{"title":"The spectrum of a twisted commutative algebra","authors":"Andrew Snowden","doi":"10.1112/plms.12576","DOIUrl":null,"url":null,"abstract":"A twisted commutative algebra is (for us) a commutative <math altimg=\"urn:x-wiley:00246115:media:plms12576:plms12576-math-0001\" display=\"inline\" location=\"graphic/plms12576-math-0001.png\">\n<semantics>\n<mi mathvariant=\"bold\">Q</mi>\n$\\mathbf {Q}$</annotation>\n</semantics></math>-algebra equipped with an action of the infinite general linear group. In such algebras, the “<math altimg=\"urn:x-wiley:00246115:media:plms12576:plms12576-math-0002\" display=\"inline\" location=\"graphic/plms12576-math-0002.png\">\n<semantics>\n<mi mathvariant=\"bold\">GL</mi>\n$\\mathbf {GL}$</annotation>\n</semantics></math>-prime” ideals assume the duties fulfilled by prime ideals in ordinary commutative algebra, and so it is crucial to understand them. Unfortunately, distinct <math altimg=\"urn:x-wiley:00246115:media:plms12576:plms12576-math-0003\" display=\"inline\" location=\"graphic/plms12576-math-0003.png\">\n<semantics>\n<mi mathvariant=\"bold\">GL</mi>\n$\\mathbf {GL}$</annotation>\n</semantics></math>-primes can have the same radical, which obstructs one from studying them geometrically. We show that this problem can be eliminated by working with super vector spaces: doing so provides enough geometry to distinguish <math altimg=\"urn:x-wiley:00246115:media:plms12576:plms12576-math-0004\" display=\"inline\" location=\"graphic/plms12576-math-0004.png\">\n<semantics>\n<mi mathvariant=\"bold\">GL</mi>\n$\\mathbf {GL}$</annotation>\n</semantics></math>-primes. This yields an effective method for analyzing <math altimg=\"urn:x-wiley:00246115:media:plms12576:plms12576-math-0005\" display=\"inline\" location=\"graphic/plms12576-math-0005.png\">\n<semantics>\n<mi mathvariant=\"bold\">GL</mi>\n$\\mathbf {GL}$</annotation>\n</semantics></math>-primes.","PeriodicalId":49667,"journal":{"name":"Proceedings of the London Mathematical Society","volume":"33 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the London Mathematical Society","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1112/plms.12576","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
A twisted commutative algebra is (for us) a commutative -algebra equipped with an action of the infinite general linear group. In such algebras, the “-prime” ideals assume the duties fulfilled by prime ideals in ordinary commutative algebra, and so it is crucial to understand them. Unfortunately, distinct -primes can have the same radical, which obstructs one from studying them geometrically. We show that this problem can be eliminated by working with super vector spaces: doing so provides enough geometry to distinguish -primes. This yields an effective method for analyzing -primes.
期刊介绍:
The Proceedings of the London Mathematical Society is the flagship journal of the LMS. It publishes articles of the highest quality and significance across a broad range of mathematics. There are no page length restrictions for submitted papers.
The Proceedings has its own Editorial Board separate from that of the Journal, Bulletin and Transactions of the LMS.