{"title":"On formal non-commutative deformations of smooth varieties","authors":"Yujiro Kawamata","doi":"10.1016/j.aim.2025.110392","DOIUrl":null,"url":null,"abstract":"<div><div>We will develop a formal non-commutative (NC) deformation theory of smooth algebraic varieties <em>X</em> defined over a field <em>k</em>, and describe a semi-universal deformation where the tangent space <span><math><msup><mrow><mi>T</mi></mrow><mrow><mn>1</mn></mrow></msup></math></span> and the obstruction space <span><math><msup><mrow><mi>T</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> are given by the Hochschild cohomology groups.</div></div>","PeriodicalId":50860,"journal":{"name":"Advances in Mathematics","volume":"478 ","pages":"Article 110392"},"PeriodicalIF":1.5000,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Mathematics","FirstCategoryId":"100","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0001870825002907","RegionNum":1,"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
Abstract
We will develop a formal non-commutative (NC) deformation theory of smooth algebraic varieties X defined over a field k, and describe a semi-universal deformation where the tangent space and the obstruction space are given by the Hochschild cohomology groups.
期刊介绍:
Emphasizing contributions that represent significant advances in all areas of pure mathematics, Advances in Mathematics provides research mathematicians with an effective medium for communicating important recent developments in their areas of specialization to colleagues and to scientists in related disciplines.