Seyffarth, K., Packings and perfect path double covers of maximal planar graphs, Discrete Mathematics 117 (1993) 1833195. A maximal planar graph is a simple planar graph in which every face is a triangle, and a perfect packing of such a graph by 2-cliques and facial triangles corresponds to a parti
Perfect path double covers of graphs
β Scribed by J. A. Bondy
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 513 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0364-9024
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β¦ Synopsis
Abstract
A perfect path double cover (PPDC) of a graph G on n vertices is a family π« of n paths of G such that each edge of G belongs to exactly two members of π« and each vertex of G occurs exactly twice as an end of a path of π«. We propose and study the conjecture that every simple graph admits a PPDC. Among other things, we prove that every simple 3βregular graph admits a PPDC consisting of paths of length three.
π SIMILAR VOLUMES
## Abstract We prove in this paper that every simple graph __G__ admits a perfect path double cover (PPDC), i.e., a set of paths of __G__ such that each edge of __G__ belongs to exactly two of the paths and each vertex of __G__ is an end of exactly two of the paths, where a path of length zero is c
Let (G, w ) denote a simple graph G with a weight function w : β¬(G) -{0,1,2}. A path cover of (G, w ) is a collection of paths in G such that every edge e is contained in exactly w(e) paths of the collection. For a vertex u , w ( v ) is the sum of the weights of the edges incident with U ; U is call
It is shown that for any 4-regular graph G there is a collection F of paths of length 4 such that each edge of G belongs to exactly two of the paths and each vertex of G occurs exactly twice as an endvertex of a path of y. This proves a special case of a conjecture of Bondy. 0 1996 John Wiley & Sons
Any group of automorphisms of a graph G induces a notion of isomorphism between double covers of G. The corresponding isomorphism classes will be counted.