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Publications De L'institut Mathematique最新文献

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A note on W3-manifolds 关于w3流形的注释
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM1817017B
M. Banaru, G. Banaru
{"title":"A note on W3-manifolds","authors":"M. Banaru, G. Banaru","doi":"10.2298/PIM1817017B","DOIUrl":"https://doi.org/10.2298/PIM1817017B","url":null,"abstract":"","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"489 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127575381","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
On Sylow subgroups of Sn 关于Sn的Sylow亚群
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM0374001B
R. Bakić
{"title":"On Sylow subgroups of Sn","authors":"R. Bakić","doi":"10.2298/PIM0374001B","DOIUrl":"https://doi.org/10.2298/PIM0374001B","url":null,"abstract":"We give a new approach to description of p-Sylow subgroup normalizes in the groups Sn (symmetric group on n letters).","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130804509","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
ON THE SIGNLESS LAPLACIAN SPECTRAL RADIUS OF UNICYCLIC GRAPHS WITH FIXED MATCHING NUMBER 固定匹配数单环图的无符号拉普拉斯谱半径
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM140921001Z
Jing-Ming Zhang, Ting Huang, Ji-Ming Guo
{"title":"ON THE SIGNLESS LAPLACIAN SPECTRAL RADIUS OF UNICYCLIC GRAPHS WITH FIXED MATCHING NUMBER","authors":"Jing-Ming Zhang, Ting Huang, Ji-Ming Guo","doi":"10.2298/PIM140921001Z","DOIUrl":"https://doi.org/10.2298/PIM140921001Z","url":null,"abstract":"We determine the graph with the largest signless Laplacian spec- tral radius among all unicyclic graphs with fixed matching number. respectively. The largest eigenvalues of A(G) and Q(G) are called the spectral radius and the signless Laplacian spectral radius of G, denoted by �(G) and q(G), respectively. When G is connected, A(G) and Q(G) are nonegative irreducible matrix. By the Perron-Frobenius theory, �(G) is simple and has a unique positive unit eigenvector, so does q(G). We refer to such the eigenvector corresponding to q(G) as the Perron vector of G. Two distinct edges in a graph G are independent if they are not adjacent in G. A set of pairwise independent edges of G is called a matching in G. A matching of","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131134587","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: 3
A note on the Fekete-Szegö problem for close-to-convex functions with respect to convex functions 关于关于凸函数的近似凸函数Fekete-Szegö问题的注释
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM1715143K
B. Kowalczyk, A. Lecko, H. Srivastava
{"title":"A note on the Fekete-Szegö problem for close-to-convex functions with respect to convex functions","authors":"B. Kowalczyk, A. Lecko, H. Srivastava","doi":"10.2298/PIM1715143K","DOIUrl":"https://doi.org/10.2298/PIM1715143K","url":null,"abstract":". We discuss the sharpness of the bound of the Fekete–Szegö functional for close-to-convex functions with respect to convex functions. We also briefly consider other related developments involving the Fekete–Szegö functional | a 3 − λa 22 | (0 6 λ 6 1) as well as the corresponding Hankel determinant for the Taylor–Maclaurin coefficients { a n } n ∈ Nr { 1 } of normalized univalent functions in the open unit disk D , N being the set of positive integers.","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131171202","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: 24
Extendable shelling, simplicial and toric h-vector of some polytopes 某些多面体的可拓壳壳、简复h向量
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM0795085J
D. Jojic
{"title":"Extendable shelling, simplicial and toric h-vector of some polytopes","authors":"D. Jojic","doi":"10.2298/PIM0795085J","DOIUrl":"https://doi.org/10.2298/PIM0795085J","url":null,"abstract":"We show that the stellar subdivisions of a simplex are extendably shellable. These polytopes appear as the facets of the dual of a hypersim- plex. Using this fact, we calculate the simplicial and toric h-vector of the dual of a hypersimplex. Finally, we calculate the contribution of each shelling component to the toric h-vector.","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132897472","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: 6
BLOW UP RESULTS FOR FRACTIONAL DIFFERENTIAL EQUATIONS AND SYSTEMS 分数阶微分方程和系统的爆破结果
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM1307173H
A. Hakem, M. Berbiche
