In this paper, several necessary and su‰cient conditions are presented for a module M to be cohomologically complete intersection module with respect to I , i.e. H i I ðMÞ 1⁄4 0 for all i0 c 1⁄4 gradeðI ;MÞ. This notion is a generalization of cohomologically complete intersection ideals.
在本文中，给出了模M是关于I的上同调完全交模的几个必要和充分条件，即对于所有i0 c 1⁄4等级的H I I？MÞ1⁄40；MÞ。这个概念是上同调完全交集理想的推广。
{"title":"On cohomologically complete intersection\u0000 modules","authors":"Waqas Mahmood","doi":"10.32917/H2019073","DOIUrl":"https://doi.org/10.32917/H2019073","url":null,"abstract":"In this paper, several necessary and su‰cient conditions are presented for a module M to be cohomologically complete intersection module with respect to I , i.e. H i I ðMÞ 1⁄4 0 for all i0 c 1⁄4 gradeðI ;MÞ. This notion is a generalization of cohomologically complete intersection ideals.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41452989","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}
Our aim in this paper is to deal with the boundedness of the HardyLittlewood maximal operator and the Hardy operator on non-homogeneous central Herz-Morrey-Musielak-Orlicz spaces and to establish a generalization of Sobolev’s inequalities for Riesz potentials of functions in such spaces.
{"title":"Boundedness of maximal operator, Hardy operator and\u0000 Sobolev’s inequalities on non-homogeneous central Herz-Morrey-Musielak-Orlicz\u0000 spaces","authors":"F. Maeda, Y. Mizuta, T. Ohno, T. Shimomura","doi":"10.32917/H2019141","DOIUrl":"https://doi.org/10.32917/H2019141","url":null,"abstract":"Our aim in this paper is to deal with the boundedness of the HardyLittlewood maximal operator and the Hardy operator on non-homogeneous central Herz-Morrey-Musielak-Orlicz spaces and to establish a generalization of Sobolev’s inequalities for Riesz potentials of functions in such spaces.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45794570","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}
We show that the ring of modular forms with characters for the even unimodular lattice of signature (2,18) is obtained from the invariant ring of $mathrm{Sym}(mathrm{Sym}^8(V) oplus mathrm{Sym}^{12}(V))$ with respect to the action of $mathrm{SL}(V)$ by adding a Borcherds product of weight 132 with one relation of weight 264, where $V$ is a 2-dimensional $mathbb{C}$-vector space. The proof is based on the study of the moduli space of elliptic K3 surfaces with a section.
{"title":"The ring of modular forms for the even unimodular lattice of signature (2,18)","authors":"Atsuhira Nagano, K. Ueda","doi":"10.32917/h2021012","DOIUrl":"https://doi.org/10.32917/h2021012","url":null,"abstract":"We show that the ring of modular forms with characters for the even unimodular lattice of signature (2,18) is obtained from the invariant ring of $mathrm{Sym}(mathrm{Sym}^8(V) oplus mathrm{Sym}^{12}(V))$ with respect to the action of $mathrm{SL}(V)$ by adding a Borcherds product of weight 132 with one relation of weight 264, where $V$ is a 2-dimensional $mathbb{C}$-vector space. The proof is based on the study of the moduli space of elliptic K3 surfaces with a section.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44370190","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}
A bstract . This paper is concerned with computable error bounds for asymptotic approximations of the expected probabilities of misclassification (EPMC) of the quadratic discriminant function Q . A location and scale mixture expression for Q is given as a special case of a general discriminant function including the linear and quadratic discriminant functions. Using the result, we provide computable error bounds for asymptotic approximations of the EPMC of Q when both the sample size and the dimensionality are large. The bounds are numerically explored. Similar results are given for a quadratic discriminant function Q 0 when the covariance matrix is known.
{"title":"Computable error bounds for asymptotic approximations of the quadratic discriminant function","authors":"Y. Fujikoshi","doi":"10.32917/hmj/1607396491","DOIUrl":"https://doi.org/10.32917/hmj/1607396491","url":null,"abstract":"A bstract . This paper is concerned with computable error bounds for asymptotic approximations of the expected probabilities of misclassification (EPMC) of the quadratic discriminant function Q . A location and scale mixture expression for Q is given as a special case of a general discriminant function including the linear and quadratic discriminant functions. Using the result, we provide computable error bounds for asymptotic approximations of the EPMC of Q when both the sample size and the dimensionality are large. The bounds are numerically explored. Similar results are given for a quadratic discriminant function Q 0 when the covariance matrix is known.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49585899","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}
The $m$-trace of a knot is the $4$-manifold obtained from $mathbf{B}^4$ by attaching a $2$-handle along the knot with $m$-framing. In 2015, Abe, Jong, Luecke and Osoinach introduced a technique to construct infinitely many knots with the same $m$-trace, which is called the operation $(ast m)$. In this paper, we prove that their technique can be explained in terms of Gompf and Miyazaki's dualizable pattern. In addition, we show that the family of knots admitting the same $4$-surgery given by Teragaito can be explained by the operation $(ast m)$.
