Reductions of the Graph Reconstruction Conjecture
β Scribed by R. Statman
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 283 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
β¦ Synopsis
In this note we shall show that the Graph Reconstruction Conjecture (also called the Kelly-Ulam conjecture [l, p. 1 I]) is equivalent to a conjecture about the algebraic properties of certain directed trees and their homomorphic images. We shall also show that the Graph Reconstruction Conjecture is equivalent to recognizing the (abstract) group of a graph from the tree (generalized "deck") of the graph.
π SIMILAR VOLUMES
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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
## Abstract Gol'dberg has recently constructed an infinite family of 3βcritical graphs of even order. We now prove that if there exists a __p__(β₯4)βcritical graph __K__ of odd order such that __K__ has a vertex __u__ of valency 2 and another vertex __v__ β __u__ of valency β€(__p__ + 2)/2, then ther
Dedicated ro the memory of Stan Ulam (31.