发布求助
文献互助 智能选刊 最新文献

Cubo最新文献

筛选
英文 中文
Surjective maps preserving the reduced minimum modulus of products 保积最小模的满射映射
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.139
Sepide Hajighasemi, S. Hejazian
{"title":"Surjective maps preserving the reduced minimum modulus of products","authors":"Sepide Hajighasemi, S. Hejazian","doi":"10.56754/0719-0646.2501.139","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.139","url":null,"abstract":"Suppose $mathfrak{B}(H)$ is the Banach algebra of all bounded linear operators on a Hilbert space $H$ with $dim(H)geq 3$. Let $gamma(.)$ denote the reduced minimum modulus of an operator. We charaterize surjective maps $varphi$ on $mathfrak{B}(H)$ satisfying $$gamma(varphi(T)varphi(S))=gamma(T S);;;(T, Sin mathfrak{B}(H)).$$ Also, we give the general form of surjective maps on $mathfrak B(H)$ preserving the reduced minimum modulus of Jordan triple products of operators.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46679311","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
Inertial algorithm for solving split inclusion problem in Banach spaces 求解Banach空间中分裂包含问题的惯性算法
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.067
Ajay Kumar, Ekta Tamrakar
{"title":"Inertial algorithm for solving split inclusion problem in Banach spaces","authors":"Ajay Kumar, Ekta Tamrakar","doi":"10.56754/0719-0646.2501.067","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.067","url":null,"abstract":"The purpose of this paper is to propose an algorithm for finding a common element of the set of fixed points of relatively nonexpansive mapping and the set of solutions of split inclusion problem with a way of selecting the stepsize without prior knowledge of the operator norm in the framework of Banach spaces. Then, the main result is used to the common fixed point problems of a family of relatively nonexpansive mappings and split equilibrium problem. Finally, a numerical example is provided to illustrate the main result.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41912624","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, stability and global attractivity results for nonlinear Riemann-Liouville fractional differential equations 非线性Riemann-Liouville分数阶微分方程的存在性、稳定性和全局吸引性结果
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.023
B. Dhage, J. Graef, S. Dhage
{"title":"Existence, stability and global attractivity results for nonlinear Riemann-Liouville fractional differential equations","authors":"B. Dhage, J. Graef, S. Dhage","doi":"10.56754/0719-0646.2501.023","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.023","url":null,"abstract":"Existence, attractivity, and stability of solutions of a non-linear fractional differential equation of Riemann-Liouville type are proved using the classical Schauder fixed point theorem and a fixed point result due to Dhage. The results are illustrated with examples.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48558168","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
Cubic and quartic series with the tail of $ln 2$ 尾部为$ ln2 $的三次和四次级数
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.089
O. Furdui, A. Sîntămărian
{"title":"Cubic and quartic series with the tail of $ln 2$","authors":"O. Furdui, A. Sîntămărian","doi":"10.56754/0719-0646.2501.089","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.089","url":null,"abstract":"In this paper we calculate some remarkable cubic and quartic series involving the tail of ln2. We also evaluate several linear and quadratic series with the tail of ln2.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44613855","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
New upper estimate for positive solutions to a second order boundary value problem with a parameter 一类带参数的二阶边值问题正解的新上估计
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.121
Liancheng Wang, Bo Yang
{"title":"New upper estimate for positive solutions to a second order boundary value problem with a parameter","authors":"Liancheng Wang, Bo Yang","doi":"10.56754/0719-0646.2501.121","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.121","url":null,"abstract":"We consider a second order boundary value problem with a parameter. A new upper bound for positive solutions and Green’s function of the problem is obtained.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46532018","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 results for a class of local and nonlocal nonlinear elliptic problems 一类局部和非局部非线性椭圆型问题的存在性结果
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.001
Said Ait Temghart, C. Allalou, Adil Abbassi
