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Dynamic behavior of vector solutions of a class of 2-D neutral differential systems 一类二维中性微分系统矢量解的动态行为
IF 0.3
Mathematica Bohemica Pub Date : 2024-07-18 DOI: 10.21136/mb.2024.0156-23
Arun Kumar Tripathy, Shibanee Sahu
{"title":"Dynamic behavior of vector solutions of a class of 2-D neutral differential systems","authors":"Arun Kumar Tripathy, Shibanee Sahu","doi":"10.21136/mb.2024.0156-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0156-23","url":null,"abstract":". This work deals with the analysis pertaining some dynamic behavior of vector solutions of first order two-dimensional neutral delay differential systems of the form","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141824202","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
Global well-posedness and energy decay for a one dimensional porous-elastic system subject to a neutral delay 受中性延迟影响的一维多孔弹性系统的全局良好性和能量衰减
IF 0.3
Mathematica Bohemica Pub Date : 2024-07-02 DOI: 10.21136/mb.2024.0104-23
H. Khochemane, Sara Labidi, Sami Loucif, A. Djebabla
{"title":"Global well-posedness and energy decay for a one dimensional porous-elastic\u0000 \u0000system subject to a neutral delay","authors":"H. Khochemane, Sara Labidi, Sami Loucif, A. Djebabla","doi":"10.21136/mb.2024.0104-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0104-23","url":null,"abstract":". We consider a one-dimensional porous-elastic system with porous-viscosity and a distributed delay of neutral type. First, we prove the global existence and uniqueness of the solution by using the Faedo-Galerkin approximations along with some energy estimates. Then, based on the energy method with some appropriate assumptions on the kernel of neutral delay term, we construct a suitable Lyapunov functional and we prove that, despite of the destructive nature of delays in general, the damping mechanism considered provokes an exponential decay of the solution for the case of equal speed of wave propagation. In the case of lack of exponential stability, we show that the solution decays polynomially.","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141686180","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 forbidden configuration of pseudomodular lattices 关于伪模态网格的禁止配置
IF 0.3
Mathematica Bohemica Pub Date : 2024-07-01 DOI: 10.21136/mb.2024.0126-23
Manoj Dhake, Sachin Ballal, V. Kharat, R. Shewale
{"title":"On forbidden configuration of pseudomodular lattices","authors":"Manoj Dhake, Sachin Ballal, V. Kharat, R. Shewale","doi":"10.21136/mb.2024.0126-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0126-23","url":null,"abstract":". We characterize the pseudomodular lattices by means of a forbidden configu-ration.","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711769","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
Sakaguchi type functions defined by balancing polynomials 由平衡多项式定义的坂口型函数
IF 0.5
Mathematica Bohemica Pub Date : 2024-06-10 DOI: 10.21136/mb.2024.0173-23
Gunasekar Saravanan, Sudharsanan Baskaran, Balasubramaniam Vanithakumari, Serap Bulut
{"title":"Sakaguchi type functions defined by balancing polynomials","authors":"Gunasekar Saravanan, Sudharsanan Baskaran, Balasubramaniam Vanithakumari, Serap Bulut","doi":"10.21136/mb.2024.0173-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0173-23","url":null,"abstract":". The class of Sakaguchi type functions defined by balancing polynomials has been introduced as a novel subclass of bi-univalent functions. The bounds for the Fekete-Szegö inequality and the initial coefficients | a 2 | and | a 3 | have also been estimated.","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141365713","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
Finite logarithmic order meromorphic solutions of linear difference/differential-difference equations 线性差分/微分差分方程的有限对数阶非线性解
IF 0.5
Mathematica Bohemica Pub Date : 2024-06-05 DOI: 10.21136/mb.2024.0107-23
Abdelkader Dahmani, B. Belaïdi
{"title":"Finite logarithmic order meromorphic solutions of linear difference/differential-difference equations","authors":"Abdelkader Dahmani, B. Belaïdi","doi":"10.21136/mb.2024.0107-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0107-23","url":null,"abstract":". Firstly we study the growth of meromorphic solutions of linear difference equation of the form","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141381906","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
Structure of the unit group of the group algebras of non-metabelian groups of order 128 128 阶非美差群群集的单位群结构
IF 0.5
Mathematica Bohemica Pub Date : 2024-05-06 DOI: 10.21136/mb.2024.0017-23
Navamanirajan Abhilash, E. Nandakumar, R. Sharma, Gaurav Mittal
