We consider the two problems of finding the maximum number of node disjoint triangles and edge disjoint triangles in an undirected graph. We show that the first (respectively second) problem is polynomially solvable if the maximum degree of the input graph is at most 3 (respectively 4), whereas it i
Packing and covering triangles in graphs
β Scribed by P.E. Haxell
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 184 KB
- Volume
- 195
- Category
- Article
- ISSN
- 0012-365X
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β¦ Synopsis
It is shown that if G is a graph such that the maximum size of a set of pairwise edge-disjoint triangles is v(G), then there is a set C of edges of G of size at most (3 -e)v(G) such that E(T) N C 7~ 0 for every triangle T of G, where e> 3. This is the first nontrivial bound known for a long-standing conjecture of Tuza.
π SIMILAR VOLUMES
## Abstract How few edgeβdisjoint triangles can there be in a graph __G__ on __n__ vertices and in its complement $\overline {G}$? This question was posed by P. ErdΕs, who noticed that if __G__ is a disjoint union of two complete graphs of order __n__/2 then this number is __n__^2^/12β+β__o__(__n__
Zs. Tuza conjectured that if a simple graph G does not contain more than k pairwise edge disjoint triangles, then there exists a set of at most 2k edges which meets all triangles in G. We prove this conjecture for K,, 3 -free graphs (graphs that do not contain a homeomorph of K,. 3). Two fractional