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Boletim Sociedade Paranaense de Matematica最新文献

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On a new nonlinear integro-differential Fredholm-Chandrasekhar equation 一类新的非线性积分-微分Fredholm-Chandrasekhar方程
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.63023
A. Khellaf, M. Benssaad, S. Lemita
{"title":"On a new nonlinear integro-differential Fredholm-Chandrasekhar equation","authors":"A. Khellaf, M. Benssaad, S. Lemita","doi":"10.5269/bspm.63023","DOIUrl":"https://doi.org/10.5269/bspm.63023","url":null,"abstract":"This paper presents an analytical and numerical study of a new integro-differential Fredholm-Chandrasekhar equation of the second type. We suggest the conditions that ensure the existence and uniqueness of the nonlinear problem's solution. Then, we create a numerical technique based on the Nystr\"{o}m's method. The numerical application illustrates the efficiency of the proposed process.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42609134","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
Entropy solution for a nonlinear degenerate parabolic problem in weighted Sobolev space via Rothe's time-discretization approach 加权Sobolev空间非线性退化抛物型问题的Rothe时间离散熵解
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.63558
Abdelali Sabri, A. Jamea
{"title":"Entropy solution for a nonlinear degenerate parabolic problem in weighted Sobolev space via Rothe's time-discretization approach","authors":"Abdelali Sabri, A. Jamea","doi":"10.5269/bspm.63558","DOIUrl":"https://doi.org/10.5269/bspm.63558","url":null,"abstract":"In this paper, we prove the existence and uniqueness results of an entropy solution to a class of nonlinear degenerate parabolic problem with Dirichlet-type boundary condition and L1 data. The main tool used here is the Rothe's time-discretization approach combined with the theory of weighted Sobolev spaces.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46165408","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
Hermite transform for distribution and Boehmian space 分布与Boehmian空间的Hermite变换
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.62584
Deshna Loonker
{"title":"Hermite transform for distribution and Boehmian space","authors":"Deshna Loonker","doi":"10.5269/bspm.62584","DOIUrl":"https://doi.org/10.5269/bspm.62584","url":null,"abstract":"Hermite transform involves weigth function and Hermite polynomial as its kernel is discussed. The Hermite transform and its basic properties are extended to the distribution spaces and to the space of integrable Boehmian","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45700632","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 solutions to a discrete problems for fourth order nonlinear p-Laplacian via variational method 用变分方法研究了一类四阶非线性p-拉普拉斯离散问题解的存在性
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.63267
O. Hammouti, Abdelrachid El Amrouss
{"title":"Existence of solutions to a discrete problems for fourth order nonlinear p-Laplacian via variational method","authors":"O. Hammouti, Abdelrachid El Amrouss","doi":"10.5269/bspm.63267","DOIUrl":"https://doi.org/10.5269/bspm.63267","url":null,"abstract":"We consider the boundary value problem for a fourth order nonlinear p-Laplacian difference equation and to prove the existence of at least two nontrivial solutions. Our approach is mainly based on the variational method and critical point theory. One example is included to illustrate the result.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48283322","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
Left Nil Zero Semicommutative rings 左零半交换环
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.62926
Sanjiv Subba, T. Subedi
{"title":"Left Nil Zero Semicommutative rings","authors":"Sanjiv Subba, T. Subedi","doi":"10.5269/bspm.62926","DOIUrl":"https://doi.org/10.5269/bspm.62926","url":null,"abstract":"This paper introduces a class of rings called left nil zero semicommutative rings ( LNZS rings ), wherein a ring R is said to be LNZS if the left annihilator of every nilpotent element of R is an ideal of R. It is observed that reduced rings are LNZS but not the other way around. So, this paper provides some conditions for an LNZS ring to be reduced and among other results, it is proved that R is reduced if and only if the ring of upper triangular matrices over R is LNZS. Furthermore, it is shown that the polynomial ring over an LNZS may not be LNZS and so is the case of the skew polynomial over an LNZS ring. Therefore, this paper investigates the LNZS property over the polynomial extension and skew polynomial extension of an LNZS ring with some additional conditions.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49662509","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
