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Real Hypersurfaces in ℂP 2 and ℂH 2 with Cyclic Parallel ∗-Ricci Tensor 具有循环平行* -Ricci张量的π π和π h2中的实超曲面
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-09-27 DOI: 10.1556/012.2021.58.3.1501
Yaning Wang, Wenjie Wang
{"title":"Real Hypersurfaces in ℂP 2 and ℂH 2 with Cyclic Parallel ∗-Ricci Tensor","authors":"Yaning Wang, Wenjie Wang","doi":"10.1556/012.2021.58.3.1501","DOIUrl":"https://doi.org/10.1556/012.2021.58.3.1501","url":null,"abstract":"In this paper, we prove that the ∗-Ricci tensor of a real hypersurface in complex projective plane ℂP\u0000 2 or complex hyperbolic plane ℂH\u0000 2 is cyclic parallel if and only if the hypersurface is of type (A). We find some three-dimensional real hypersurfaces having non-vanishing and non-parallel ∗-Ricci tensors which are cyclic parallel.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75633378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Note on Visible Islands 关于可见岛屿的笔记
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-08-31 DOI: 10.1556/012.2022.01524
Sophie Leuchtner, Carlos M. Nicolás, Andrew Suk
{"title":"A Note on Visible Islands","authors":"Sophie Leuchtner, Carlos M. Nicolás, Andrew Suk","doi":"10.1556/012.2022.01524","DOIUrl":"https://doi.org/10.1556/012.2022.01524","url":null,"abstract":"Given a finite point set P in the plane, a subset S⊆P is called an island in P if conv(S) ⋂ P = S. We say that S ⊂ P is a visible island if the points in S are pairwise visible and S is an island in P. The famous Big-line Big-clique Conjecture states that for any k ≥ 3 and l ≥ 4, there is an integer n = n(k, l), such that every finite set of at least n points in the plane contains l collinear points or k pairwise visible points. In this paper, we show that this conjecture is false for visible islands, by replacing each point in a Horton set by a triple of collinear points. Hence, there are arbitrarily large finite point sets in the plane with no 4 collinear members and no visible island of size 13.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86116615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Some Landau–Kolmogorov Type Inequalities for Differential Operators Generated by Polynomials 由多项式生成的微分算子的若干Landau-Kolmogorov型不等式
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1497
V. N. Huy, Nguyễn Ngoc Huy, Chu Van Tiep
{"title":"Some Landau–Kolmogorov Type Inequalities for Differential Operators Generated by Polynomials","authors":"V. N. Huy, Nguyễn Ngoc Huy, Chu Van Tiep","doi":"10.1556/012.2021.58.2.1497","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1497","url":null,"abstract":"In this paper, we establish some Landau–Kolmogorov type inequalities for differential operators generated by polynomials in the following formfor all , where 0 < g ≤ p ≤ ∞, and the differential operator P (D) is obtained from the polynomial P (x) by substituting . Moreover, the explicit form of and are given.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75781882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nearly s-Semipermutable Subgroups 近s-半置换子群
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1491
Changwen Li
{"title":"Nearly s-Semipermutable Subgroups","authors":"Changwen Li","doi":"10.1556/012.2021.58.2.1491","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1491","url":null,"abstract":"In this paper, we investigate the infiuence of nearly s-semipermutable subgroups on the structure of finite groups. Several recent results from the literature are improved and generalized.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73173856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ideals of Residuated Lattices 剩余格的理想
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1493
L. Holdon, A. Saeid
{"title":"Ideals of Residuated Lattices","authors":"L. Holdon, A. Saeid","doi":"10.1556/012.2021.58.2.1493","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1493","url":null,"abstract":"In this article, we study ideals in residuated lattice and present a characterization theorem for them. We investigate some related results between the obstinate ideals and other types of ideals of a residuated lattice, likeness Boolean, primary, prime, implicative, maximal and ʘ-prime ideals. Characterization theorems and extension property for obstinate ideal are stated and proved. For the class of ʘ-residuated lattices, by using the ʘ-prime ideals we propose a characterization, and prove that an ideal is an ʘ-prime ideal iff its quotient algebra is an ʘ-residuated lattice. Finally, by using ideals, the class of Noetherian (Artinian) residuated lattices is introduced and Cohen’s theorem is proved.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79787938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Interpolation by Differences In H∞ H∞差分插值
