\)</span> that is <i>m</i>-very ample for some <i>m</i> etc. In the special case when a <span>\\\\(\\\\Delta _{\\\\textrm{inj}}S\\\\)</span>-object <i>X</i> <i>admits a symmetric semisimplicial filtration by</i> <i>M</i>, we relate these moduli spaces to a certain derived tensor.</p>\",\"PeriodicalId\":18278,\"journal\":{\"name\":\"Mathematische Zeitschrift\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2024-08-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Mathematische Zeitschrift\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://doi.org/10.1007/s00209-024-03563-z\",\"RegionNum\":3,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mathematische Zeitschrift","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1007/s00209-024-03563-z","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
摘要
在超覆盖的简单理论中,我们用对称简单范畴(\Δ S\ )来代替索引范畴(\Δ \),并研究(一类)\(\Δ _{\textrm{inj}}S\)-超覆盖、对于某个空间 M 而言,这一类空间恰好有一个分级交换单元的模块结构,其形式是 \(\textrm{Sym}\,M\)。对于 \(\Delta S\) -hypercoverings 我们构建了一个谱序列,有点像 Čech-to-derived category 谱序列。使用\(\Delta S\) 而不是\(\Delta \)的好处在于,绕过了使用\(\Delta \)时的各种组合复杂性,从而可以更简单、统一地证明结果,比如计算(在某些情况下)稳定的奇异同调、稳定的)奇异同调(与 \(\mathbb {Q}\) coefficients)和 n 度映射的模空间的 étale 同调(与 \(\mathbb {Q}_\{ell }\) coefficients),其中 C 是属 g 的光滑投影曲线、无序配置空间的无序配置空间,对于某个 m 是 m-very ample 的固定 \(\mathfrak {g}^r_d\) 的平滑截面的模空间等等。在一个 \(\Delta _{textrm{inj}}S\)对象 X 允许 M 对称半简过滤的特殊情况下,我们将这些模空间与某个派生张量联系起来。
Filtration of cohomology via symmetric semisimplicial spaces
In the simplicial theory of hypercoverings we replace the indexing category \(\Delta \) by the symmetric simplicial category\(\Delta S\) and study (a class of) \(\Delta _{\textrm{inj}}S\)-hypercoverings, which we call spaces admitting symmetric (semi)simplicial filtration—this special class happens to have a structure of a module over a graded commutative monoid of the form \(\textrm{Sym}\,M\) for some space M. For \(\Delta S\)-hypercoverings we construct a spectral sequence, somewhat like the Čech-to-derived category spectral sequence. The advantage of working with \(\Delta S\) over \(\Delta \) is that various combinatorial complexities that come with working on \(\Delta \) are bypassed, giving simpler, unified proof of results like the computation of (in some cases, stable) singular cohomology (with \(\mathbb {Q}\) coefficients) and étale cohomology (with \(\mathbb {Q}_{\ell }\) coefficients) of the moduli space of degree n maps \(C\rightarrow \mathbb {P}^r\) with C a smooth projective curve of genus g, of unordered configuration spaces, of the moduli space of smooth sections of a fixed \(\mathfrak {g}^r_d\) that is m-very ample for some m etc. In the special case when a \(\Delta _{\textrm{inj}}S\)-object Xadmits a symmetric semisimplicial filtration byM, we relate these moduli spaces to a certain derived tensor.