Graphs with exactly one hamiltonian circuit
β Scribed by John Sheehan
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 221 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Let h(n) be the largest integer such that there exists a graph with n vertices having exactly one Hamiltonian circuit and exactly h(n) edges. We prove that h(n) = [n^2^/4]+1 (n β§ 4) and discuss some related problems.
π SIMILAR VOLUMES
The main result of this paper is the NP-completeness of the HAMILTONIAN CIRCUIT problem for chordal bipartite graphs. This is proved by a sophisticated reduction from SATISFIABILITY. As a corollary, HAMILTONIAN CIRCUIT is NP-complete for strongly chordal split graphs. On both classes the complexity
The problem of recognizing hamiltonian graphs is not Jriously difficult; in fack, Karp, Lawler and Tarjan [3] proved that it is NP-colnplete. Combined with Cook's theorem [l], this result suggests that the existence'= of a good characterization of nonhamiltcnian graphs is extremely unlikely. On the
Consider the subset graph G(n, k) whose vertex set C(n, k) is the set of all n-tuples of 'O's' and 'l's' with exactly k 'I's'. Let an edge exist between two vertices a and b in G(n,k) if and only if a can be transformed into b by the interchange of two adjacent coordinate values, with the first and
## Abstract Let __G__ be a 2βconnected graph of order __n.__ We show that if for each pair of nonadjacent vertices __x__,__y__ β __V(G)__, then __G__ is Hamiltonian.