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Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry最新文献

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Semiaffine stable planes 半机械人计划
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-11-04 DOI: 10.1007/s13366-023-00720-z
Rainer Löwen, Markus J. Stroppel
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引用次数: 0
Exploring virtual versions of H-supplemented and NS-modules 探索h -补充和ns模块的虚拟版本
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-10-24 DOI: 10.1007/s13366-023-00719-6
Samira Asgari, Yahya Talebi, Ali Reza Moniri Hamzekolaee
{"title":"Exploring virtual versions of H-supplemented and NS-modules","authors":"Samira Asgari, Yahya Talebi, Ali Reza Moniri Hamzekolaee","doi":"10.1007/s13366-023-00719-6","DOIUrl":"https://doi.org/10.1007/s13366-023-00719-6","url":null,"abstract":"","PeriodicalId":44678,"journal":{"name":"Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135316000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Brauer groups and Picard groups of the moduli of parabolic vector bundles on a nodal curve 节曲线上抛物矢量束模的Brauer群和Picard群
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-10-12 DOI: 10.1007/s13366-023-00718-7
Usha N. Bhosle
{"title":"Brauer groups and Picard groups of the moduli of parabolic vector bundles on a nodal curve","authors":"Usha N. Bhosle","doi":"10.1007/s13366-023-00718-7","DOIUrl":"https://doi.org/10.1007/s13366-023-00718-7","url":null,"abstract":"","PeriodicalId":44678,"journal":{"name":"Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135969438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generalized derivations with nilpotent values on Lie ideals in semiprime rings 半素数环上李理想上幂零值的广义导数
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-09-27 DOI: 10.1007/s13366-023-00715-w
Francesco Ammendolia, Giovanni Scudo
{"title":"Generalized derivations with nilpotent values on Lie ideals in semiprime rings","authors":"Francesco Ammendolia, Giovanni Scudo","doi":"10.1007/s13366-023-00715-w","DOIUrl":"https://doi.org/10.1007/s13366-023-00715-w","url":null,"abstract":"","PeriodicalId":44678,"journal":{"name":"Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135537674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On homogeneous $$eta $$-Einstein almost cosymplectic manifolds 齐次$$eta $$ -爱因斯坦几乎余辛流形
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-09-22 DOI: 10.1007/s13366-023-00717-8
Antonio Lotta
{"title":"On homogeneous $$eta $$-Einstein almost cosymplectic manifolds","authors":"Antonio Lotta","doi":"10.1007/s13366-023-00717-8","DOIUrl":"https://doi.org/10.1007/s13366-023-00717-8","url":null,"abstract":"Abstract We prove that every compact, homogeneous $$eta $$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mi>η</mml:mi> </mml:math> -Einstein almost cosymplectic manifold is a cosymplectic manifold.","PeriodicalId":44678,"journal":{"name":"Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136060810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
S-fusible rings S-fusible环
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-09-20 DOI: 10.1007/s13366-023-00716-9
Mohamed Es-saidi, Najib Mahdou, Ünsal Tekir
{"title":"S-fusible rings","authors":"Mohamed Es-saidi, Najib Mahdou, Ünsal Tekir","doi":"10.1007/s13366-023-00716-9","DOIUrl":"https://doi.org/10.1007/s13366-023-00716-9","url":null,"abstract":"","PeriodicalId":44678,"journal":{"name":"Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136313824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On pseudo-Hermitian quadratic nilpotent lie algebras 关于伪厄密二次幂零李代数
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-09-14 DOI: 10.1007/s13366-023-00714-x
Mustapha Bachaou, Ignacio Bajo, Mohamed Louzari
{"title":"On pseudo-Hermitian quadratic nilpotent lie algebras","authors":"Mustapha Bachaou, Ignacio Bajo, Mohamed Louzari","doi":"10.1007/s13366-023-00714-x","DOIUrl":"https://doi.org/10.1007/s13366-023-00714-x","url":null,"abstract":"Abstract We study nilpotent Lie algebras endowed with a complex structure and a quadratic structure which is pseudo-Hermitian for the given complex structure. We propose several methods to construct such Lie algebras and describe a method of double extension by planes to get an inductive description of all of them. As an application, we give a complete classification of nilpotent quadratic Lie algebras where the metric is Lorentz-Hermitian and we fully classify all nilpotent pseudo-Hermitian quadratic Lie algebras up to dimension 8 and their inequivalent pseudo-Hermitian metrics.","PeriodicalId":44678,"journal":{"name":"Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134910947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Some thoughts and experiments on Bergman’s compact amalgamation problem 关于Bergman紧致合并问题的一些思考和实验
Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry Pub Date : 2023-09-13 DOI: 10.1007/s13366-023-00709-8
Michael Joswig, Mario Kummer, Andreas Thom, Claudia He Yun
{"title":"Some thoughts and experiments on Bergman’s compact amalgamation problem","authors":"Michael Joswig, Mario Kummer, Andreas Thom, Claudia He Yun","doi":"10.1007/s13366-023-00709-8","DOIUrl":"https://doi.org/10.1007/s13366-023-00709-8","url":null,"abstract":"Abstract We study the question whether copies of $$S^{1}$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:msup> <mml:mi>S</mml:mi> <mml:mn>1</mml:mn> </mml:msup> </mml:math> in $$textrm{SU}(3)$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mtext>SU</mml:mtext> <mml:mo>(</mml:mo> <mml:mn>3</mml:mn> <mml:mo>)</mml:mo> </mml:mrow> </mml:math> can be amalgamated in a compact group. This is the simplest instance of a fundamental open problem in the theory of compact groups raised by George Bergman in 1987. Considerable computational experiments suggest that the answer is positive in this case. We obtain a positive answer for a relaxed problem using theoretical considerations.","PeriodicalId":44678,"journal":{"name":"Beitrage zur Algebra und Geometrie-Contributions to Algebra and Geometry","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135734946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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