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THE NON-BRAID GRAPH OF DIHEDRAL GROUP Dn 钝化组的非线性图 Dn
IF 0.3 Q4 Mathematics Pub Date : 2024-05-14 DOI: 10.22342/jims.30.1.1401.110-120
Hubbi Muhammad, Rambu Maya Imung Maharani, Sri Nurhayati, Mira Wadu, Yeni Susanti
We introduce the non-braid graph of a group G, denoted by ζ(G), as a graph with vertex set G B(G), where B(G) is the braider of G, defined as the set {x ∈ G | (∀y ∈ G)xyx = yxy}, and two distinct vertices x and y are joined by an edge if and only if xyx ̸ = yxy. In this paper particularly we give the independent number, the vertex chromatic number, the clique number, and the minimum vertex cover of non-braid graph of dihedral group Dn
我们将群 G 的无辫图(用 ζ(G)表示)引入为具有顶点集 G B(G) 的图,其中 B(G) 是 G 的辫图,定义为集合 {x∈G | (∀y∈G)xyx = yxy},并且当且仅当 xyx ̸ = yxy 时,两个不同的顶点 x 和 y 通过边连接。本文特别给出了二面角组 Dn 的非辫子图的独立数、顶点色度数、小群数和最小顶点覆盖率。
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引用次数: 0
Generalised (k, t)-Narayana sequence 广义(k,t)-纳拉亚纳序列
IF 0.3 Q4 Mathematics Pub Date : 2024-05-14 DOI: 10.22342/jims.30.1.1432.121-138
Roji Bala Singla, Vinod Mishra
In this paper, we introduces Narayana sequence in two parameters, namely, (k, t)-Narayana sequence, which is generalization of classical Narayana sequence and provide some identities and matrix expressions. Further, we find relations between (k, t)-Narayana numbers and determinants and permanents of some Hessenberg matrices. We study recurrence relations and the sum of the first n terms of this sequence. We obtain some properties from matrices. Additionally, we define (k, t)−Narayana sequence for negative subscripts and derive some relations.
本文介绍了两个参数的 Narayana 序列,即 (k, t)-Narayana 序列,它是经典 Narayana 序列的广义化,并提供了一些等式和矩阵表达式。此外,我们还发现了 (k, t)-Narayana 数与一些海森伯矩阵的行列式和恒等式之间的关系。我们研究了该序列的递推关系和前 n 项之和。我们从矩阵中获得了一些性质。此外,我们还定义了负下标 (k, t)-Narayana 序列,并推导出一些关系。
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引用次数: 0
Hub Parameters of Hypergraph 超图的枢纽参数
IF 0.3 Q4 Mathematics Pub Date : 2024-04-09 DOI: 10.22342/jims.30.1.1443.100-109
Nandhini Chandrasekar, K. K. Myithili
A hypergraph is an extension of a graph in which one edge can connect any number of vertices. In contrary, an edge connects exactly two vertices in a graph.In this paper we introduce hub-hyperpath, hubset and hubnumber of a hypergraph. Also we defined the hubnumber of a different types of hypergraphs and analyze some of its properties. Then the hub number of a hypergraph is compared with its dual hypergraph. Hubset can be useful for various tasks, such as targeted marketing and social networks. Additionally, finding the hub number of a graph is useful in network security, as it helps in identifying nodes that, if compromised, could have a significant impact on the overall network.
超图是图的扩展,其中一条边可以连接任意数量的顶点。本文介绍了超图的 hub-hyperpath、hubset 和 hubnumber。此外,我们还定义了不同类型超图的枢纽数,并分析了它的一些性质。然后,将一个超图的集线器数与它的对偶超图进行比较。Hubset 可用于各种任务,如定向营销和社交网络。此外,找到一个图的集线器数量在网络安全方面也很有用,因为它有助于识别那些一旦被破坏就会对整个网络产生重大影响的节点。
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引用次数: 0
On Weakly S-Prime Elements of Lattices 论网格的弱 S-Prime 元素
IF 0.3 Q4 Mathematics Pub Date : 2024-04-09 DOI: 10.22342/jims.30.1.1604.89-99
S. E. Atani
Let £ be a bounded distributive lattice and S a join-subset of £. In this paper, we introduce the concept of S-prime elements (resp. weakly S-prime elements) of £. Let p be an element of £ with S ∧p = 0 (i.e. s∧p = 0 for all s ∈ S). We say that p is an S-prime element (resp. a weakly S-prime element) of £ if there is an element s ∈ S such that for all x, y ∈ £ if p ≤ x ∨ y (resp. p ≤ x ∨ y 6= 1), then p ≤ x ∨ s or p ≤ y ∨ s. We extend the notion of S-prime property in commutative rings to S-prime property in lattices.
