发布求助
文献互助 智能选刊 最新文献

Tamkang Journal of Mathematics最新文献

筛选
英文 中文
r-Stablity Index of r-Maximal Closed Hypersurfaces in de Sitter Spaces de Sitter空间中r-极大闭超曲面的r-稳定性指标
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-10-02 DOI: 10.5556/j.tkjm.53.2022.3639
B. Esmaeili, G. Haghighatdoost, F. Pashaie
{"title":"r-Stablity Index of r-Maximal Closed Hypersurfaces in de Sitter Spaces","authors":"B. Esmaeili, G. Haghighatdoost, F. Pashaie","doi":"10.5556/j.tkjm.53.2022.3639","DOIUrl":"https://doi.org/10.5556/j.tkjm.53.2022.3639","url":null,"abstract":"It is well-known that some of minimal (or maximal) hypersurfaces are stable. However, there is growing recognition on unstable hypersurfaces by introducing the concept of index of stability for minimal ones. For instance, the index of stability for minimal hypersurefces in Euclidean n-sphere has been defined by J. Simons  and followed by many people. Also, Barros and Sousa have studied a high order extention of index as the concept of r-index (i.e. index of r-stability) on r-minimal hypersurfaces of n-sphere. They gave low bonds for r-stability index of r-minimal hypersurfaces in Euclidean sphere. In this paper, we low bounds for the r-stability index of r-maximal closed spacelike hypersurfaces in the de Sitter space.","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"3 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89543897","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 REAL SURFACES IN $S^6$ s ^6中的完全实曲面
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-06-15 DOI: 10.5556/J.TKJM.23.1992.4522
Sharief Deshmukh
{"title":"TOTALLY REAL SURFACES IN $S^6$","authors":"Sharief Deshmukh","doi":"10.5556/J.TKJM.23.1992.4522","DOIUrl":"https://doi.org/10.5556/J.TKJM.23.1992.4522","url":null,"abstract":"\u0000 \u0000 \u0000The normal bundle $bar nu$ of a totally real surface $M$ in $S^6$ splits as $barnu= JTMoplus barmu$ where $TM$ is the tangent bundle of $M$ and  $barmu$ is sub­bundle of $barnu$ which is invariant under the almost complex structure $J$. We study the totally real surfaces M of constant Gaussian curvature K for which the second fundamental form $h(x, y) in JTM$, and we show that $K = 1$ (that is, $M$ is totally geodesic). \u0000 \u0000 \u0000","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"117 1 1","pages":"11-14"},"PeriodicalIF":0.6,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83724976","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
JACOBI'S TWO-SQUARE AND FOUR-SQUARE THEOREMS VIA ROGER'S IDENTITY 雅可比二平方定理和四平方定理通过罗杰的恒等式
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-06-06 DOI: 10.5556/J.TKJM.25.1994.4423
C. Adiga
{"title":"JACOBI'S TWO-SQUARE AND FOUR-SQUARE THEOREMS VIA ROGER'S IDENTITY","authors":"C. Adiga","doi":"10.5556/J.TKJM.25.1994.4423","DOIUrl":"https://doi.org/10.5556/J.TKJM.25.1994.4423","url":null,"abstract":"We obtain Jacobi's two-square and four-square theorems as an application of an identity of L.J. Rogers.","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"110 1","pages":"37-40"},"PeriodicalIF":0.6,"publicationDate":"2021-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74189260","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 BOREL DIRECTION CONCERNING SMALL FUNCTIONS 关于小函数的线性方向
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-05-25 DOI: 10.5556/J.TKJM.29.1998.4289
T. Chern
{"title":"ON BOREL DIRECTION CONCERNING SMALL FUNCTIONS","authors":"T. Chern","doi":"10.5556/J.TKJM.29.1998.4289","DOIUrl":"https://doi.org/10.5556/J.TKJM.29.1998.4289","url":null,"abstract":"Let J be a function meromorphic in the finite complex plane C. We donate by T(r, J)(To(r, !)) the Nevanlinna(Ahlfors-Shmizu) characteristic function of J. A mero­ morphic function a(z) (including the case f(z) == c where c in Cu {oo}) is called small with respect to f if T(r, a(z)) = o(T(r, J)) as r -, +oo. Ve let n(兀 <p, a, J = a(z)) be the number of roots (multiple roots being counted with their multiplicities) of the equation j(z) = a(z) for z in the angular domain D(r,cp,a) = {z: largz 列< c..t, lzl < r} where 0 :::; cp < 21r, a > 0. This paper deals with the existence of the Borel directions concerning small functions for mermorphic functions of finite positive order. Using Tsuji's method, we shall mainly prove Theorem 1 stated in the abstract. Theorem~extends a result of Chuang [2, p.127, Corollary 5.3], there a(z} are restricte<l over all extended complex numbm·s. Chuang's method rs different from ours and is區ed on the existence of a sequence of filling disk with their roots in the works of Milloux [3] and Valiron [7].","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"169 1","pages":"13-16"},"PeriodicalIF":0.6,"publicationDate":"2021-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75671532","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
LOCAL AND UNIFORM NEAR SMOOTHNESS OF SOME BANACH SPACES 某些巴拿赫空间的局部一致近似光滑性
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-05-16 DOI: 10.5556/J.TKJM.28.1997.4247
L. Olszowy
{"title":"LOCAL AND UNIFORM NEAR SMOOTHNESS OF SOME BANACH SPACES","authors":"L. Olszowy","doi":"10.5556/J.TKJM.28.1997.4247","DOIUrl":"https://doi.org/10.5556/J.TKJM.28.1997.4247","url":null,"abstract":"\u0000 \u0000 \u0000In this paper we give an estimate of the modulus of near smoothness of the space $c_o(E_i)$. In the case of the space $c_o(l_{p_i})$ the exact formula for this modulus is derived. Moreover, we show that the properties of near uniform smoothness and local near uniform smoothness are hereditary with respect to the product space $c_o(E_i)$. \u0000 \u0000 \u0000 \u0000 \u0000  \u0000 \u0000 \u0000","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"227 1","pages":"253-263"},"PeriodicalIF":0.6,"publicationDate":"2021-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76879964","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
