Geodesic
On the minimum rainbow subgraph number of a graph
Ars Mathematica Contemporanea, Tome 6 (2013) no. 1, pp. 83-88.

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We consider the Minimum Rainbow Subgraph problem (MRS): Given a graph G, whose edges are coloured with p colours. Find a subgraph F ⊆ G of minimum order and with p edges such that each colour occurs exactly once. This problem is NP-hard and APX-hard. For a given graph G and an edge colouring c with p colours we define the rainbow subgraph number rs(G, c) to be the order of a minimum rainbow subgraph of G with size p. In this paper we will show lower and upper bounds for the rainbow subgraph number of a graph.
DOI : 10.26493/1855-3974.246.94d
Keywords: Edge colouring, rainbow subgraph. 
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Ingo Schiermeyer. On the minimum rainbow subgraph number of a graph. Ars Mathematica Contemporanea, Tome 6 (2013) no. 1, pp. 83-88. doi : 10.26493/1855-3974.246.94d. http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.246.94d/

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