设 £ 是有界分布网格,S 是 £ 的连接子集。在本文中,我们引入了 S-prime 元素(即弱 S-prime 元素)的概念。设 p 是 £ 的元素,且 S ∧p = 0(即对于所有 s∈ S,s∧p = 0)。如果有一个元素 s∈S 使得对于所有 x, y∈ £ 如果 p ≤ x ∨ y (或者 p≤ x ∨ y 6= 1),那么 p ≤ x ∨ s 或者 p ≤ y ∨ s,我们就说 p 是 £ 的 S-prime 元素(或者弱 S-prime 元素)。
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引用次数: 0
The Characterization of Almost Prime Submodule on the 6 Finitely Generated Module over Principal Ideal Domain 主理想域上 6 个有限生成模块上的几乎素子模块的特征
IF 0.3 Q4 Mathematics Pub Date : 2024-04-07 DOI: 10.22342/jims.30.1.1396.63-76
I. Gede, Adhitya Wisnu Wardhana, Pudji Astuti, Intan Muchtadi-Alamsyah
In most cases, almost prime submodules are equivalent to prime submodules, but in a finitely generated module, it is not necessarily equivalent. Based on the fact that a finitely generated module over a principal ideal domain can be decomposed into a free part and a torsion part, we give a new approach to the characteristic of almost prime submodules in the finitely generated module, especially we point out the cases when the submodules are almost prime but not prime.
在大多数情况下,近素子模等价于素子模,但在有限生成模中,近素子模并不一定等价。基于主理想域上的有限生成模块可以分解为自由部分和扭转部分这一事实,我们给出了有限生成模块中几乎质子模块特性的新方法,特别是我们指出了子模块几乎是质子但不是质子的情况。
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引用次数: 0
Analytical Solution of Equations Governing Aligned Plane Rotating Magnetohydrodynamic Fluid Through Porous Media by Martin’s Method 用马丁法分析解决多孔介质中的对齐平面旋转磁流体方程
IF 0.3 Q4 Mathematics Pub Date : 2024-04-04 DOI: 10.22342/jims.30.1.1356.40-62
Birendra Kumar Vishwakarma Birendra, Sayantan Sil, Manoj Kumar
This investigation is an approach to setup an analytical solution of steady plane allied MHD fluid flow having infinite electrical conductivity in a rotating frame through porous media by Martin’s method. The governing non-linearequations of the fluid flow are transformed into a new form called Martin’s form by employing differential geometry where the curvilinear co-ordinates (Φ, Ψ) in the plane of flow shows that, the co-ordinate lines Ψ are the streamlines of flow and the co-ordinate lines Φ are arbitrary constants. Exact solution is obtained and velocity,vorticity, current density magnetic field and pressure distribution are found out. Also, the diagrams have been plotted to sketch the streamline patterns and to study variation of pressure function with angular velocity.
本研究采用马丁法对旋转框架中通过多孔介质的具有无限导电性能的稳定平面联合 MHD 流体流进行分析求解。通过使用微分几何,将流体流动的支配非线性方程转换为一种称为马丁方程的新形式,其中流动平面内的曲线坐标(Φ、Ψ)表明,坐标线 Ψ 是流动的流线,坐标线 Φ 是任意常数。求得了精确解,并得出了速度、涡度、电流密度磁场和压力分布。此外,还绘制了图表以勾勒流线模式,并研究压力函数随角速度的变化。
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引用次数: 0
Modified Multiple Decrement Table and Its Credibility Based on Factor Characteristics 基于因子特征的修正倍数递减表及其可信度
IF 0.3 Q4 Mathematics Pub Date : 2023-07-31 DOI: 10.22342/jims.29.2.1581.245-258
Randi Deautama, Kurnia Novita Sari
The 2019 Indonesian Mortality Table IV (TMI IV) involved 52 life insurance companies in Indonesia during the study period from 2013 to 2017. From the data, there may be differences in the characteristics of company customers so that the use of TMI IV is not in accordance with these characteristics. In life insurance companies, there are types of coverage (causes), namely: NDPA, which means death due to illness or accident; PAD, which means reimbursement of medical expenses, and SRD, which is the cancellation of the policy so that the coverage ends. The Companies can construct a Life Table involving multiple causes called a Multiple Decrement (MD) Table. This table is modified into a Modified Multiple Decrement Table (MDT) by adding factors to the causes in the form of regions. The clustering of factors needs to be done to reduce the complexity of the calculation. Using the K-means method, the grouping of regions R1R9 is divided into the following: PAD causes (3 groups) and SRD (2 groups). MDT is obtained from the relationship between MD and the Associated Single Decrement (ASD). The Annual Exposure Method was used to calculate the probability of causes. Furthermore, extrapolation is performed on the probability of cause, for which there is no value, and graduation is performed on the less smooth probability of cause. Then, credibility theory is used to determine the credibility level of the industry. The industry-credible probability of cause has a value between the observed value and the industry value (TMI IV).
