{"title":"On the Artin vanishing theorem for Stein spaces","authors":"Olivier Benoist","doi":"10.1112/blms.70124","DOIUrl":null,"url":null,"abstract":"<p>Artin vanishing theorems for Stein spaces refer to the vanishing of some of their (co)homology groups in degrees higher than the dimension. We obtain new positive and negative results concerning Artin vanishing for the cohomology of a Stein space relative to a Runge open subset. We also prove an Artin vanishing theorem for the <span></span><math>\n <semantics>\n <mrow>\n <mi>Gal</mi>\n <mo>(</mo>\n <mi>C</mi>\n <mo>/</mo>\n <mi>R</mi>\n <mo>)</mo>\n </mrow>\n <annotation>$\\mathrm{Gal}(\\mathbb {C}/\\mathbb {R})$</annotation>\n </semantics></math>-equivariant cohomology of a <span></span><math>\n <semantics>\n <mrow>\n <mi>Gal</mi>\n <mo>(</mo>\n <mi>C</mi>\n <mo>/</mo>\n <mi>R</mi>\n <mo>)</mo>\n </mrow>\n <annotation>$\\mathrm{Gal}(\\mathbb {C}/\\mathbb {R})$</annotation>\n </semantics></math>-equivariant Stein space relative to the fixed locus.</p>","PeriodicalId":55298,"journal":{"name":"Bulletin of the London Mathematical Society","volume":"57 9","pages":"2757-2769"},"PeriodicalIF":0.9000,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the London Mathematical Society","FirstCategoryId":"100","ListUrlMain":"https://londmathsoc.onlinelibrary.wiley.com/doi/10.1112/blms.70124","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
Abstract
Artin vanishing theorems for Stein spaces refer to the vanishing of some of their (co)homology groups in degrees higher than the dimension. We obtain new positive and negative results concerning Artin vanishing for the cohomology of a Stein space relative to a Runge open subset. We also prove an Artin vanishing theorem for the -equivariant cohomology of a -equivariant Stein space relative to the fixed locus.