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Turkish Journal of Mathematics最新文献

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Blow-up of solutions for wave equation with multiple ?(x)-Laplacian and variable exponent nonlinearities 多重拉普拉斯变指数非线性波动方程解的爆破
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3409
A. Khaldi, Amar Ouaoua, M. Maouni
{"title":"Blow-up of solutions for wave equation with multiple ?(x)-Laplacian and variable exponent nonlinearities","authors":"A. Khaldi, Amar Ouaoua, M. Maouni","doi":"10.55730/1300-0098.3409","DOIUrl":"https://doi.org/10.55730/1300-0098.3409","url":null,"abstract":": We consider an initial value problem related to the equation","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43943490","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
Numerical solution for Benjamin-Bona-Mahony-Burgers equation with Strang time-splitting technique 用Strang时间分裂技术求解Benjamin-Bona-Mahony-Burgers方程
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3377
Melike Karta
{"title":"Numerical solution for Benjamin-Bona-Mahony-Burgers equation with Strang time-splitting technique","authors":"Melike Karta","doi":"10.55730/1300-0098.3377","DOIUrl":"https://doi.org/10.55730/1300-0098.3377","url":null,"abstract":": In the present manuscript, the Benjamin-Bona-Mahony-Burgers (BBMB) equation will be handled numerically by Strang time-splitting technique. While applying this technique, collocation method based on quintic B-spline basis functions is applied. In line with our purpose, after splitting the BBM-Burgers equation given with appropriate initial boundary conditions into two subequations containing the derivative in terms of time, the quintic B-spline based collocation finite element method (FEM) for spatial discretization and the suitable finite difference approaches for time discretization is applied to each subequation and hereby two different systems of algebraic equations are obtained. Four test problems are utilized to test the efficiency and reliability of the presented method. The error norms L 2 and L ∞ with mass, energy, and momentum conservation constants I 1 , I 2 and I 3 , respectively, are computed. To do a comparison with the other studies in the literature, the newly found approximate solutions are exhibited in both tabular and graphical formats. Also, stability analysis of numerical approach by the von Neumann method is researched.","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42273138","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 remarks on parameterized inequalities involving conformable fractional operators 关于包含符合分数算子的参数化不等式的一些注释
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3381
Cihan Ünal, F. Hezenci, H. Budak
{"title":"Some remarks on parameterized inequalities involving conformable fractional operators","authors":"Cihan Ünal, F. Hezenci, H. Budak","doi":"10.55730/1300-0098.3381","DOIUrl":"https://doi.org/10.55730/1300-0098.3381","url":null,"abstract":"","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42379221","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 note on $ss$-supplement submodules 关于$ss$-补定子模块的一个注记
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3374
Emi̇ne Önal Kir
{"title":"A note on $ss$-supplement submodules","authors":"Emi̇ne Önal Kir","doi":"10.55730/1300-0098.3374","DOIUrl":"https://doi.org/10.55730/1300-0098.3374","url":null,"abstract":"","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47692244","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 calculus for intuitionistic fuzzy values 直觉模糊值的演算
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3392
E. Yavuz
{"title":"A calculus for intuitionistic fuzzy values","authors":"E. Yavuz","doi":"10.55730/1300-0098.3392","DOIUrl":"https://doi.org/10.55730/1300-0098.3392","url":null,"abstract":"We introduce ⊕ calculus and ⊗ calculus for intuitionistic fuzzy values and prove some basic theorems by using multiplicative calculus which has useful tools to represent the concepts of introduced calculi. Besides, we construct some isomorphic mappings to interpret the relationships between ⊕ calculus and ⊗ calculus. This paper reveals also new calculi for fuzzy sets in particular.","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43601070","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
Geodesics and isocline distributions in tangent bundles of nonflat Lorentzian-Heisenberg spaces 非平坦洛伦兹-海森堡空间切束中的测地线和等斜线分布
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3356
M. Altunbaş
{"title":"Geodesics and isocline distributions in tangent bundles of nonflat Lorentzian-Heisenberg spaces","authors":"M. Altunbaş","doi":"10.55730/1300-0098.3356","DOIUrl":"https://doi.org/10.55730/1300-0098.3356","url":null,"abstract":": Let ( H 3 , g 1 ) and ( H 3 , g 2 ) be the Lorentzian-Heisenberg spaces with nonflat metrics g 1 and g 2 , and ( TH 3 , g s 1 ) , ( TH 3 , g s 2 ) be their tangent bundles with the Sasaki metric, respectively. In the present paper, we find nontotally geodesic distributions in tangent bundles by using lifts of contact forms from the base manifold H 3 . We give examples for totally geodesic but not isocline distributions. We study the geodesics of tangent bundles by considering horizontal and natural lifts of geodesics of the base manifold H 3 . We also investigate more general classes of geodesics which are not obtained from horizontal and natural lifts of geodesics.","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41817007","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
