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Approximation via statistical $K_{a}^{2}$-convergence on two-dimensional weighted spaces 二维加权空间上的统计$K_{a}^{2}$收敛逼近
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-02-22 DOI: 10.33044/revuma.2010
S. Yildiz
{"title":"Approximation via statistical $K_{a}^{2}$-convergence on two-dimensional weighted spaces","authors":"S. Yildiz","doi":"10.33044/revuma.2010","DOIUrl":"https://doi.org/10.33044/revuma.2010","url":null,"abstract":"","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48730125","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 relations between the skew spectrum of an oriented graph and the spectrum of certain closely associated signed graphs 研究了有向图的偏谱与密切相关的符号图的谱之间的关系
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-02-22 DOI: 10.33044/revuma.1914
Z. Stanić
{"title":"Some relations between the skew spectrum of an oriented graph and the spectrum of certain closely associated signed graphs","authors":"Z. Stanić","doi":"10.33044/revuma.1914","DOIUrl":"https://doi.org/10.33044/revuma.1914","url":null,"abstract":"Let RG′ be the vertex-edge incidence matrix of an oriented graph G′. Let Λ(Ḟ ) be the signed graph whose vertices are identified as the edges of a signed graph Ḟ , with a pair of vertices being adjacent by a positive (resp. negative) edge if and only if the corresponding edges of Ġ are adjacent and have the same (resp. different) sign. In this paper, we prove that G′ is bipartite if and only if there exists a signed graph Ḟ such that R G′ RG′ − 2I is the adjacency matrix of Λ(Ḟ ). It occurs that Ḟ is fully determined by G′. As an application, in some particular cases we express the skew eigenvalues of G′ in terms of the eigenvalues of Ḟ . We also establish some upper bounds for the skew spectral radius of G′ in both the bipartite and the non-bipartite case.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44281268","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
Strongly aperiodic SFTs on hyperbolic groups: where to find them and why we love them 双曲群上的强非周期sft:在哪里可以找到它们以及我们为什么喜欢它们
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-02-01 DOI: 10.33044/revuma.3155
Y. Rieck
{"title":"Strongly aperiodic SFTs on hyperbolic groups: where to find them and why we love them","authors":"Y. Rieck","doi":"10.33044/revuma.3155","DOIUrl":"https://doi.org/10.33044/revuma.3155","url":null,"abstract":"D. B. Cohen, C. Goodman-Strauss, and the author proved that a hyperbolic group admits an\"SA SFT\"if and only if it has at most one end. This paper has two distinct parts: the first is a conversation explaining what an SA SFT is and how they may be of use. In the second part I attempt to explain both old and new ideas that go into the proof. References to specific claims in the original paper are given, with the hope that any interested reader may be able to find the details there more accessible after reading this exposition.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41672293","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
A canonical distribution on isoparametric submanifolds II 等参子流形上的一个正则分布Ⅱ
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2021-12-30 DOI: 10.33044/revuma.1799
C. Sánchez
{"title":"A canonical distribution on isoparametric submanifolds II","authors":"C. Sánchez","doi":"10.33044/revuma.1799","DOIUrl":"https://doi.org/10.33044/revuma.1799","url":null,"abstract":". The present paper continues our previous work [ Rev. Un. Mat. Argentina 61 (2020), no. 1, 113–130], which was devoted to showing that on every compact, connected homogeneous isoparametric submanifold M of codimension h ≥ 2 in a Euclidean space, there exists a canonical distribution which is bracket generating of step 2. In that work this fact was established for the case when the system of restricted roots is reduced. Here we complete the proof of the main result for the case in which the system of restricted roots is ( BC ) q , i.e., non-reduced.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":"60 39","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41285337","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 new trigonometric distribution with bounded support and an application 一种新的有界支持三角分布及其应用
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2021-12-21 DOI: 10.33044/revuma.1872
Ahmed M. T. Abd El-Bar, H. Bakouch, S. Chowdhury
{"title":"A new trigonometric distribution with bounded support and an application","authors":"Ahmed M. T. Abd El-Bar, H. Bakouch, S. Chowdhury","doi":"10.33044/revuma.1872","DOIUrl":"https://doi.org/10.33044/revuma.1872","url":null,"abstract":". In this paper, we introduce a new bounded distribution by using trigonometric functions, named the cosine-sine distribution. A comprehen- sive study of its statistical properties is presented along with an application to a unit-interval data set, namely firms risk management cost-effectiveness data. The proposed distribution has increasing, bathtub and v hazard rate shapes. Further, we show that the distribution can be viewed as a truncated exponential sine distribution.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45578238","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: 2