{"title":"Notes on constructions of knots with the same trace","authors":"Keiji Tagami","doi":"10.32917/h2021005","DOIUrl":"https://doi.org/10.32917/h2021005","url":null,"abstract":"The $m$-trace of a knot is the $4$-manifold obtained from $mathbf{B}^4$ by attaching a $2$-handle along the knot with $m$-framing. In 2015, Abe, Jong, Luecke and Osoinach introduced a technique to construct infinitely many knots with the same $m$-trace, which is called the operation $(ast m)$. In this paper, we prove that their technique can be explained in terms of Gompf and Miyazaki's dualizable pattern. In addition, we show that the family of knots admitting the same $4$-surgery given by Teragaito can be explained by the operation $(ast m)$.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44538739","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}
In this paper, we give a formula for the number of rational points on the Dwork hypersurfaces of degree six over finite fields by using Greene's finite-field hypergeometric function, which is a generalization of Goodson's formula for the Dwork hypersurfaces of degree four [1, Theorem 1.1]. Our formula is also a higher-dimensional and a finite field analogue of MatsumotoTerasoma-Yamazaki's formula. Furthermore, we also explain the relation between our formula and Miyatani's formula.
{"title":"Dwork hypersurfaces of degree six and Greene’s hypergeometric function","authors":"Satoshi Kumabe","doi":"10.32917/h2020097","DOIUrl":"https://doi.org/10.32917/h2020097","url":null,"abstract":"In this paper, we give a formula for the number of rational points on the Dwork hypersurfaces of degree six over finite fields by using Greene's finite-field hypergeometric function, which is a generalization of Goodson's formula for the Dwork hypersurfaces of degree four [1, Theorem 1.1]. Our formula is also a higher-dimensional and a finite field analogue of MatsumotoTerasoma-Yamazaki's formula. Furthermore, we also explain the relation between our formula and Miyatani's formula.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41248741","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}
A criterion for the existence of a plane model with two non-smooth Galois points for algebraic curves is presented, which is a generalization of Fukasawa's criterion for two smooth Galois points. Owing to this generalized criterion, multiplicities and order sequences at Galois points can be described in detail.
{"title":"A criterion for the existence of a plane model with two inner Galois points for algebraic curves","authors":"Kazuki Higashine","doi":"10.32917/H2020094","DOIUrl":"https://doi.org/10.32917/H2020094","url":null,"abstract":"A criterion for the existence of a plane model with two non-smooth Galois points for algebraic curves is presented, which is a generalization of Fukasawa's criterion for two smooth Galois points. Owing to this generalized criterion, multiplicities and order sequences at Galois points can be described in detail.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41809900","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}
{"title":"Consistent variable selection criteria in multivariate linear regression even when dimension exceeds sample size","authors":"R. Oda","doi":"10.32917/hmj/1607396493","DOIUrl":"https://doi.org/10.32917/hmj/1607396493","url":null,"abstract":"","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44008384","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}
Jong-Shenq Guo, N. Kavallaris, Chi-Jen Wang, C. Yu
We consider a parabolic problem with Robin boundary condition which arises when the edge of a micro-electro-mechanical-system (MEMS) device is connected with a flexible nonideal support. Then via a rigorous analysis we investigate the structure of the solution set of the corresponding steady-state problem. We show that a critical value (the pull-in voltage) exists so that the system has exactly two stationary solutions when the applied voltage is lower than this critical value, one stationary solution for applying this critical voltage, and no stationary solution above the critical voltage.
{"title":"Bifurcation diagram of a Robin boundary value problem arising in MEMS","authors":"Jong-Shenq Guo, N. Kavallaris, Chi-Jen Wang, C. Yu","doi":"10.32917/h2021029","DOIUrl":"https://doi.org/10.32917/h2021029","url":null,"abstract":"We consider a parabolic problem with Robin boundary condition which arises when the edge of a micro-electro-mechanical-system (MEMS) device is connected with a flexible nonideal support. Then via a rigorous analysis we investigate the structure of the solution set of the corresponding steady-state problem. We show that a critical value (the pull-in voltage) exists so that the system has exactly two stationary solutions when the applied voltage is lower than this critical value, one stationary solution for applying this critical voltage, and no stationary solution above the critical voltage.","PeriodicalId":55054,"journal":{"name":"Hiroshima Mathematical Journal","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41760528","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}
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