A GENERAL METHOD FOR C ONSTRUCTING REGULAR SUMMATION MATRIX 构造正则求和矩阵的一般方法
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-05-12 DOI: 10.5556/J.TKJM.30.1999.4210
Yin Dongsheng
{"title":"A GENERAL METHOD FOR C ONSTRUCTING REGULAR SUMMATION MATRIX","authors":"Yin Dongsheng","doi":"10.5556/J.TKJM.30.1999.4210","DOIUrl":"https://doi.org/10.5556/J.TKJM.30.1999.4210","url":null,"abstract":"","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"175 1","pages":"67-69"},"PeriodicalIF":0.6,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88830596","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
A New Fuzzy Information Inequalities and its Applications in Establishing Relation among Fuzzy $f$-Divergence Measures 一种新的模糊信息不等式及其在模糊f -散度测度关系建立中的应用
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-05-05 DOI: 10.5556/J.TKJM.53.2022.3411
Sapna Gahlot, R. Saraswat
{"title":"A New Fuzzy Information Inequalities and its Applications in Establishing Relation among Fuzzy $f$-Divergence Measures","authors":"Sapna Gahlot, R. Saraswat","doi":"10.5556/J.TKJM.53.2022.3411","DOIUrl":"https://doi.org/10.5556/J.TKJM.53.2022.3411","url":null,"abstract":"\u0000\u0000\u0000There are many fuzzy information and divergence measures exist in the literature of fuzzy Information Theory. Inequalities play important role for finding the relations. Here, we will introduce some new information inequalities on fuzzy measures and their applications in pattern recognition. Also established relations between new and well known fuzzy divergence measures with help of the fuzzy $f$-divergence measure and jensen’s inequality. \u0000\u0000\u0000","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"25 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82695365","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
GLOBAL ATTRACTIVITY IN A FOUR-TERM RECURRENCE RELATION 四项递归关系中的全局吸引性
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-05-01 DOI: 10.5556/J.TKJM.30.1999.4229
Longyan Li, S. Cheng
{"title":"GLOBAL ATTRACTIVITY IN A FOUR-TERM RECURRENCE RELATION","authors":"Longyan Li, S. Cheng","doi":"10.5556/J.TKJM.30.1999.4229","DOIUrl":"https://doi.org/10.5556/J.TKJM.30.1999.4229","url":null,"abstract":"where (Hl) f: (O,oo) -t Rand g: [O,oo) x [O,oo) -t Rare positive functions; and (H2) f is nondecreasing and g is nonincreasing in each of its independent variables. A positive fixed point x* that satisfies x = f(x)g(x, x) is also called a positive equi­ librium point of equation (1.1). Our objective of this note is to show that under mild conditions on the functions f and g, every real sequence in n tends to one of the positive equilibrium points of (1.1). Similar results have been obtained for a number of recureence relations, see e.g. Kocic and Ladas [1], Camouzis et al. [2], Li et al. [3], and Li [4]. Indeed, this note is motivated by a concern raised in Kocic and Ladas [1, p.46] related to the stability of recurrence relations.","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"1 1","pages":"223-229"},"PeriodicalIF":0.6,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76386478","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
Connes Amenability of $l^1$-Munn Algebras $l^1$-Munn代数的可调和性
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-04-16 DOI: 10.5556/J.TKJM.53.2022.3554
A. Ghaffari, S. Javadi, Ebrahim Tamimi
{"title":"Connes Amenability of $l^1$-Munn Algebras","authors":"A. Ghaffari, S. Javadi, Ebrahim Tamimi","doi":"10.5556/J.TKJM.53.2022.3554","DOIUrl":"https://doi.org/10.5556/J.TKJM.53.2022.3554","url":null,"abstract":"In this paper, we study Connes amenability of l-Munn algebras. We apply this results to semigroup algebras. We show that for a weakly cancellative semigroupS with finite idempotents, amenability and Connes amenability are equivalent.","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"11 11","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72475070","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
A Method for Solving the Variational Inequality Problem and Fixed Point Problems in Banach Spaces Banach空间中变分不等式问题和不动点问题的一种求解方法
IF 0.6
Tamkang Journal of Mathematics Pub Date : 2021-04-14 DOI: 10.5556/J.TKJM.53.2022.3307
W. Khuangsatung, A. Kangtunyakarn
{"title":"A Method for Solving the Variational Inequality Problem and Fixed Point Problems in Banach Spaces","authors":"W. Khuangsatung, A. Kangtunyakarn","doi":"10.5556/J.TKJM.53.2022.3307","DOIUrl":"https://doi.org/10.5556/J.TKJM.53.2022.3307","url":null,"abstract":"The purpose of this research is to modify Halpern iteration’s process for finding a common element of the set of solutions of a variational inequality problem and the set of fixed points of a strictly pseudo contractive mapping in q-uniformly smooth Banach space. We also introduce a new technique to prove a strong convergence theorem for a finite family of strictly pseudo contractive mappings in q-uniformly smooth Banach space. Moreover, we give a numerical result to illustrate the main theorem.","PeriodicalId":45776,"journal":{"name":"Tamkang Journal of Mathematics","volume":"16 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82494498","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