{"title":"Representations of non-finitely graded Lie algebras related to Virasoro algebra","authors":"Chunguang Xia, Tianyu Ma, Xiao Dong, Mingjing Zhang","doi":"10.1515/forum-2023-0320","DOIUrl":null,"url":null,"abstract":"In this paper, we study representations of non-finitely graded Lie algebras <jats:inline-formula> <jats:alternatives> <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\"> <m:mrow> <m:mi mathvariant=\"script\">𝒲</m:mi> <m:mo></m:mo> <m:mrow> <m:mo stretchy=\"false\">(</m:mo> <m:mi>ϵ</m:mi> <m:mo stretchy=\"false\">)</m:mo> </m:mrow> </m:mrow> </m:math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"graphic/j_forum-2023-0320_eq_0340.png\"/> <jats:tex-math>{\\mathcal{W}(\\epsilon)}</jats:tex-math> </jats:alternatives> </jats:inline-formula> related to Virasoro algebra, where <jats:inline-formula> <jats:alternatives> <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\"> <m:mrow> <m:mi>ϵ</m:mi> <m:mo>=</m:mo> <m:mrow> <m:mo>±</m:mo> <m:mn>1</m:mn> </m:mrow> </m:mrow> </m:math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"graphic/j_forum-2023-0320_eq_0321.png\"/> <jats:tex-math>{\\epsilon=\\pm 1}</jats:tex-math> </jats:alternatives> </jats:inline-formula>. Precisely speaking, we completely classify the free <jats:inline-formula> <jats:alternatives> <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\"> <m:mrow> <m:mi mathvariant=\"script\">𝒰</m:mi> <m:mo></m:mo> <m:mrow> <m:mo stretchy=\"false\">(</m:mo> <m:mi>𝔥</m:mi> <m:mo stretchy=\"false\">)</m:mo> </m:mrow> </m:mrow> </m:math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"graphic/j_forum-2023-0320_eq_0333.png\"/> <jats:tex-math>{\\mathcal{U}(\\mathfrak{h})}</jats:tex-math> </jats:alternatives> </jats:inline-formula>-modules of rank one over <jats:inline-formula> <jats:alternatives> <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\"> <m:mrow> <m:mi mathvariant=\"script\">𝒲</m:mi> <m:mo></m:mo> <m:mrow> <m:mo stretchy=\"false\">(</m:mo> <m:mi>ϵ</m:mi> <m:mo stretchy=\"false\">)</m:mo> </m:mrow> </m:mrow> </m:math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"graphic/j_forum-2023-0320_eq_0340.png\"/> <jats:tex-math>{\\mathcal{W}(\\epsilon)}</jats:tex-math> </jats:alternatives> </jats:inline-formula>, and find that these module structures are rather different from those of other graded Lie algebras. We also determine the simplicity and isomorphism classes of these modules.","PeriodicalId":12433,"journal":{"name":"Forum Mathematicum","volume":"45 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Forum Mathematicum","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1515/forum-2023-0320","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
Abstract
In this paper, we study representations of non-finitely graded Lie algebras 𝒲(ϵ){\mathcal{W}(\epsilon)} related to Virasoro algebra, where ϵ=±1{\epsilon=\pm 1}. Precisely speaking, we completely classify the free 𝒰(𝔥){\mathcal{U}(\mathfrak{h})}-modules of rank one over 𝒲(ϵ){\mathcal{W}(\epsilon)}, and find that these module structures are rather different from those of other graded Lie algebras. We also determine the simplicity and isomorphism classes of these modules.
期刊介绍:
Forum Mathematicum is a general mathematics journal, which is devoted to the publication of research articles in all fields of pure and applied mathematics, including mathematical physics. Forum Mathematicum belongs to the top 50 journals in pure and applied mathematics, as measured by citation impact.