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1482
F. Tugores, L. Tugores
{"title":"Interpolation by Differences In H∞","authors":"F. Tugores, L. Tugores","doi":"10.1556/012.2021.58.2.1482","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1482","url":null,"abstract":"We pose an interpolation problem for the space of bounded analytic functions in the disk. The interpolation is performed by a function and its di˛erence of values in points whose subscripts are related by an increasing application. We impose that the data values satisfy certain conditions related to the pseudohyperbolic distance, and characterize interpolating sequences in terms of uniformly separated subsequences.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75243567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Weak Solutions for Obstacle Problems with Weak Monotonicity 弱单调障碍问题的弱解
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1492
Farah Balaadich, E. Azroul
{"title":"Weak Solutions for Obstacle Problems with Weak Monotonicity","authors":"Farah Balaadich, E. Azroul","doi":"10.1556/012.2021.58.2.1492","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1492","url":null,"abstract":"This paper is concerned with the existence of weak solutions for obstacle problems. By means of the Young measure theory and a theorem of Kinderlehrer and Stampacchia, we obtain the needed result.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82045897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Unified Version of Weighted Weak Type Inequality for Martingale Maximal Operators 鞅极大算子的加权弱型不等式的统一形式
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1495
Yanbo B. Ren, Congbian Ma
{"title":"A Unified Version of Weighted Weak Type Inequality for Martingale Maximal Operators","authors":"Yanbo B. Ren, Congbian Ma","doi":"10.1556/012.2021.58.2.1495","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1495","url":null,"abstract":"Let ɣ and Φ1 be nondecreasing and nonnegative functions defined on [0, ∞), and Φ2 is an N -function, u, v and w are weights. A unified version of weighted weak type inequality of the formfor martingale maximal operators f ∗ is considered, some necessary and su@cient conditions for it to hold are shown. In addition, we give a complete characterization of three-weight weak type maximal inequality of martingales. Our results generalize some known results on weighted theory of martingale maximal operators.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80573668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polynomial Entropy of the Logistic Map Logistic映射的多项式熵
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1494
Milan Perić
{"title":"Polynomial Entropy of the Logistic Map","authors":"Milan Perić","doi":"10.1556/012.2021.58.2.1494","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1494","url":null,"abstract":"We study the polynomial entropy of the logistic map depending on a parameter, and we calculate it for almost all values of the parameter. We show that polynomial entropy distinguishes systems with a low complexity (i.e. for which the topological entropy vanishes).","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81254989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Finite Groups with Some Subgroups of Sylow Subgroups s∗-Semipermutable 有限群与Sylow子群s * -半置换的若干子群
IF 0.7 4区 数学
Studia Scientiarum Mathematicarum Hungarica Pub Date : 2021-06-29 DOI: 10.1556/012.2021.58.2.1490
Q. Kong, Xiuyun Guo
{"title":"Finite Groups with Some Subgroups of Sylow Subgroups s∗-Semipermutable","authors":"Q. Kong, Xiuyun Guo","doi":"10.1556/012.2021.58.2.1490","DOIUrl":"https://doi.org/10.1556/012.2021.58.2.1490","url":null,"abstract":"We introduce a new subgroup embedding property in a finite group called s∗-semipermutability. Suppose that G is a finite group and H is a subgroup of G. H is said to be s∗-semipermutable in G if there exists a subnormal subgroup K of G such that G = HK and H ∩ K is s-semipermutable in G. We fix in every non-cyclic Sylow subgroup P of G some subgroup D satisfying 1 < |D| < |P | and study the structure of G under the assumption that every subgroup H of P with |H | = |D| is s∗-semipermutable in G. Some recent results are generalized and unified.","PeriodicalId":51187,"journal":{"name":"Studia Scientiarum Mathematicarum Hungarica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85921359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","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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