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CJM volume 75 issue 2 Cover and Front matter CJM第75卷第2期封面和封面问题
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2023-03-20 DOI: 10.4153/s0008414x23000135
Robert McCann, K. Bringmann, P. Bravi, J. Gandini, M. A. H. Cifre, Miriam Tárraga, Osvaldo Guzmán, Jonah Gaster, Brice Loustau
{"title":"CJM volume 75 issue 2 Cover and Front matter","authors":"Robert McCann, K. Bringmann, P. Bravi, J. Gandini, M. A. H. Cifre, Miriam Tárraga, Osvaldo Guzmán, Jonah Gaster, Brice Loustau","doi":"10.4153/s0008414x23000135","DOIUrl":"https://doi.org/10.4153/s0008414x23000135","url":null,"abstract":"","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79384140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
On the stability of ring relative equilibria in the -body problem on with Hodge potential 霍奇势下环相对平衡体问题的稳定性
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2023-03-03 DOI: 10.4153/s0008414x23000123
J. Andrade, S. Boatto, F. Crespo, D. Espejo
{"title":"On the stability of ring relative equilibria in the -body problem on with Hodge potential","authors":"J. Andrade, S. Boatto, F. Crespo, D. Espejo","doi":"10.4153/s0008414x23000123","DOIUrl":"https://doi.org/10.4153/s0008414x23000123","url":null,"abstract":"","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89701954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Sub-Bergman Hilbert spaces on the unit disk III 单位磁盘III上的subbergman Hilbert空间
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2023-02-03 DOI: 10.4153/s0008414x23000494
S. Luo, Kehe Zhu
{"title":"Sub-Bergman Hilbert spaces on the unit disk III","authors":"S. Luo, Kehe Zhu","doi":"10.4153/s0008414x23000494","DOIUrl":"https://doi.org/10.4153/s0008414x23000494","url":null,"abstract":"For a bounded analytic function $varphi$ on the unit disk $D$ with $|varphi|_inftyle1$ we consider the defect operators $D_varphi$ and $D_{overlinevarphi}$ of the Toeplitz operators $T_varphi$ and $T_{overlinevarphi}$, respectively, on the weighted Bergman space $A^2_alpha$. The ranges of $D_varphi$ and $D_{overlinevarphi}$, written as $H(varphi)$ and $H(overlinevarphi)$ and equipped with appropriate inner products, are called sub-Bergman spaces. We prove the following three results in the paper: for $-1<alphale0$ the space $H(varphi)$ has a complete Nevanlinna-Pick kernel if and only if $varphi$ is a M\"{o}bius map; for $alpha>-1$ we have $H(varphi)=H(overlinevarphi)=A^2_{alpha-1}$ if and only if the defect operators $D_varphi$ and $D_{overlinevarphi}$ are compact; and for $alpha>-1$ we have $D^2_varphi(A^2_alpha)= D^2_{overlinevarphi}(A^2_alpha)=A^2_{alpha-2}$ if and only if $varphi$ is a finite Blaschke product. In some sense our restrictions on $alpha$ here are best possible.","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79995372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 17
CJM volume 75 issue 1 Cover and Front matter CJM第75卷第1期封面和正面问题
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2023-02-01 DOI: 10.4153/s0008414x23000020
{"title":"CJM volume 75 issue 1 Cover and Front matter","authors":"","doi":"10.4153/s0008414x23000020","DOIUrl":"https://doi.org/10.4153/s0008414x23000020","url":null,"abstract":"","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74782818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
CJM volume 75 issue 1 Cover and Back matter CJM第75卷第1期封面和封底
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2023-02-01 DOI: 10.4153/s0008414x23000032
{"title":"CJM volume 75 issue 1 Cover and Back matter","authors":"","doi":"10.4153/s0008414x23000032","DOIUrl":"https://doi.org/10.4153/s0008414x23000032","url":null,"abstract":"","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86682706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
On some multiplicative properties of large difference sets 关于大差分集的若干乘法性质
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2023-01-22 DOI: 10.4153/s0008414x23000500
I. Shkredov
{"title":"On some multiplicative properties of large difference sets","authors":"I. Shkredov","doi":"10.4153/s0008414x23000500","DOIUrl":"https://doi.org/10.4153/s0008414x23000500","url":null,"abstract":"In our paper we study multiplicative properties of difference sets $A-A$ for large sets $A subseteq mathbb{Z}/qmathbb{Z}$ in the case of composite $q$. We obtain a quantitative version of a result of A. Fish about the structure of the product sets $(A-A)(A-A)$. Also, we show that the multiplicative covering number of any difference set is always small.","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72890357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Some asymptotic formulae for torsion in homotopy groups 同伦群中挠性的一些渐近公式
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2023-01-06 DOI: 10.4153/s0008414x2300041x
Guy Boyde, R. Huang
{"title":"Some asymptotic formulae for torsion in homotopy groups","authors":"Guy Boyde, R. Huang","doi":"10.4153/s0008414x2300041x","DOIUrl":"https://doi.org/10.4153/s0008414x2300041x","url":null,"abstract":"Inspired by a remarkable work of F'{e}lix, Halperin and Thomas on the asymptotic estimation of the ranks of rational homotopy groups, and more recent works of Wu and the authors on local hyperbolicity, we prove two asymptotic formulae for torsion rank of homotopy groups, one using ordinary homology and one using $K$-theory. We use these to obtain explicit quantitative asymptotic lower bounds on the torsion rank of the homotopy groups for many interesting spaces after suspension, including Moore spaces, Eilenberg-MacLane spaces, complex projective spaces, complex Grassmannians, Milnor hypersurfaces and unitary groups.","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85640439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
CJM volume 74 issue 6 Cover and Back matter CJM第74卷第6期封面和封底
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2022-12-01 DOI: 10.4153/s0008414x22000475
{"title":"CJM volume 74 issue 6 Cover and Back matter","authors":"","doi":"10.4153/s0008414x22000475","DOIUrl":"https://doi.org/10.4153/s0008414x22000475","url":null,"abstract":"","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81388857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
CJM volume 74 issue 6 Cover and Front matter CJM第74卷第6期封面和封面问题
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2022-12-01 DOI: 10.4153/s0008414x22000463
Robert McCann, K. Bringmann, H. Maldeghem, K. Ebrahimi-Fard, F. Patras, N. Tapia
{"title":"CJM volume 74 issue 6 Cover and Front matter","authors":"Robert McCann, K. Bringmann, H. Maldeghem, K. Ebrahimi-Fard, F. Patras, N. Tapia","doi":"10.4153/s0008414x22000463","DOIUrl":"https://doi.org/10.4153/s0008414x22000463","url":null,"abstract":"","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90132974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Generating function of multiple polylog of Hurwitz type Hurwitz型多重多项式的生成函数
IF 0.7 3区 数学
Canadian Journal of Mathematics-Journal Canadien De Mathematiques Pub Date : 2022-11-21 DOI: 10.4153/s0008414x22000621
K. Ihara, Y. Kusunoki, Yayoi Nakamura, Hitomi Saeki
{"title":"Generating function of multiple polylog of Hurwitz type","authors":"K. Ihara, Y. Kusunoki, Yayoi Nakamura, Hitomi Saeki","doi":"10.4153/s0008414x22000621","DOIUrl":"https://doi.org/10.4153/s0008414x22000621","url":null,"abstract":"","PeriodicalId":55284,"journal":{"name":"Canadian Journal of Mathematics-Journal Canadien De Mathematiques","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72528380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
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