The Cauchy problem for matrix factorization of the Helmholtz equation in a multidimensional unbounded domain 多维无界域上Helmholtz方程矩阵分解的Cauchy问题
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.63779
Davron Aslonqulovich Juraev
{"title":"The Cauchy problem for matrix factorization of the Helmholtz equation in a multidimensional unbounded domain","authors":"Davron Aslonqulovich Juraev","doi":"10.5269/bspm.63779","DOIUrl":"https://doi.org/10.5269/bspm.63779","url":null,"abstract":"In the present paper, a Carleman matrix is constructed and, on the basis of this matrix, an approximate solution of the Cauchy problem in a multidimensional unbounded domain is found in an explicit form.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46968903","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: 2
Explicit formulas for the matrix exponential 矩阵指数的显式公式
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.63692
M. Mouçouf, S. Zriaa
{"title":"Explicit formulas for the matrix exponential","authors":"M. Mouçouf, S. Zriaa","doi":"10.5269/bspm.63692","DOIUrl":"https://doi.org/10.5269/bspm.63692","url":null,"abstract":"In this work, new closed-form formulas for the matrix exponential are provided using certain polynomials which areconstructed with the help of a generalization of Hermite's interpolation formula. Our method is direct and elementary, it gives tractable and manageable formulas not current inthe extensive literature on this essential subject. Moreover, others are recuperated and generalized. Several particular cases and examples are formulated to illustrate the method presented in this paper.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45155150","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: 1
Weak and renormalized solutions for anisotropic Neumann problems with degenerate coercivity 退化矫顽力各向异性Neumann问题的弱解和重整化解
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.62362
M. B. Benboubker, Hayat Benkhalou, H. Hjiaj
{"title":"Weak and renormalized solutions for anisotropic Neumann problems with degenerate coercivity","authors":"M. B. Benboubker, Hayat Benkhalou, H. Hjiaj","doi":"10.5269/bspm.62362","DOIUrl":"https://doi.org/10.5269/bspm.62362","url":null,"abstract":"In this work, we study the following quasilinear Neumann boundary-value problem$$left{begin{array}{ll}displaystyle -sum^{N}_{i=1} D^{i}(a_{i}(x,u,nabla u))+|u|^{p_{0}-2} u= f(x,u,nabla u) & mbox{in } quad Omega,displaystyle sum^{N}_{i=1} a_{i}(x,u,nabla u)cdot n_{i} = g(x) & mbox{on } quad partialOmega,end{array}right.$$where $Omega$ is a bounded open domain in $>I!!R^{N}$, $(Ngeq 2)$. We prove the existence of a weak solution for $f in L^{infty}(Omega)$ and $gin L^{infty}(partialOmega)$ and the existence of renormalized solutions for $L^{1}$-data $f$ and $g$. The functional setting involves anisotropic Sobolev spaces with constants exponents.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48975351","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
The "Elliptic" matrices and a new kind of cryptography “椭圆”矩阵与一种新的密码学
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.62377
Zakariae Cheddour, A. Chillali, A. Mouhib
{"title":"The \"Elliptic\" matrices and a new kind of cryptography","authors":"Zakariae Cheddour, A. Chillali, A. Mouhib","doi":"10.5269/bspm.62377","DOIUrl":"https://doi.org/10.5269/bspm.62377","url":null,"abstract":"In [17], A. chillali et al introduce a new cryptographic method based on matrices over a finite field Fpn , where p is a prime number. In this paper, we will generate this method in a new group of square block matrices based on an elliptic curve, called \"elliptic\" matrices.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42939193","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: 3
On compositional dynamics on hardy space 论hardy空间上的合成动力学
IF 0.5
Boletim Sociedade Paranaense de Matematica Pub Date : 2022-12-29 DOI: 10.5269/bspm.62921
Otmane Benchiheb, N. Karim, M. Amouch
{"title":"On compositional dynamics on hardy space","authors":"Otmane Benchiheb, N. Karim, M. Amouch","doi":"10.5269/bspm.62921","DOIUrl":"https://doi.org/10.5269/bspm.62921","url":null,"abstract":"In this work, we examine super-recurrence and super-rigidity of composition operators acting on $H(mathbb{D})$ the space of holomorphic functions on the unit disk $mathbb{D}$ and on $H^2(mathbb{D})$ the Hardy-Hilbert space. We characterize the symbols that generate super-recurrent and super-rigid composition operators acting on $H(mathbb{D})$ and $H^2(mathbb{D})$.","PeriodicalId":44941,"journal":{"name":"Boletim Sociedade Paranaense de Matematica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49459603","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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