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Moscow University Mathematics Bulletin最新文献

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Chebyshev Subspaces of Dirichlet Series Dirichlet 数列的切比雪夫子空间
IF 0.4
Moscow University Mathematics Bulletin Pub Date : 2023-12-01 DOI: 10.3103/s0027132223060037
{"title":"Chebyshev Subspaces of Dirichlet Series","authors":"","doi":"10.3103/s0027132223060037","DOIUrl":"https://doi.org/10.3103/s0027132223060037","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Haar and Kolmogorov found the necessary and sufficient conditions under which finite-dimensional subspaces in the space of continuous functions on an arbitrary compact set are Chebyshev. In this paper, it is proved that subspaces of Dirichlet series form Chebyshev subspaces in the space of <span> <span>(mathbf{C}(0,infty])</span> </span> of continuous and bounded functions in the interval <span> <span>((0,infty))</span> </span> that have a limit at infinity.</p> </span>","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140300441","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
Normalization of Terms in Sharp Models of Logic of Proofs LP 证明逻辑尖锐模型中术语的规范化 LP
IF 0.4
Moscow University Mathematics Bulletin Pub Date : 2023-12-01 DOI: 10.3103/s0027132223060049
{"title":"Normalization of Terms in Sharp Models of Logic of Proofs LP","authors":"","doi":"10.3103/s0027132223060049","DOIUrl":"https://doi.org/10.3103/s0027132223060049","url":null,"abstract":"<span> <h3>Abstract</h3> <p>A basic justification model is sharp when the evidence term constructors <span> <span>(cdot,+,!)</span> </span> in it mean exactly the application of modus ponens rule, the union and the verification of evidences. We construct an example of a sharp model for the logic of proofs <span>LP</span> and establish that in any sharp model of <span>LP</span> every proof term is equivalent to some proof polynomial.</p> </span>","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140300145","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
Existence of Infinite, Everywhere Discontinuous Spectra of Upper Exponents of Oscillation of Signs, Zeros, and Roots of Third-Order Differential Equations 三阶微分方程的符号、零点和根的振荡上指数的无限、无处不连续谱的存在性
IF 0.4
Moscow University Mathematics Bulletin Pub Date : 2023-10-01 DOI: 10.3103/s0027132223050054
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引用次数: 0
Reconstruction of the Schrödinger Operator with a Singular Potential on Half-Line by Its Prescribed Essential Spectrum 半线上具有奇异势的Schrödinger算子的规定本质谱重建
Moscow University Mathematics Bulletin Pub Date : 2023-08-01 DOI: 10.3103/s0027132223040022
G. A. Agafonkin
{"title":"Reconstruction of the Schrödinger Operator with a Singular Potential on Half-Line by Its Prescribed Essential Spectrum","authors":"G. A. Agafonkin","doi":"10.3103/s0027132223040022","DOIUrl":"https://doi.org/10.3103/s0027132223040022","url":null,"abstract":"","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055568","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
Orthorecursive Expansion with Respect to Modified Faber–Schauder System 关于修正Faber-Schauder系统的正递归展开
Moscow University Mathematics Bulletin Pub Date : 2023-08-01 DOI: 10.3103/s0027132223040095
P. S. Stepanyants, A. K. Paunov
{"title":"Orthorecursive Expansion with Respect to Modified Faber–Schauder System","authors":"P. S. Stepanyants, A. K. Paunov","doi":"10.3103/s0027132223040095","DOIUrl":"https://doi.org/10.3103/s0027132223040095","url":null,"abstract":"","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055866","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
Invariant Sums of Products of Differentials 微分积的不变和
Moscow University Mathematics Bulletin Pub Date : 2023-08-01 DOI: 10.3103/s002713222304006x
F. M. Malyshev
{"title":"Invariant Sums of Products of Differentials","authors":"F. M. Malyshev","doi":"10.3103/s002713222304006x","DOIUrl":"https://doi.org/10.3103/s002713222304006x","url":null,"abstract":"","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055865","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 the Computation Complexity of the Systems of Finite Abelian Group Elements 有限阿贝尔群元系统的计算复杂度
Moscow University Mathematics Bulletin Pub Date : 2023-08-01 DOI: 10.3103/s0027132223040034
V. V. Kochergin
{"title":"On the Computation Complexity of the Systems of Finite Abelian Group Elements","authors":"V. V. Kochergin","doi":"10.3103/s0027132223040034","DOIUrl":"https://doi.org/10.3103/s0027132223040034","url":null,"abstract":"","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055571","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
Jordan–Kronecker Invariants of Singular Pencils for Six-Dimensional Real Nilpotent Lie Algebras 六维实数幂零李代数奇异铅笔的Jordan-Kronecker不变量
Moscow University Mathematics Bulletin Pub Date : 2023-08-01 DOI: 10.3103/s0027132223040058
F. I. Lobzin
{"title":"Jordan–Kronecker Invariants of Singular Pencils for Six-Dimensional Real Nilpotent Lie Algebras","authors":"F. I. Lobzin","doi":"10.3103/s0027132223040058","DOIUrl":"https://doi.org/10.3103/s0027132223040058","url":null,"abstract":"","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055569","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
Boundedness of the Set of Solutions to a Linear Homogeneous System Uniform Along the Initial Segment 线性齐次系统沿初始段一致解集的有界性
Moscow University Mathematics Bulletin Pub Date : 2023-08-01 DOI: 10.3103/s0027132223040071
N. L. Margolina, K. E. Shiryaev
{"title":"Boundedness of the Set of Solutions to a Linear Homogeneous System Uniform Along the Initial Segment","authors":"N. L. Margolina, K. E. Shiryaev","doi":"10.3103/s0027132223040071","DOIUrl":"https://doi.org/10.3103/s0027132223040071","url":null,"abstract":"","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055567","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 the Moments of Branching Random Walk in a Random Medium with a Gumbelian Potential 具有Gumbelian势的随机介质中分支随机游走的矩
Moscow University Mathematics Bulletin Pub Date : 2023-08-01 DOI: 10.3103/s0027132223040046
V. A. Kutsenko
{"title":"On the Moments of Branching Random Walk in a Random Medium with a Gumbelian Potential","authors":"V. A. Kutsenko","doi":"10.3103/s0027132223040046","DOIUrl":"https://doi.org/10.3103/s0027132223040046","url":null,"abstract":"","PeriodicalId":42963,"journal":{"name":"Moscow University Mathematics Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055570","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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