Note on the generalized conformable derivative 关于广义相容导数的注意事项
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2021-12-16 DOI: 10.33044/revuma.1930
Alberto Fleitas, J. E. Nápoles Valdés, José M. Rodríguez, José María Sigarreta-Almira
{"title":"Note on the generalized conformable derivative","authors":"Alberto Fleitas, J. E. Nápoles Valdés, José M. Rodríguez, José María Sigarreta-Almira","doi":"10.33044/revuma.1930","DOIUrl":"https://doi.org/10.33044/revuma.1930","url":null,"abstract":". We introduce a definition of a generalized conformable derivative of order α > 0 (where this parameter does not need to be integer), with which we overcome some deficiencies of known local derivatives, conformable or not. This definition allows us to compute fractional derivatives of functions defined on any open set on the real line (and not just on the positive half-line). Moreover, we extend some classical results to the context of fractional derivatives. Also, we obtain results for the case α > 1.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42302383","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: 13
A generalization of primary ideals and strongly prime submodules 初等理想与强素数子模的推广
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2021-12-03 DOI: 10.33044/revuma.1783
Afroozeh Jafari, M. Baziar, S. Safaeeyan
{"title":"A generalization of primary ideals and strongly prime submodules","authors":"Afroozeh Jafari, M. Baziar, S. Safaeeyan","doi":"10.33044/revuma.1783","DOIUrl":"https://doi.org/10.33044/revuma.1783","url":null,"abstract":"We present ∗-primary submodules, a generalization of the concept of primary submodules of an R-module. We show that every primary submodule of a Noetherian R-module is ∗-primary. Among other things, we show that over a commutative domain R, every torsion free R-module is ∗-primary. Furthermore, we show that in a cyclic R-module, primary and ∗-primary coincide. Moreover, we give a characterization of ∗-primary submodules for some finitely generated free R-modules.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46647707","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
Linear maps preserving Drazin inverses of matrices over local rings 局部环上保持矩阵Drazin逆的线性映射
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2021-11-23 DOI: 10.33044/revuma.1858
T. Calci, Huanyin Chen, S. Halicioglu, Guo Shile
{"title":"Linear maps preserving Drazin inverses of matrices over local rings","authors":"T. Calci, Huanyin Chen, S. Halicioglu, Guo Shile","doi":"10.33044/revuma.1858","DOIUrl":"https://doi.org/10.33044/revuma.1858","url":null,"abstract":"","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46514563","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
Interpolation theory for the HK-Fourier transform HK傅立叶变换的插值理论
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2021-11-09 DOI: 10.33044/revuma.1911
J. H. Arredondo, Alfredo Reyes
{"title":"Interpolation theory for the HK-Fourier transform","authors":"J. H. Arredondo, Alfredo Reyes","doi":"10.33044/revuma.1911","DOIUrl":"https://doi.org/10.33044/revuma.1911","url":null,"abstract":". We use the Henstock–Kurzweil integral and interpolation theory to extend the Fourier cosine transform operator, broadening some classical properties such as the Riemann–Lebesgue lemma. Furthermore, we show that a qualitative difference between the cosine and sine transform is preserved on differentiable functions.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49172831","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
Real hypersurfaces in the complex hyperbolic quadric with Reeb invariant Ricci tensor 具有Reeb不变Ricci张量的复双曲二次曲面的实超曲面
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2021-11-08 DOI: 10.33044/revuma.1975
Doo Hyun Hwang, Hyunjin Lee, Y. Suh
{"title":"Real hypersurfaces in the complex hyperbolic quadric with Reeb invariant Ricci tensor","authors":"Doo Hyun Hwang, Hyunjin Lee, Y. Suh","doi":"10.33044/revuma.1975","DOIUrl":"https://doi.org/10.33044/revuma.1975","url":null,"abstract":". We first give the notion of Reeb invariant Ricci tensor for real hypersurfaces M in the complex quadric Q m ∗ = SO 02 ,m /SO 2 SO m , which is defined by L ξ Ric = 0, where Ric denotes the Ricci tensor of M in Q m ∗ , and L ξ the Lie derivative along the direction of the Reeb vector field ξ = − JN . Next we give a complete classification of real hypersurfaces in the complex hyperbolic quadric Q m ∗ = SO 02 ,m /SO 2 SO m with Reeb invariant Ricci tensor.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47957745","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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