## Abstract The restrictedโedgeโconnectivity of a graph __G__, denoted by ฮปโฒ(__G__), is defined as the minimum cardinality over all edgeโcuts __S__ of __G__, where __G__โ__S__ contains no isolated vertices. The graph __G__ is called ฮปโฒโoptimal, if ฮปโฒ(__G__)โ=โฮพ(__G__), where ฮพ(__G__) is the minimum
Sufficient conditions for maximally connected dense graphs
โ Scribed by Terunao Soneoka; Hiroshi Nakada; Makoto Imase; Claudine Peyrat
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 764 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
โฆ Synopsis
This paper considers the relations between the connectivity x or the edge-connectivity A of a graph and other parameters such as the number of vertices n, maximum degree A, minimum degree 6, diameter D and girth g. The following sufficient conditions for maximally connected graphs are derived.
6fir D <~g-2, g odd, [if D<~g 3, geven, .fif D<~g-1, godd, A = 0 [ ff D ~< g -2, g even.
These conditions are the best possible. From them some of the densest known graphs are proved to be maximally connected.
๐ SIMILAR VOLUMES
In this paper we give simple degree sequence conditions for the equality of edge-connectivity and minimum degree of a (di-)graph. One of the conditions implies results by Bollobรกs, Goldsmith and White, and Xu. Moreover, we give analogue conditions for bipartite (di-)graphs.
## Abstract Restricted edge connectivity is a more refined network reliability index than edge connectivity. A restricted edge cut __F__ of a connected graph __G__ is an edge cut such that __G__โ__F__ has no isolated vertex. The restricted edge connectivity ฮปโฒ is the minimum cardinality over all re
## Ainouche, A., Four sufficient conditions for hamiltonian graphs, Discrete Mathematics 89 (1991) 195-200.
## Abstract For a graph __G__, let __n__(__G__), ฮบ(__G__) and ฮด(__G__) denote the order, the connectivity, and the minimum degree of __G__, respectively. The paper contains some conditions on __G__ implying ฮบ(__G__) = ฮด(__G__). One of the conditions is that __n__(__G__) โค ฮด(__G__)(2__p__ โ1)/(2__p_
## Abstract Let __G__ be a 2โconnected graph of order __n.__ We show that if for each pair of nonadjacent vertices __x__,__y__ โ __V(G)__, then __G__ is Hamiltonian.