An edge-deleted subgraph of a graph G is a subgraph obtained from G by the deletion of an edge. The Edge Reconstruction Conjecture asserts that every simple finite graph with four or more edges is determined uniquely, up to isomorphism, by its collection of edge-deleted subgraphs. A class of graphs
Nearly acyclic graphs are reconstructible
β Scribed by Bennet Manvel; Joseph M. Weinstein
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 815 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
We prove that a graph G is reconstructible if G has a node v with Gβv acyclic. The proof uses colored graphs and shows how to reconstruct some graphs from pieces which share a common subgraph having few automorphisms.
π SIMILAR VOLUMES
The Edge Reconstruction Conjecture states that all graphs with at least four edges are determined by their edge-deleted subgraphs. We prove that this is true for claw-free graphs, those graphs with no induced subgraph isomorphic to K,,3. This includes line graphs as a special case.
It is proved that for every constant ~ > 0 and every graph G on n vertices which contains no odd cycles of length smaller than ~n, G can be made bipartite by removing (15/~}ln(10/~)) vertices. This resuIt is best possible except for a constant factor. Moreover, it is shown that one can destroy all o
It is shown that the Reconstruction Conjecture is true for all finite graphs if it is true for the 2-connected ones. We shall, for the most part, use the terminology of [2] and [ 4 ] . Graphs will be finite, simple, and undirected. Let G be a graph and u E V(G). Denote by d(u) the degree of u in G
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Let H be a fixed graph. We show that any H-minor free graph G of high enough girth has circular chromatic number arbitrarily close to two. Equivalently, each such graph G admits a homomorphism to a large odd circuit. In particular, graphs of high girth and of bounded genus, or of bounded tree width,