{"title":"Existence results for a class of local and nonlocal nonlinear elliptic problems","authors":"Said Ait Temghart, C. Allalou, Adil Abbassi","doi":"10.56754/0719-0646.2501.001","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.001","url":null,"abstract":"In this paper, we study the $p$-Laplacian problems in the case where $p$ depends on the solution itself. We consider two situations, when $p$ is a local and nonlocal quantity. By using a singular perturbation technique, we prove the existence of weak solutions for the problem associated to the following equation $$ begin{cases} -mathrm{d}mathrm{i}mathrm{v}(|nabla u|^{p(u)-2}nabla u)+|u|^{p(u)-2}u=f & mbox{in}; Omega u=0& mbox{on}; partialOmega , end{cases}$$ and also for its nonlocal version. The main goal of this paper is to extend the results established by M. Chipot and H. B. de Oliveira (Math. Ann., 2019, 375, 283-306).","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46623044","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 and stability in nonlinear systems of differential equations using a modified variation of parameters formula 非线性微分方程系统的有界性与稳定性
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.037
Y. Raffoul
{"title":"Boundedness and stability in nonlinear systems of differential equations using a modified variation of parameters formula","authors":"Y. Raffoul","doi":"10.56754/0719-0646.2501.037","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.037","url":null,"abstract":"In this research we introduce a new variation of parameters for systems of linear and nonlinear ordinary differential equations. We use known mathematical methods and techniques including Gronwall’s inequality and fixed point theory to obtain boundedness on all solutions and stability results on the zero solution.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48615155","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
Fixed points of set-valued mappings satisfying a Banach orbital condition 满足Banach轨道条件的集值映射的不动点
IF 0.5
Cubo Pub Date : 2023-04-20 DOI: 10.56754/0719-0646.2501.151
Raúl Fierro, Sergio Pizarro
{"title":"Fixed points of set-valued mappings satisfying a Banach orbital condition","authors":"Raúl Fierro, Sergio Pizarro","doi":"10.56754/0719-0646.2501.151","DOIUrl":"https://doi.org/10.56754/0719-0646.2501.151","url":null,"abstract":"In this note, we prove a fixed point existence theorem for set-valued functions by extending the usual Banach orbital condition concept for single valued mappings. As we show, this result applies to various types of set-valued contractions existing in the literature.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43570790","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 observations on a clopen version of the Rothberger property 一些关于Rothberger属性的开放版本的观察
IF 0.5
Cubo Pub Date : 2023-03-11 DOI: 10.56754/0719-0646.2502.161
M. Bhardwaj, A. Osipov
{"title":"Some observations on a clopen version of the Rothberger property","authors":"M. Bhardwaj, A. Osipov","doi":"10.56754/0719-0646.2502.161","DOIUrl":"https://doi.org/10.56754/0719-0646.2502.161","url":null,"abstract":"In this paper, we prove that a clopen version $S_1(mathcal{C}_mathcal{O}, mathcal{C}_mathcal{O})$ of the Rothberger property and Borel strong measure zeroness are independent. For a zero-dimensional metric space $(X,d)$, $X$ satisfies $S_1(mathcal{C}_mathcal{O}, mathcal{C}_mathcal{O})$ if, and only if, $X$ has Borel strong measure zero with respect to each metric which has the same topology as $d$ has. In a zero-dimensional space, the game $G_1(mathcal{O}, mathcal{O})$ is equivalent to the game $G_1(mathcal{C}_mathcal{O}, mathcal{C}_mathcal{O})$ and the point-open game is equivalent to the point-clopen game. Using reflections, we obtain that the game $G_1(mathcal{C}_mathcal{O}, mathcal{C}_mathcal{O})$ and the point-clopen game are strategically and Markov dual. An example is given for a space on which the game $G_1(mathcal{C}_mathcal{O}, mathcal{C}_mathcal{O})$ is undetermined.","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42686314","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 minimum ergodic average and minimal systems 关于最小遍历平均值和最小系统
IF 0.5
Cubo Pub Date : 2022-12-21 DOI: 10.56754/0719-0646.2403.0457
Manuel Saavedra, H. Villavicencio
{"title":"On the minimum ergodic average and minimal systems","authors":"Manuel Saavedra, H. Villavicencio","doi":"10.56754/0719-0646.2403.0457","DOIUrl":"https://doi.org/10.56754/0719-0646.2403.0457","url":null,"abstract":"We prove some equivalences associated with the case when the average lower time is minimal. In addition, we characterize the minimal systems by means of the positivity of invariant measures on open sets and also the minimum ergodic averages. Finally, we show that a minimal system admits an open set whose measure is minimal with respect to a set of ergodic measures and its value can be chosen in [0, 1].","PeriodicalId":36416,"journal":{"name":"Cubo","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48239461","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信