在 2013 年至 2017 年的研究期间,2019 年印度尼西亚死亡率表 IV(TMI IV)涉及印度尼西亚的 52 家人寿保险公司。从数据来看,公司客户的特征可能存在差异,因此 TMI IV 的使用与这些特征并不相符。在人寿保险公司中,保险(原因)有以下几种类型:NDPA,即因疾病或事故死亡;PAD,即报销医疗费用;SRD,即取消保单,从而结束保险。公司可以构建一个涉及多种原因的生命表,称为多重递减表(MD)。通过以区域的形式向原因添加因素,将该表修改为修改后的多重递减表(MDT)。为了降低计算的复杂性,需要对因素进行聚类。使用 K 均值法将区域 R1R9 分组如下:PAD 原因(3 组)和 SRD(2 组)。MDT 由 MD 与相关单项递减(ASD)之间的关系得出。采用年度暴露法计算病因概率。此外,对没有数值的原因概率进行外推法,对不太平稳的原因概率进行分级法。然后,利用可信度理论确定行业可信度水平。行业可信的原因概率值介于观测值和行业值之间(TMI IV)。
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引用次数: 0
On A Group Involving The Automorphism of The Janko Group J2 关于涉及Janko群自同构的群[j]
Q4 Mathematics Pub Date : 2023-07-31 DOI: 10.22342/jims.29.2.1371.197-216
Ayoub Basheer
The Janko sporadic simple group J2 has an automorphism group 2. Using the electronic Atlas of Wilson [22], the group J2:2 has an absolutely irreducible module of dimension 12 over F2. It follows that a split extension group of the form 2^12:(J2:2) := G exists. In this article we study this group, where we compute its conjugacy classes and character table using the coset analysis technique together with Clifford-Fischer Theory. The inertia factor groups of G will be determined by analysing the maximal subgroups of J2:2 and maximal of the maximal subgroups of J2:2 together with various other information. It turns out that the character table of G is a 64×64 real valued matrix, while the Fischer matrices are all integer valued matrices with sizes ranging from 1 to 6.
Janko偶发单群J2有一个自同构群2。利用Wilson[22]的电子图谱,群J2:2在F2上有一个维数为12的绝对不可约模。因此,存在一个形式为2^12:(J2:2):= G的分裂扩展群。在本文中,我们研究了这个群,我们使用协集分析技术和Clifford-Fischer理论计算了它的共轭类和特征表。通过分析J2:2的极大子群和J2:2的极大子群中的极大子群,结合其他各种信息,确定G的惯性因子群。结果表明,G的字符表是一个64×64实值矩阵,而Fischer矩阵都是整数矩阵,大小从1到6不等。
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引用次数: 1
On Conditions for Controllability and Local Regularity of A System of Differential Equations 论微分方程系统的可控性和局部正则性条件
IF 0.3 Q4 Mathematics Pub Date : 2023-07-31 DOI: 10.22342/jims.29.2.1584.259-270
Ahmad Hadra Zuhri, Yudi Soeharyadi, Jalina Widjaja
We consider a system of differential equations on a Banach space X given by: x'(t) = Ax(t) + u(t)f(t, x(t)), x(0) = x0, where A is an infinitesimal generator of a C0-semigroup, f : R0+ × X → X is a locally Lipschitz function, and u ∈ Lp([0, T], R) is a control defined on [0, T] with 1 < p ≤ ∞. Using the Compactness Principle and the generalization of Gronwalls Lemma, the system is shown to be controllable for a γ-bounded function f. Another result of this study is the local existence and the uniqueness of the solution of the system for locally bounded function f through weighted ω-norm.
我们考虑巴拿赫空间 X 上的微分方程系统,其给定方程为x'(t) = Ax(t) + u(t)f(t, x(t)), x(0) = x0,其中 A 是 C0 半群的无穷小生成器,f :f : R0+ × X → X 是局部 Lipschitz 函数,u∈ Lp([0, T], R) 是定义在 [0, T] 上的控制,1 < p ≤ ∞。利用紧凑性原理和 Gronwalls Lemma 的广义,证明该系统对于一个 γ 有界函数 f 是可控的。本研究的另一个结果是通过加权 ω 准则证明该系统的解对于局部有界函数 f 的局部存在性和唯一性。
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引用次数: 0
Nonsplit Graphs with Split Maximal Induced Subgraphs 具有分裂极大诱导子图的非分裂图
Q4 Mathematics Pub Date : 2023-07-31 DOI: 10.22342/jims.29.2.988.217-234
S Monikandan, V Manikandan
A split graph is a graph in which the vertices can be partitioned into an independent set and a clique. A graph is split if and only if it has no induced subgraph isomorphic to C5, C4 or 2K2, which is a well-known characterization for split graph. A property of a graph G is recognizable if it can be recognized from the collection of all maximal proper induced subgraphs of G. We show that any nonsplit graph can have at most five split maximal induced subgraphs. Also we list out all C5-free nonsplit graphs having split maximal induced subgraphs, which is the main and, in fact, tedious result of this paper
分割图是顶点可以划分为独立集合和团的图。当且仅当图不存在与C5、C4或2K2同构的诱导子图时,图是分裂的,这是分裂图的一个众所周知的特征。如果能从G的所有极大固有诱导子图的集合中识别出图G的一个性质,则该性质是可识别的。我们证明了任何非分裂图最多可以有5个分裂极大诱导子图。我们还列出了所有具有极大分裂子图的无c5非分裂图,这是本文的主要结果,实际上也是乏味的结果
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引用次数: 0
期刊
Journal of the Indonesian Mathematical Society
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