Qualitative study of a second order difference equation 一类二阶差分方程的定性研究
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3375
Messaoud Berkal, J. F. Navarro
{"title":"Qualitative study of a second order difference equation","authors":"Messaoud Berkal, J. F. Navarro","doi":"10.55730/1300-0098.3375","DOIUrl":"https://doi.org/10.55730/1300-0098.3375","url":null,"abstract":": In this paper, we study a second order rational difference equation. We analyze the stability of the unique positive equilibrium of the equation and prove the existence of a Neimark-Sacker bifurcation, validating our theoretical analysis via a numerical exploration of the system","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44379203","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
Bipolar soft ideal rough set with applications in COVID-19 双极软理想粗糙集在COVID-19中的应用
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3343
H. Mustafa
{"title":"Bipolar soft ideal rough set with applications in COVID-19","authors":"H. Mustafa","doi":"10.55730/1300-0098.3343","DOIUrl":"https://doi.org/10.55730/1300-0098.3343","url":null,"abstract":"Bipolar soft rough set represents an important mathematical model to deal with uncertainty. This theory represents a link between bipolar soft set and rough set theories. This study introduced the concept of topological bipolar soft set by combining a bipolar soft set with topologies. Also, the topological structure of bipolar soft rough set has been discussed by defining the bipolar soft rough topology. The main objective of this paper is to present some solutions to develop and modify the approach of the bipolar soft rough sets. Two kinds of bipolar soft ideal approximation operators which represent extensions of bipolar soft rough approximation operator have been presented. Moreover, a new kind of bipolar approximation space via two ideals, called bipolar soft biideal approximation space, was introduced and studied by two different methods. Their properties are discussed and the relationships between these methods and the previous ones are proposed. The importance of these methods is reducing the vagueness of uncertainty areas by increasing the bipolar lower approximations and decreasing the bipolar upper approximations. Also, the bipolar soft biideal rough sets represent two opinions instead of one opinion. Finally, an application in multicriteria group decision making (MCGDM) in COVID-19 by using bipolar soft ideal rough sets is suggested by using two methods. [ FROM AUTHOR]","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47713588","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
Duality Approach to the Regularity Problems for the Navier-Stokes Equations Navier-Stokes方程正则性问题的对偶方法
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3402
G. Seregin
{"title":"Duality Approach to the Regularity Problems for the Navier-Stokes Equations","authors":"G. Seregin","doi":"10.55730/1300-0098.3402","DOIUrl":"https://doi.org/10.55730/1300-0098.3402","url":null,"abstract":": In this note, we describe a way to study local regularity of a weak solution to the Navier-Stokes equations, satisfying the simplest scale-invariant restriction, with the help of zooming and duality approach to the corresponding mild bounded ancient solution","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44899877","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
The set of Arf numerical semigroups with given Frobenius number 给定Frobenius数的Arf数值半群的集合
IF 1 4区 数学
Turkish Journal of Mathematics Pub Date : 2023-01-01 DOI: 10.55730/1300-0098.3436
M. A. Moreno-Fr'ias, J. Rosales
{"title":"The set of Arf numerical semigroups with given Frobenius number","authors":"M. A. Moreno-Fr'ias, J. Rosales","doi":"10.55730/1300-0098.3436","DOIUrl":"https://doi.org/10.55730/1300-0098.3436","url":null,"abstract":"In this work we will show that if $F$ is a positive integer, then the set ${mathrm{Arf}}(F)={Smid S mbox{ is an Arf numerical semigroup with Frobenius number } F}$ verifies the following conditions: 1) $Delta(F)={0,F+1,rightarrow}$ is the minimum of ${mathrm{Arf}}(F),$ 2) if ${S, T} subseteq {mathrm{Arf}}(F)$, then $S cap T in {mathrm{Arf}}(F),$ 3) if $S in {mathrm{Arf}}(F),$ $Sneq Delta(F)$ and ${mathrm m}(S)=min (S backslash {0})$, then $Sbackslash {{mathrm m}(S)} in {mathrm{Arf}}(F)$. The previous results will be used to give an algorithm which calculates the set ${mathrm{Arf}}(F).$ Also we will see that if $Xsubseteq Sbackslash Delta(F)$ for some $Sin {mathrm{Arf}}(F),$ then there is the smallest element of ${mathrm{Arf}}(F)$ containing $X.$","PeriodicalId":51206,"journal":{"name":"Turkish Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45030753","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
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