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Pacific Journal of Mathematics最新文献

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Combinatorial properties of nonarchimedean convex sets 非阿基米德凸集的组合性质
3区 数学
Pacific Journal of Mathematics Pub Date : 2023-05-29 DOI: 10.2140/pjm.2023.323.1
Chernikov, Artem, Mennen, Alex
{"title":"Combinatorial properties of nonarchimedean convex sets","authors":"Chernikov, Artem, Mennen, Alex","doi":"10.2140/pjm.2023.323.1","DOIUrl":"https://doi.org/10.2140/pjm.2023.323.1","url":null,"abstract":"We study combinatorial properties of convex sets over arbitrary valued fields. We demonstrate analogs of some classical results for convex sets over the reals (e.g. the fractional Helly theorem and B'ar'any's theorem on points in many simplices), along with some additional properties not satisfied by convex sets over the reals, including finite breadth and VC-dimension. These results are deduced from a simple combinatorial description of modules over the valuation ring in a spherically complete valued field.","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135741783","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
The classification of nondegenerate uniconnected cycle sets 非退化单连通循环集的分类
3区 数学
Pacific Journal of Mathematics Pub Date : 2023-05-29 DOI: 10.2140/pjm.2023.323.205
Wolfgang Rump
{"title":"The classification of nondegenerate uniconnected cycle sets","authors":"Wolfgang Rump","doi":"10.2140/pjm.2023.323.205","DOIUrl":"https://doi.org/10.2140/pjm.2023.323.205","url":null,"abstract":"","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135792508","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 homology theories of cubical digraphs 关于三次有向图的同调理论
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2023-05-03 DOI: 10.2140/pjm.2023.322.39
A. Grigor’yan, Y. Muranov
{"title":"On homology theories of cubical digraphs","authors":"A. Grigor’yan, Y. Muranov","doi":"10.2140/pjm.2023.322.39","DOIUrl":"https://doi.org/10.2140/pjm.2023.322.39","url":null,"abstract":". We prove the equivalence of the singular cubical homology and the path homology on the category of cubical digraphs. As a corollary we obtain a new relation between the singular cubical homology of digraphs and simplicial homology.","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41955520","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
Spin Kostka polynomials and vertex operators 自旋Kostka多项式和顶点算子
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2023-03-19 DOI: 10.2140/pjm.2023.325.127
N. Jing, Ning Liu
{"title":"Spin Kostka polynomials and vertex operators","authors":"N. Jing, Ning Liu","doi":"10.2140/pjm.2023.325.127","DOIUrl":"https://doi.org/10.2140/pjm.2023.325.127","url":null,"abstract":"An algebraic iterative formula for the spin Kostka-Foulkes polynomial $K^-_{ximu}(t)$ is given using vertex operator realizations of Hall-Littlewood symmetric functions and Schur's Q-functions. Based on the operational formula, more favorable properties are obtained parallel to the Kostka polynomial. In particular, we obtain some formulae for the number of (unshifted) marked tableaux. As an application, we confirmed a conjecture of Aokage on the expansion of the Schur $P$-function in terms of Schur functions. Tables of $K^-_{ximu}(t)$ for $|xi|leq6$ are listed.","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41386687","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: 1
A lift of West’s stack-sorting map to partitiondiagrams 将West的堆栈排序图提升为分区图
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2023-01-03 DOI: 10.2140/pjm.2023.324.227
John M. Campbell
{"title":"A lift of West’s stack-sorting map to partition\u0000diagrams","authors":"John M. Campbell","doi":"10.2140/pjm.2023.324.227","DOIUrl":"https://doi.org/10.2140/pjm.2023.324.227","url":null,"abstract":"We introduce a lifting of West's stack-sorting map $s$ to partition diagrams, which are combinatorial objects indexing bases of partition algebras. Our lifting $mathscr{S}$ of $s$ is such that $mathscr{S}$ behaves in the same way as $s$ when restricted to diagram basis elements in the order-$n$ symmetric group algebra as a diagram subalgebra of the partition algebra $mathscr{P}_{n}^{xi}$. We then introduce a lifting of the notion of $1$-stack-sortability, using our lifting of $s$. By direct analogy with Knuth's famous result that a permutation is $1$-stack-sortable if and only if it avoids the pattern $231$, we prove a related pattern-avoidance property for partition diagrams, as opposed to permutations, according to what we refer to as stretch-stack-sortability.","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44609646","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: 1
Fold maps on small dimensional manifolds with prescribed singular set 具有规定奇异集的小维流形上的折叠映射
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2022-12-31 DOI: 10.2140/pjm.2022.321.309
