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Tsukuba Journal of Mathematics最新文献

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$mathbb{C}$-Constructible enhanced ind-sheaves $mathbb{C}$-可构造的增强尾轴
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2020-07-01 DOI: 10.21099/tkbjm/20204401155
Yohei Ito
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引用次数: 0
Regularity results for the almost Hermitian curvature flow 几乎厄米曲率流的正则性结果
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2020-07-01 DOI: 10.21099/tkbjm/20204401063
Masaya Kawamura
{"title":"Regularity results for the almost Hermitian curvature flow","authors":"Masaya Kawamura","doi":"10.21099/tkbjm/20204401063","DOIUrl":"https://doi.org/10.21099/tkbjm/20204401063","url":null,"abstract":"","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48399522","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
Totally umbilical submanifolds in pseudo-Riemannian space forms 伪黎曼空间形式中的全脐子流形
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2020-05-13 DOI: 10.21099/tkbjm/20214502097
Yuichiro Sato
{"title":"Totally umbilical submanifolds in pseudo-Riemannian space forms","authors":"Yuichiro Sato","doi":"10.21099/tkbjm/20214502097","DOIUrl":"https://doi.org/10.21099/tkbjm/20214502097","url":null,"abstract":"A totally umbilical submanifold in pseudo-Riemannian manifolds is a fundamental notion, which is characterized by the fact that the second fundamental form to be proportional to the metric. And, it is also a generalization of a notion of a totally geodesic submanifold. In this paper, we classify congruent classes of full totally umbilical submanifolds in non-flat pseudo-Riemannian space forms, and consider its moduli spaces. As a consequence, we obtain that some moduli spaces of isometric immersions between space forms whose curvatures have the same constant are non-Hausdorff.","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46849534","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
Universal central extensions of linear groups over rings of non-commutative Laurent polynomials, associated $K_1$-groups and $K_2$-groups 非交换Laurent多项式环上线性群、相关$K_1$-群和$K_2$-群的泛中心扩张
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2020-05-13 DOI: 10.21099/tkbjm/20214501013
Ryusuke Sugawara
{"title":"Universal central extensions of linear groups over rings of non-commutative Laurent polynomials, associated $K_1$-groups and $K_2$-groups","authors":"Ryusuke Sugawara","doi":"10.21099/tkbjm/20214501013","DOIUrl":"https://doi.org/10.21099/tkbjm/20214501013","url":null,"abstract":"We prove that linear groups over rings of non-commutative Laurent polynomials $D_{tau}$ have Tits systems with the corresponding affine Weyl groups and have universal central extensions if $|Z(D)|geq 5$ and $|Z(D)|neq 9$. We also determine structures of $K_1$-groups and identify generators of $K_2$-groups.","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48290372","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
Generalized spherical mean value operators on Euclidean space 欧几里德空间上的广义球面均值算子
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2020-03-22 DOI: 10.21099/tkbjm/20214501037
Y. Okada, H. Yamane
{"title":"Generalized spherical mean value operators on Euclidean space","authors":"Y. Okada, H. Yamane","doi":"10.21099/tkbjm/20214501037","DOIUrl":"https://doi.org/10.21099/tkbjm/20214501037","url":null,"abstract":"We consider the Neumann version of the spherical mean value operator and its variants in the space of smooth functions, distributions and compactly supported ones. Surjectivity and range characterization issues are addressed from the viewpoint of convolution equations.","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42448234","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
Zeckendorf representations and mixing properties of sequences 序列的Zeckendorf表示和混合性质
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2019-12-03 DOI: 10.21099/TKBJM/20204402251
Neil Mañibo, E. Miro, D. Rust, Gwendolyn S. Tadeo
{"title":"Zeckendorf representations and mixing properties of\u0000 sequences","authors":"Neil Mañibo, E. Miro, D. Rust, Gwendolyn S. Tadeo","doi":"10.21099/TKBJM/20204402251","DOIUrl":"https://doi.org/10.21099/TKBJM/20204402251","url":null,"abstract":"We use generalised Zeckendorf representations of natural numbers to investigate mixing properties of symbolic dynamical systems. The systems we consider consist of bi-infinite sequences associated with so-called random substitutions. We focus on random substitutions associated with the Fibonacci, tribonacci and metallic mean numbers and take advantage of their respective numeration schemes.","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46374753","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
48 dimensional even unimodular nearly extremal lattices. 48维偶幺模近极值格。
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2019-12-01 DOI: 10.21099/tkbjm/1585706450
M. Ozeki
{"title":"48 dimensional even unimodular nearly extremal lattices.","authors":"M. Ozeki","doi":"10.21099/tkbjm/1585706450","DOIUrl":"https://doi.org/10.21099/tkbjm/1585706450","url":null,"abstract":"","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":"43 1","pages":"145-189"},"PeriodicalIF":0.7,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41755597","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
Time-space $L^2$-boundedness for the 2D Navier-Stokes equations and hyperbolic Navier-Stokes equations 二维Navier-Stokes方程和双曲Navier-Stokes方程的时空L^2有界性
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2019-12-01 DOI: 10.21099/tkbjm/1585706453
Takayuki Kobayashi, M. Misawa, Kenji Nakamura
{"title":"Time-space $L^2$-boundedness for the 2D Navier-Stokes equations and hyperbolic Navier-Stokes equations","authors":"Takayuki Kobayashi, M. Misawa, Kenji Nakamura","doi":"10.21099/tkbjm/1585706453","DOIUrl":"https://doi.org/10.21099/tkbjm/1585706453","url":null,"abstract":"","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":"43 1","pages":"223-239"},"PeriodicalIF":0.7,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43852651","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
Shimura and Shintani liftings of certain cusp forms of half-integral and integral weights 半积分权和积分权的某些尖端形式的Shimura和Shintani举
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2019-12-01 DOI: 10.21099/tkbjm/1585706451
M. Pandey, B. Ramakrishnan, Anup Kumar Singh
{"title":"Shimura and Shintani liftings of certain cusp forms of half-integral and integral weights","authors":"M. Pandey, B. Ramakrishnan, Anup Kumar Singh","doi":"10.21099/tkbjm/1585706451","DOIUrl":"https://doi.org/10.21099/tkbjm/1585706451","url":null,"abstract":"","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":"43 1","pages":"191-210"},"PeriodicalIF":0.7,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47228511","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
Paraholomorphic cohomology groups of hyperbolic adjoint orbits 双曲伴随轨道的拟自纯上同群
IF 0.7
Tsukuba Journal of Mathematics Pub Date : 2019-12-01 DOI: 10.21099/tkbjm/1585706449
Nobutaka Boumuki, T. Noda
{"title":"Paraholomorphic cohomology groups of hyperbolic adjoint orbits","authors":"Nobutaka Boumuki, T. Noda","doi":"10.21099/tkbjm/1585706449","DOIUrl":"https://doi.org/10.21099/tkbjm/1585706449","url":null,"abstract":"","PeriodicalId":44321,"journal":{"name":"Tsukuba Journal of Mathematics","volume":"43 1","pages":"113-143"},"PeriodicalIF":0.7,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45945539","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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