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On $Pi$-property of some maximal subgroups of Sylow subgroups of finite groups 关于有限群Sylow子群的一些极大子群的$Pi$性质
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-09-08 DOI: 10.21136/cmj.2023.0089-23
Z. Qiu, Jianjun Liu, Guiyun Chen
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引用次数: 0
A class of quantum doubles of pointed Hopf algebras of rank one 一类秩为1的尖Hopf代数的量子对偶
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-09-06 DOI: 10.21136/cmj.2023.0015-23
Hua Sun, Yueming Li
{"title":"A class of quantum doubles of pointed Hopf algebras of rank one","authors":"Hua Sun, Yueming Li","doi":"10.21136/cmj.2023.0015-23","DOIUrl":"https://doi.org/10.21136/cmj.2023.0015-23","url":null,"abstract":"","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47359274","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}
引用次数: 0
On unbounded solutions for differential equations with mean curvature operator 关于带有平均曲率算子的微分方程的无界解
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-09-06 DOI: 10.21136/cmj.2023.0111-23
Z. Došlá, M. Marini, S. Matucci
{"title":"On unbounded solutions for differential equations with mean curvature operator","authors":"Z. Došlá, M. Marini, S. Matucci","doi":"10.21136/cmj.2023.0111-23","DOIUrl":"https://doi.org/10.21136/cmj.2023.0111-23","url":null,"abstract":". We present necessary and sufficient conditions for the existence of unbounded increasing solutions to ordinary differential equations with mean curvature operator. The results illustrate the asymptotic proximity of such solutions with those of an auxiliary linear equation on the threshold of oscillation. A new oscillation criterion for equations with mean curvature operator, extending Leighton criterion for linear Sturm-Liouville equation, is also derived.","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49121049","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}
引用次数: 0
Exact multiplicity and bifurcation curves of positive solutions of generalized logistic problems 广义逻辑问题正解的精确多重性和分岔曲线
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-09-05 DOI: 10.21136/cmj.2023.0359-22
Shao-Yuan Huang, Ping-Han Hsieh
{"title":"Exact multiplicity and bifurcation curves of positive solutions of generalized logistic problems","authors":"Shao-Yuan Huang, Ping-Han Hsieh","doi":"10.21136/cmj.2023.0359-22","DOIUrl":"https://doi.org/10.21136/cmj.2023.0359-22","url":null,"abstract":"","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41728931","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}
引用次数: 0
Time regularity of generalized Navier-Stokes equation with $p(x,t)$-power law p(x,t) -幂律下广义Navier-Stokes方程的时间正则性
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-08-08 DOI: 10.21136/cmj.2023.0033-22
Cholmin Sin
{"title":"Time regularity of generalized Navier-Stokes equation with $p(x,t)$-power law","authors":"Cholmin Sin","doi":"10.21136/cmj.2023.0033-22","DOIUrl":"https://doi.org/10.21136/cmj.2023.0033-22","url":null,"abstract":"","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45544861","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}
引用次数: 1
Function algebras of Besov and Triebel-Lizorkin-type Besov和Triebel-Lizorkin型函数代数
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-07-25 DOI: 10.21136/cmj.2023.0585-22
Fares Bensaid, M. Moussai
{"title":"Function algebras of Besov and Triebel-Lizorkin-type","authors":"Fares Bensaid, M. Moussai","doi":"10.21136/cmj.2023.0585-22","DOIUrl":"https://doi.org/10.21136/cmj.2023.0585-22","url":null,"abstract":"","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44165632","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}
引用次数: 0
On the zeros of a quaternionic polynomial: An extension of the Eneström-Kakeya theorem 四元数多项式的零点:Eneström-Kakeya定理的推广
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-06-22 DOI: 10.21136/CMJ.2023.0097-22
A. Mir
{"title":"On the zeros of a quaternionic polynomial: An extension of the Eneström-Kakeya theorem","authors":"A. Mir","doi":"10.21136/CMJ.2023.0097-22","DOIUrl":"https://doi.org/10.21136/CMJ.2023.0097-22","url":null,"abstract":"We present some results on the location of zeros of regular polynomials of a quaternionic variable. We derive new bounds of Eneström-Kakeya type for the zeros of these polynomials by virtue of a maximum modulus theorem and the structure of the zero sets of a regular product established in the newly developed theory of regular functions and polynomials of a quaternionic variable. Our results extend some classical results from complex to the quaternionic setting as well.","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":"73 1","pages":"649 - 662"},"PeriodicalIF":0.5,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42045785","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}
引用次数: 0
Commutative rings whose certain modules decompose into direct sums of cyclic submodules 某些模分解为循环子模的直和的交换环
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-06-21 DOI: 10.21136/cmj.2023.0392-22
Farid Kourki, R. Tribak
{"title":"Commutative rings whose certain modules decompose into direct sums of cyclic submodules","authors":"Farid Kourki, R. Tribak","doi":"10.21136/cmj.2023.0392-22","DOIUrl":"https://doi.org/10.21136/cmj.2023.0392-22","url":null,"abstract":"","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45035089","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}
引用次数: 0
Majority choosability of 1-planar digraph 平面有向图的大多数选择
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-06-21 DOI: 10.21136/CMJ.2023.0170-22
Weihao Xia, Jihui Wang, Jiansheng Cai
{"title":"Majority choosability of 1-planar digraph","authors":"Weihao Xia, Jihui Wang, Jiansheng Cai","doi":"10.21136/CMJ.2023.0170-22","DOIUrl":"https://doi.org/10.21136/CMJ.2023.0170-22","url":null,"abstract":"A majority coloring of a digraph D with k colors is an assignment π: V(D) → {1, 2, …, k} such that for every v ∈ V(D) we have π(w) = π(v) for at most half of all out-neighbors w ∈ N+(v). A digraph D is majority k-choosable if for any assignment of lists of colors of size k to the vertices, there is a majority coloring of D from these lists. We prove that if U(D) is a 1-planar graph without a 4-cycle, then D is majority 3-choosable. And we also prove that every NIC-planar digraph is majority 3-choosable.","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":"73 1","pages":"663 - 673"},"PeriodicalIF":0.5,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46311847","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}
引用次数: 0
Equations for the set of overrings of normal rings and related ring extensions 正规环和相关环扩张的覆盖集的方程
IF 0.5 4区 数学
Czechoslovak Mathematical Journal Pub Date : 2023-06-20 DOI: 10.21136/CMJ.2023.0358-22
M. Ben Nasr, Ali Jaballah
{"title":"Equations for the set of overrings of normal rings and related ring extensions","authors":"M. Ben Nasr, Ali Jaballah","doi":"10.21136/CMJ.2023.0358-22","DOIUrl":"https://doi.org/10.21136/CMJ.2023.0358-22","url":null,"abstract":"We establish several finiteness characterizations and equations for the cardinality and the length of the set of overrings of rings with nontrivial zero divisors and integrally closed in their total ring of fractions. Similar properties are also obtained for related extensions of commutative rings that are not necessarily integral domains. Numerical characterizations are obtained for rings with some finiteness conditions afterwards.","PeriodicalId":50596,"journal":{"name":"Czechoslovak Mathematical Journal","volume":"73 1","pages":"921 - 935"},"PeriodicalIF":0.5,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45689782","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}
引用次数: 0
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