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
Packing triangles in bounded degree graphs
β Scribed by Alberto Caprara; Romeo Rizzi
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 103 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0020-0190
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β¦ Synopsis
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 is APX-hard for general graphs and NP-hard for planar graphs if the maximum degree is 4 (respectively 5) or more.
π SIMILAR VOLUMES
## Abstract We prove results on partitioning graphs __G__ with bounded maximum degree. In particular, we provide optimal bounds for bipartitions __V__(__G__) = __V__~1~ βͺ __V__~2~ in which we minimize {__e__(__V__~1~), __e__(__V__~2~)}. Β© 2004 Wiley Periodicals, Inc. J Graph Theory 46: 131β143, 200
Let %(n; e) denote the class of graphs on n vertices and e edges. Define f(n, e) = min max{C:=, d(u,):{u,, up, uJ} induces a triangle in G}, where the maximum is taken over all triangles in the graph G and the minimum is taken over all G in %(n; e). From Turan's theorem, f(n, e) = 0 if e 5 n 2 / 4 ;
## 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__