{"title":"BLOW UP RESULTS FOR FRACTIONAL DIFFERENTIAL EQUATIONS AND SYSTEMS","authors":"A. Hakem, M. Berbiche","doi":"10.2298/PIM1307173H","DOIUrl":"https://doi.org/10.2298/PIM1307173H","url":null,"abstract":"The aim of this research paper is to establish sufficient conditions for the nonexistence of global solutions for the following nonlinear fractional differential equation D �|t u + (−�) �/2 |u| m 1 u + a(x) � ∇|u| q 1 u = h(x,t)|u| p , (t,x) ∈ Q, u(0,x) = u0(x), x ∈ R N where (−�) �/2 , 0 < � < 2 is the fractional power of −�, and D �|t , (0 < � < 1) denotes the time-derivative of arbitrary � ∈ (0;1) in the sense of Caputo. The results are shown by the use of test function theory and extended to systems of the same type.","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132712586","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: 6
Magnetic vector fields: New examples 磁场矢量场:新例子
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM1817091I
J. Inoguchi, M. Munteanu
{"title":"Magnetic vector fields: New examples","authors":"J. Inoguchi, M. Munteanu","doi":"10.2298/PIM1817091I","DOIUrl":"https://doi.org/10.2298/PIM1817091I","url":null,"abstract":"In a previous paper, we introduced the notion of magnetic vector fields. More \u0000 precisely, we consider a vector field ξ as a map from a Riemannian manifold \u0000 into its tangent bundle endowed with the usual almost Kahlerian structure \u0000 and we find necessary and sufficient conditions for ξ to be a magnetic map \u0000 with respect to ξ itself and the Kahler 2-form. In this paper we give new \u0000 examples of magnetic vector fields.","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133806084","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: 3
A note on divided differences 关于分歧的注释
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM1512147G
I. Gavrea, M. Ivan
{"title":"A note on divided differences","authors":"I. Gavrea, M. Ivan","doi":"10.2298/PIM1512147G","DOIUrl":"https://doi.org/10.2298/PIM1512147G","url":null,"abstract":"We obtain a new recurrence formula for sequences of divided differences. In a \u0000 particular case, the recurrence formula simplifies the classical \u0000 Newton-Girard identities relating power sums and elementary symmetric \u0000 polynomials.","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115618342","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: 9
ON SCALING AND REGULAR VARIATION 关于缩放和规则变化
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM140202002B
N. Bingham
{"title":"ON SCALING AND REGULAR VARIATION","authors":"N. Bingham","doi":"10.2298/PIM140202002B","DOIUrl":"https://doi.org/10.2298/PIM140202002B","url":null,"abstract":"We survey scaling arguments, both asymptotic (involving regular variation) and exact (involving self-similarity), in various areas of mathemat- ical analysis and mathematical physics. 1. Scaling and Fechner's law There is a sizeable body of theory to the effect that, where two related physically meaningful functions f and g have no natural scale in which to measure their units, and are reasonably smooth, then their relationship is given by a power law: (F)","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114519865","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: 7
ON MINIMAL ORDERED STRUCTURES 关于最小有序结构
Publications De L'institut Mathematique Pub Date : 1900-01-01 DOI: 10.2298/PIM0578065T
Predrag Tanovic
{"title":"ON MINIMAL ORDERED STRUCTURES","authors":"Predrag Tanovic","doi":"10.2298/PIM0578065T","DOIUrl":"https://doi.org/10.2298/PIM0578065T","url":null,"abstract":"We partially describe minimal, first-order structures which have a strong form of the strict order property. An infinite first-order structure is minimal if its each definable (possibly with parameters) subset is either finite or co-finite. It is strongly minimal if the mini- mality is preserved in elementarily equivalent structures. While strongly minimal structures were investigated more closely in a number of papers beginning with (4) and (1), there are a very few results on minimal but not strongly minimal structures. For some examples see (2) and (3). In this paper we shall consider minimal, ordered structures. A first-order struc- ture M0 = (M0;:::) is ordered if there is a binary relation < on M0, which is definable possibly with parameters from M0, irreflexive, antisymmetric, transitive and has arbitrarily large finite chains. We usually distinguish (one) such relation by absorbing the involved parameters into the language and assuming that < is an interpretation of a relation symbol from the language, in which case we write","PeriodicalId":416273,"journal":{"name":"Publications De L'institut Mathematique","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114694703","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: 5
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