{"title":"Structure of the unit group of the group algebras of non-metabelian groups of order 128","authors":"Navamanirajan Abhilash, E. Nandakumar, R. Sharma, Gaurav Mittal","doi":"10.21136/mb.2024.0017-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0017-23","url":null,"abstract":". We characterize the unit group for the group algebras of non-metabelian groups of order 128 over the finite fields whose characteristic does not divide the order of the group. Up to isomorphism, there are 2328 groups of order 128 and only 14 of them are non-metabelian. We determine the Wedderburn decomposition of the group algebras of these non-metabelian groups and subsequently characterize their unit groups","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141008876","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
Totally contact umbilical screen-slant and screen-transversal lightlike submanifolds of indefinite Kenmotsu manifold 不确定建模流形的完全接触脐屏斜和屏横光样子流形
IF 0.5
Mathematica Bohemica Pub Date : 2024-04-17 DOI: 10.21136/mb.2024.0095-23
Payel Karmakar
{"title":"Totally contact umbilical screen-slant and screen-transversal lightlike submanifolds\u0000 \u0000of indefinite Kenmotsu manifold","authors":"Payel Karmakar","doi":"10.21136/mb.2024.0095-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0095-23","url":null,"abstract":". We study totally contact umbilical screen-slant lightlike submanifolds and totally contact umbilical screen-transversal lightlike submanifolds of an indefinite Kenmotsu manifold. We prove a characterization theorem of totally contact umbilical screen-slant lightlike submanifolds of an indefinite Kenmotsu manifold. We further prove some results on a totally contact umbilical radical screen-transversal lightlike submanifold of an indefinite Kenmotsu manifold, such as the necessary and sufficient conditions for the screen distribution S ( TM ) to be integrable and for the induced connection ∇ to be a metric connection.","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140691756","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
Relative co-annihilators in lattice equality algebras 晶格相等代数中的相对共析系数
IF 0.5
Mathematica Bohemica Pub Date : 2024-04-03 DOI: 10.21136/mb.2024.0120-23
S. Niazian, M. Aaly Kologani, R. Borzooei
{"title":"Relative co-annihilators in lattice equality algebras","authors":"S. Niazian, M. Aaly Kologani, R. Borzooei","doi":"10.21136/mb.2024.0120-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0120-23","url":null,"abstract":". We introduce the notion of relative co-annihilator in lattice equality algebras and investigate some important properties of it. Then, we obtain some interesting relations among ∨ -irreducible filters, positive implicative filters, prime filters and relative co-annihilators. Given a lattice equality algebra E and F a filter of E , we define the set of all F - involutive filters of E and show that by defining some operations on it, it makes a BL-algebra.","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140748453","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 hyper-order of analytic solutions of linear differential equations near a finite singular point 论有限奇异点附近线性微分方程解析解的超阶性
IF 0.5
Mathematica Bohemica Pub Date : 2024-03-21 DOI: 10.21136/mb.2024.0075-23
Meryem Chetti, K. Hamani
{"title":"On the hyper-order of analytic solutions of linear differential equations near a finite singular point","authors":"Meryem Chetti, K. Hamani","doi":"10.21136/mb.2024.0075-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0075-23","url":null,"abstract":". We study the hyper-order of analytic solutions of linear differential equations with analytic coefficients having the same order near a finite singular point. We improve previous results given by S. Cherief and S. Hamouda (2021). We also consider the nonho-mogeneous linear differential equations.","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140221734","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
Geometric approaches to establish the fundamentals of Lorentz spaces $mathbb{R}_2^3$ and $mathbb{R}_1^2$ 建立洛伦兹空间 $mathbb{R}_2^3$ 和 $mathbb{R}_1^2$ 基本原理的几何方法
IF 0.5
Mathematica Bohemica Pub Date : 2024-03-18 DOI: 10.21136/mb.2024.0111-23
Sevilay Çoruh Şenocak, Salim Yüce
{"title":"Geometric approaches to establish the fundamentals of Lorentz spaces $mathbb{R}_2^3$ and $mathbb{R}_1^2$","authors":"Sevilay Çoruh Şenocak, Salim Yüce","doi":"10.21136/mb.2024.0111-23","DOIUrl":"https://doi.org/10.21136/mb.2024.0111-23","url":null,"abstract":"","PeriodicalId":45392,"journal":{"name":"Mathematica Bohemica","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140231898","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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