B. Kalmár
{"title":"Fold maps on small dimensional manifolds with prescribed singular set","authors":"B. Kalmár","doi":"10.2140/pjm.2022.321.309","DOIUrl":"https://doi.org/10.2140/pjm.2022.321.309","url":null,"abstract":"","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49392468","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
Multivariate correlation inequalities forP-partitions p -分区的多元相关不等式
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2022-12-22 DOI: 10.2140/pjm.2023.323.223
Swee Hong Chan, I. Pak
{"title":"Multivariate correlation inequalities for\u0000P-partitions","authors":"Swee Hong Chan, I. Pak","doi":"10.2140/pjm.2023.323.223","DOIUrl":"https://doi.org/10.2140/pjm.2023.323.223","url":null,"abstract":"Motivated by the Lam--Pylyavskyy inequalities for Schur functions, we give a far reaching multivariate generalization of Fishburn's correlation inequality for the number of linear extensions of posets. We then give a multivariate generalization of the Daykin--Daykin--Paterson inequality proving log-concavity of the order polynomial of a poset. We also prove a multivariate $P$-partition version of the cross-product inequality by Brightwell--Felsner--Trotter. The proofs are based on a multivariate generalization of the Ahlswede--Daykin inequality.","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43228902","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: 3
Irredundant bases for finite groups of Lie type 李型有限群的无冗余基
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2022-12-15 DOI: 10.2140/pjm.2023.322.281
Nick Gill, M. Liebeck
{"title":"Irredundant bases for finite groups of Lie type","authors":"Nick Gill, M. Liebeck","doi":"10.2140/pjm.2023.322.281","DOIUrl":"https://doi.org/10.2140/pjm.2023.322.281","url":null,"abstract":"We prove that the maximum length of an irredundant base for a primitive action of a finite simple group of Lie type is bounded above by a function which is a polynomial in the rank of the group. We give examples to show that this type of upper bound is best possible.","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43223410","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
The structure of groups with all proper quotients virtually nilpotent 具有所有真商的群的结构实际上是幂零的
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2022-11-14 DOI: 10.2140/pjm.2023.325.147
B. Klopsch, M. Quick
{"title":"The structure of groups with all proper quotients virtually nilpotent","authors":"B. Klopsch, M. Quick","doi":"10.2140/pjm.2023.325.147","DOIUrl":"https://doi.org/10.2140/pjm.2023.325.147","url":null,"abstract":"Just infinite groups play a significant role in profinite group theory. For each $c geq 0$, we consider more generally JNN$_c$F profinite (or, in places, discrete) groups that are Fitting-free; these are the groups $G$ such that every proper quotient of $G$ is virtually class-$c$ nilpotent whereas $G$ itself is not, and additionally $G$ does not have any non-trivial abelian normal subgroup. When $c = 1$, we obtain the just non-(virtually abelian) groups without non-trivial abelian normal subgroups. Our first result is that a finitely generated profinite group is virtually classnbd$c$ nilpotent if and only if there are only finitely many subgroups arising as the lower central series terms $gamma_{c+1}(K)$ of open normal subgroups $K$ of $G$. Based on this we prove several structure theorems. For instance, we characterize the JNN$_c$F profinite groups in terms of subgroups of the above form $gamma_{c+1}(K)$. We also give a description of JNN$_c$F profinite groups as suitable inverse limits of virtually nilpotent profinite groups. Analogous results are established for the family of hereditarily JNN$_c$F groups and, for instance, we show that a Fitting-free JNN$_c$F profinite (or discrete) group is hereditarily JNN$_cF$ if and only if every maximal subgroup of finite index is JNN$_c$F. Finally, we give a construction of hereditarily JNN$_c$F groups, which uses as an input known families of hereditarily just infinite groups.","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41444593","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
The i-quantum groupTEXTBACKSLASHmathboldTEXTBACKSLASHUı(n) i-量子组textbackslashmathboldtextbackslashuyi (n)
IF 0.6 3区 数学
Pacific Journal of Mathematics Pub Date : 2022-10-16 DOI: 10.2140/pjm.2022.320.61
J. Du, Yadi Wu
{"title":"The i-quantum group\u0000TEXTBACKSLASHmathboldTEXTBACKSLASHUı(n)","authors":"J. Du, Yadi Wu","doi":"10.2140/pjm.2022.320.61","DOIUrl":"https://doi.org/10.2140/pjm.2022.320.61","url":null,"abstract":"","PeriodicalId":54651,"journal":{"name":"Pacific Journal of Mathematics","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2022-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45926473","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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