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Connected Outer-Hop Independent Dominating Sets in Graphs Under Some Binary Operations 某些二元运算下图的连通外跳独立支配集
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4766
Jahiri Manditong, Javier Hassan, Ladznar S. Laja, Amy A. Laja, N. H. M. Mohammad, Sisteta U. Kamdon
Let $G$ be a connected graph. A set $Dsubseteq V(G)$ is called a connected outer-hop independent dominating if $D$ is a connected dominating set and $V(G)s D$ is a hop independent set in $G$, respectively. The minimum cardinality of a connected outer-hop independent dominating set in $G$, denoted by $gamma_{c}^{ohi}(G)$, is called the connected outer-hop independent domination number of $G$. In this paper, we introduce and investigated the concept of connected outer-hop independent domination in a graph. We show that the connected outer-hop independent domination number and connected outer-independent domination number of a graph are incomparable. In fact, we find that their absolute difference can be made arbitrarily large. In addition, we characterize connected outer-hop independent dominating sets in graphs under some binary operations. Furthermore, these results are used to give exact values or bounds of the parameter for these graphs.
设$G$为连通图。如果$D$是连通控制集,$V(G) $ s $D$分别是$G$中的跳独立集,则集$D$称为连通外跳独立控制集。$G$中连通外跳独立支配集的最小基数,用$gamma_{c}^{ohi}(G)$表示,称为$G$的连通外跳独立支配数。本文引入并研究了图中连通外跳独立支配的概念。证明了图的连通外跳独立支配数和连通外跳独立支配数是不可比较的。事实上,我们发现它们的绝对差可以任意大。此外,我们还刻画了图在某些二元操作下的连通外跳独立支配集。此外,这些结果用于给出这些图的参数的精确值或边界。
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引用次数: 2
Another Look at Geodetic Hop Domination in a Graph 图中测地跳支配的另一种看法
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4810
C. J. Saromines, Sergio R. Canoy, Jr.
Let $G$ be an undirected graph with vertex and edge sets $V(G)$ and $E(G)$, respectively. A subset $S$ of vertices of $G$ is a geodetic hop dominating set if it is both a geodetic and a hop dominating set. The geodetic hop domination number of $G$ is the minimum cardinality among all geodetic hop dominating sets in $G$. Geodetic hop dominating sets in a graph resulting from the join of two graphs have been characterized. These characterizations have been used to determine the geodetic hop domination number of the graphs considered. A realization result involving the hop domination number and geodetic hop domination number is also obtained.
设$G$是一个无向图,其顶点集$V(G)$和边集$E(G)$分别具有。$G$的顶点子集$S$是一个测地跳控制集,如果它既是测地跳控制集又是跳控制集。$G$的测地跳支配数是$G$中所有测地跳支配集的最小基数。本文刻画了由两个图的连接而产生的图的测地跳控制集。这些表征已被用来确定所考虑的图的测地跳支配数。给出了包含跳数控制数和测地跳数控制数的实现结果。
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引用次数: 0
Global Stable Location-Domination in Graphs 图的全局稳定位置控制
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4748
Miguel Varo Ortega, Gina A. Malacas, Sergio R. Canoy, Jr.
In this paper, we introduce and investigate the concept of global stable location-domination in graphs. We also characterize the global stable locating-dominating sets in the join, edge corona, corona, and lexicographic product of graphs and determine the exact value or sharp bound of the corresponding global stable location-domination number.
本文引入并研究了图中全局稳定位置控制的概念。我们还刻画了图的连接、边冕、冕和字典积中的全局稳定定位支配集,并确定了相应的全局稳定定位支配数的精确值或锐界。
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引用次数: 0
$1$-movable $2$-Resolving Hop Domination in Graph $1$-可移动$2$-在图中求解跳支配
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4770
Angelica Mae Mahistrado, Helen M. Rara
Let $G$ be a connected graph. A set $S$ of vertices in $G$ is a 1-movable 2-resolving hop dominating set of $G$ if $S$ is a 2-resolving hop dominating set in $G$ and for every $v in S$, either $Sbackslash {v}$ is a 2-resolving hop dominating set of $G$ or there exists a vertex $u in big((V (G) backslash S) cap N_G(v)big)$ such that $big(S backslash {v}big) cup {u}$ is a 2-resolving hop dominating set of $G$. The 1-movable 2-resolving hop domination number of $G$, denoted by $gamma^{1}_{m2Rh}(G)$ is the smallest cardinality of a 1-movable 2-resolving hop dominating set of $G$. In this paper, we investigate the concept and study it for graphs resulting from some binary operations. Specifically, we characterize the 1-movable 2-resolving hop dominating sets in the join, corona and lexicographic products of graphs, and determine the bounds of the 1-movable 2-resolving hop domination number of each of these graphs.
