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As a generalization of the traditional connectivity, the g-component edge connectivity c{\lambda}g(G) of a non-complete graph G is the minimum number of edges to be deleted from the graph G such that the resulting graph has at least g…

Combinatorics · Mathematics 2021-05-12 Dong Liu , Pingshan Li , Bicheng Zhang

The $g$-component edge connectivity $c\lambda_g(G)$ of a non-complete graph $G$ is the minimum number of edges whose deletion results in a graph with at least $g$ components. In this paper, we determine the component edge connectivity of…

Combinatorics · Mathematics 2018-03-06 Shuli Zhao , Weihua Yang

The $g$-extra edge-connectivity is an important measure for the reliability of interconnection networks. Recently, Yang et al. [Appl. Math. Comput. 320 (2018) 464--473] determined the $3$-extra edge-connectivity of balanced hypercubes…

Combinatorics · Mathematics 2020-07-07 Yulong Wei , Rong-hua Li , Weihua Yang

Given a connected graph $G$ and a non-negative integer $g$, the {\em $g$-extra connectivity} $\k_g(G)$ of $G$ is the minimum cardinality of a set of vertices in $G$, if it exists, whose deletion disconnects $G$ and leaves each remaining…

Combinatorics · Mathematics 2018-01-29 Jin-Xin Zhou

This paper considers a kind of generalized measure $\lambda_s^{(h)}$ of fault tolerance in a hypercube-like graph $G_n$ which contain several well-known interconnection networks such as hypercubes, varietal hypercubes, twisted cubes,…

Combinatorics · Mathematics 2012-12-21 Xiang-Jun Li , Jun-Ming Xu

The generalized $k$-connectivity of a graph $G$, denoted by $\kappa_k(G)$, is the minimum number of internally edge disjoint $S$-trees for any $S\subseteq V(G)$ with $|S|=k$. The generalized $k$-connectivity is a natural extension of the…

Combinatorics · Mathematics 2024-05-23 Jing Wang , Xidao Luan , Yuanqiu Huang

The connectivity and edge connectivity of interconnection network determine the fault tolerance of the network. An interconnection network is usually viewed as a connected graph, where vertex corresponds processor and edge corresponds link…

Combinatorics · Mathematics 2020-01-06 Jia Guo

The connectivity is an important parameter to evaluate the robustness of a network. As a generalization, structure connectivity and substructure connectivity of graphs were proposed. For connected graphs $G$ and $H$, the $H$-structure…

Combinatorics · Mathematics 2022-11-23 Lina Ba , Hailun Wu , Heping Zhang

Reliability assessment of interconnection networks is critical to the design and maintenance of multiprocessor systems. The $(n, k)$-enhanced hypercube $Q_{n,k}$, as a variation of the hypercube $Q_{n}$, was proposed by Tzeng and Wei in…

Combinatorics · Mathematics 2025-10-29 Yali Sun , Mingzu Zhang , Xing Feng , Xing Yang

The restricted $h$-connectivity of a graph $G$, denoted by $\kappa^h(G)$, is defined as the minimum cardinality of a set of vertices $F$ in $G$, if exists, whose removal disconnects $G$ and the minimum degree of each component of $G-F$ is…

Combinatorics · Mathematics 2018-06-01 Huazhong Lü , Tingzeng Wu

The connectivity of a network directly signifies its reliability and fault-tolerance. Structure and substructure connectivity are two novel generalizations of the connectivity. Let $H$ be a subgraph of a connected graph $G$. The structure…

Combinatorics · Mathematics 2018-08-08 Huazhong Lü , Tingzeng Wu

Given a graph G, a non-negative integer h and a set of vertices S, the h-extra connectivity of G is the cardinality of a minimum set S such that G-S is disconnected and each component of G-S has at least h+1 vertices. The 2-extra…

Discrete Mathematics · Computer Science 2014-09-16 Mei-Mei Gu , Rong-Xia Hao , Jian-Bing Liu

The restricted edge-connectivity of a connected graph $G$, denoted by $\lambda^{\prime}(G)$, if it exists, is the minimum cardinality of a set of edges whose deletion makes $G$ disconnected and each component with at least 2 vertices. It…

Combinatorics · Mathematics 2024-01-30 Hazhe Ye , Yingzhi Tian

As the scale of data centers continues to grow, there is an increasing demand for interconnection networks to resist malicious attacks. Hence, it is necessary to evaluate the reliability of networks under various fault patterns. The family…

Combinatorics · Mathematics 2025-03-19 Shuqian Cheng , Mingzu Zhang , Sun-Yuan Hsieh , Eddie Cheng

The connectivity of a graph is an important parameter to evaluate its reliability. $k$-restricted connectivity (resp. $R^h$-restricted connectivity) of a graph $G$ is the minimum cardinality of a set $S$ of vertices in $G$, if exists, whose…

Computational Complexity · Computer Science 2026-01-15 Huazhong Lü , Tingzeng Wu

As a generalization of vertex connectivity, for connected graphs $G$ and $T$, the $T$-structure connectivity $\kappa(G, T)$ (resp. $T$-substructure connectivity $\kappa^{s}(G, T)$) of $G$ is the minimum cardinality of a set of subgraphs $F$…

Combinatorics · Mathematics 2022-11-23 Lina Ba , Heping Zhang

Let G be a connected graph and S be a set of vertices. The h-extra connectivity of G is the cardinality of a minimum set S such that G-S is disconnected and each component of G-S has at least h+1 vertices. The h-extra connectivity is an…

Discrete Mathematics · Computer Science 2013-09-23 Meimei Gu , Rongxia Hao

An edge subset \( S \subseteq E(G) \) is called a 3-restricted edge-cut if \( G - S \) is disconnected and each component of \( G - S \) contains at least three vertices. The 3-restricted edge-connectivity of a graph \( G \), denoted by \(…

Combinatorics · Mathematics 2025-12-01 Wenxin Wang , Yingzhi Tian

The component connectivity is the generalization of connectivity which is an parameter for the reliability evaluation of interconnection networks. The $g$-component connectivity $c\kappa_{g}(G)$ of a non-complete connected graph $G$ is the…

Combinatorics · Mathematics 2018-03-06 Shuli Zhao , Weihua Yang

Let $G$ be a graph with vertex set $V(G)$ and edge set $E(G)$. An edge subset $F\subseteq E(G)$ is called a restricted edge-cut if $G-F$ is disconnected and has no isolated vertices. The restricted edge-connectivity $\lambda'(G)$ of $G$ is…

Combinatorics · Mathematics 2023-01-31 Jiaqiong Yin , Yingzhi Tian
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