设$G$是一个连通图。$G$中顶点的集合$S$是$G$的1-可移动2-解析跳跃支配集,如果$S$是$S$中的2-解析跳跃主导集,并且对于S$中的每个$v,$S反斜杠{v}$是$G$的2-解析跳支配集,或者存在顶点$uinbig((v(G)反斜杠S)cap N_G(v)big)$,使得$big(S反斜杠{v}big)cup {u}$G$是2-解析跳跃主宰集。$G$的1-可移动2-解析跳跃支配数,用$gamma表示^{1}_{m2Rh}(G)$是$G$的1-可移动2-解析跳跃支配集的最小基数。在本文中,我们研究了由一些二进制运算产生的图的概念并研究了它。具体地,我们刻画了图的连接、电晕和字典积中的1-可移动2-分辨跳跃支配集,并确定了这些图的1-可移2-分辨跳跃控制数的界。
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引用次数: 0
Finite Minimal Simple Groups Non-satisfying the Basis Property 不满足基性质的有限极小单群
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4871
Ahmad Al Khalaf, I. Taha
Let G be a finite group. We say that G has the Basis Property if every subgroup H of G has a minimal generating set (basis), and any two bases of H have the same cardinality. A group G is called minimal not satisfying the Basis Property if it does not satisfy the Basis Property, but all its proper subgroups satisfy the Basis Property. We prove that the following groups PSL(2, 5) ∼A5, PSL(2, 8) , are minimal groups non satisfying the Basis Property, but the groups PSL(2, 9), PSL(2, 17) and PSL(3, 4) are not minimal and not satisfying the Basis Property.
设G是一个有限群。我们说G具有基性质,如果G的每个子群H都有一个极小生成集(基),并且H的任意两个基具有相同的基数。群G称为不满足基性质的极小群,如果它不满足基属性,但它的所有子群都满足基属性。我们证明了以下群PSL(2,5)~A5,PSL(2,8)是不满足基性质的极小群,但群PSL。
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引用次数: 0
Multigrid Methods for the Solution of Nonlinear Variational Inequalities 求解非线性变分不等式的多重网格方法
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4835
Nesba Nour El Houda, Beggas Mohammed, Belouafi Essaid, I. Ahmad, H. Ahmad, Sameh E Askar
In this research, we investigate the numerical solution of second member problems that depend on the solution obtained through a multigrid method. Specifically, we focus on the application of multigrid techniques for solving nonlinear variational inequalities. The main objective is to establish the uniform convergence of the multigrid algorithm. To achieve this, we employ elementary subdifferential calculus and draw insights from the convergence theory of nonlinear multigrid methods.
在这项研究中,我们研究了依赖于通过多重网格方法获得的解的二元问题的数值解。具体来说,我们关注多重网格技术在求解非线性变分不等式中的应用。主要目的是建立多重网格算法的一致收敛性。为了实现这一点,我们使用了初等次微分演算,并从非线性多重网格方法的收敛理论中获得了见解。
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引用次数: 0
Solving nth-order Integro-differential Equations by Novel Generalized Hybrid Transform 用新型广义混合变换求解n阶积分微分方程
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4840
Sana Ullah Khan, Asif Khan, A. Ullah, Shabir Ahmad, Fuad A. Awwad, Emad A. A. Ismail, Shehu Maitama, Huzaifa Umar, H. Ahmad
Recently, Shehu has introduced an integral transform called Shehu transform, which generalizes the two well-known integrals transforms, i.e. Laplace and Sumudu transform. In the literature, many integral transforms were used to compute the solution of integro-differential equations (IDEs). In this article, for the first time, we use Shehu transform for the computation of solution of $n^{text{th}}$-order IDEs. We present a general scheme of solution for $n^{text{th}}$-order IDEs. We give some examples with detailed solutions to show the appropriateness of the method. We present the accuracy, simplicity, and convergence of the proposed method through tables and graphs.
最近,舍虎提出了一种积分变换,称为舍虎变换,它推广了两种著名的积分变换,即拉普拉斯变换和苏木都变换。在文献中,许多积分变换被用来计算积分微分方程的解。在本文中,我们首次使用Shehu变换来计算$n^{text{th}}$阶IDE的解。我们提出了$n^{text{th}}$阶IDE的一般解决方案。我们给出了一些例子和详细的解决方案,以表明该方法的适当性。我们通过表格和图表展示了所提出方法的准确性、简单性和收敛性。
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引用次数: 1
Strongly 2-Nil Clean Rings with Units of Order Two 单位为2阶的强2-Nil干净环
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4797
Renas T. M.Salim, N. Shuker
A ring R is considered a strongly 2-nil clean ring, or (strongly 2-NC ring for short), if each element in R can be expressed as the sum of a nilpotent and two idempotents that commute with each other. In this paper, further properties of strongly 2-NC rings are given. Furthermore, we introduce and explore a special type of strongly 2-NC ring where every unit is of order 2, which we refer to as a strongly 2-NC rings with U(R) = 2. It was proved that the Jacobson radical over a strongly 2-NC ring is a nil ideal, here, we demonstrated that the Jacobson radical over strongly 2-NC ring with U(R) = 2 is a nil ideal of characteristic 4. We compare this ring with other rings, since every SNC ring is strongly 2-NC, but not every unit of order 2, and if R is a strongly 2-NC with U(R) = 2, then R need not be SNC ring. In order to get N il(R) = 0, we added one more condition involving this ring.
如果环R中的每个元素可以表示为一个幂零和两个相互交换的幂等的和,则认为环R是一个强2-零干净环,或者(简称强2-NC环)。本文给出了强2-NC环的进一步性质。进一步,我们引入并探索了一种特殊类型的强2- nc环,其中每个单元都是2阶的,我们称之为U(R) = 2的强2- nc环。证明了强2- nc环上的Jacobson根是零理想,这里证明了U(R) = 2的强2- nc环上的Jacobson根是特征为4的零理想。我们将这个环与其他环进行比较,因为每个SNC环都是强2- nc,但不是每个2阶单位,如果R是U(R) = 2的强2- nc,则R不必是SNC环。为了使nil (R) = 0,我们增加了一个与这个环有关的条件。
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引用次数: 0
On Weighted Vertex and Edge Mostar Index for Trees and Cacti with Fixed Parameter 固定参数树和仙人掌的加权顶点和边Mostar指数
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4722
Farwa Asmat, Humaira Asmat, Sameh E Askar, H. Ahmad, Muhammad Ijaz Khan
It was introduced by Doˇsli ́c and Ivica et al. (Journal of Mathematical chemistry, 56(10) (2018): 2995–3013), as an innovative graph-theoretic topological identifier, the Mostar index is significant in simulating compounds’ thermodynamic properties in simulations, which is defined as sum of absolute values of the differences among nu(e|Ω) and nv(e|Ω) over all lines e = uv ∈ Ω, where nu(e|Ω) (resp. nv(e|Ω)) is the collection of vertices of Ω closer to vertex u (resp. v) than to vertex v (resp. u). Let C(n, k) be the set of all n-vertex cacti graphs with exactly k cycles and T(n, d) be the set of all n-vertex tree graphs with diameter d. It is said that a cacti is a connected graph with blocks that comprise of either cycles or edges. Beginning with the weighted Mostar index of graphs, we developed certain transformations that either increase or decrease index. To advance this analysis, we determine the extreme graphs where the maximum and minimum values of the weighted edge Mostar index are accomplished. Moreover, we compute the maximum weighted vertex Mostar invariant for trees with order n and fixed diameter d.
Mostar指数是由Do + sli + c和Ivica等人提出的(Journal of Mathematical chemistry, 56(10)(2018): 2995-3013),作为一种创新的图论拓扑标识符,它在模拟化合物的热力学性质方面具有重要意义,它被定义为所有直线e = uv∈Ω上nu(e|Ω)和nv(e|Ω)之间的差值的绝对值之和,其中nu(e|Ω)(代表p = uv∈Ω)。Nv (e|Ω))是离顶点u (resp. 0)更近的Ω的顶点集合。V)比到顶点V (p。设C(n, k)为所有恰好有k个环的n顶点仙人掌图的集合,T(n, d)为所有直径为d的n顶点树图的集合。我们说仙人掌是一个连通图,其块由环或边组成。从图的加权Mostar指数开始,我们开发了一些增加或减少指数的转换。为了推进这一分析,我们确定了加权边Mostar指数的最大值和最小值实现的极值图。此外,我们还计算了n阶且直径为d的树的最大加权顶点Mostar不变量。
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引用次数: 0
Note on Generalized Neighborhoods Structures in Fuzzy Bitopological Spaces 模糊双拓扑空间中广义邻域结构的注释
IF 0.7 Q1 MATHEMATICS Pub Date : 2023-07-30 DOI: 10.29020/nybg.ejpam.v16i3.4808
Ahlam Ahmed Alharbi, A. Kılıçman
This article's main aim is to study the concepts of the generalized neighborhood and generalized quasi-neighborhood in fuzzy bitopological spaces. It also introduces fundamental theorems for determining the relationships between them. Additionally, some significant examples were examined to demonstrate the significance of the interconnections, some theorems were also introduced to study some main properties of neighborhood structures. Finally, we also studied the concepts of closure, interior, and each of their critical theories and properties by generalized neighborhood systems in fuzzy bitopological spaces.
本文主要研究模糊双拓扑空间中广义邻域和广义拟邻域的概念。它还介绍了确定它们之间关系的基本定理。此外,通过一些有意义的例子说明了相互联系的重要性,并引入了一些定理来研究邻域结构的一些主要性质。最后,我们还研究了模糊双拓扑空间中广义邻域系统的闭包、内包及其各关键理论和性质。
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引用次数: 1
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European Journal of Pure and Applied Mathematics
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