Edge Coloring and Decompositions of Weighted Graphs

We consider two generalizations of the edge coloring problem in bipartite graphs. The first problem we consider is the weighted bipartite edge coloring problem where we are given an edge-weighted bipartite graph G = (V, E) with weights w : E [0, 1]. The task is to find a proper weighted coloring of the edges with as few colors as possible. An edge coloring of the weighted graph is called a proper weighted coloring if the sum of the weights of the edges incident to a vertex of any color is at most one. We give a polynomial time algorithm for the weighted bipartite edge coloring problem which returns a proper weighted coloring using at most 2.25n colors where n is the maximum total weight incident at any vertex. This improves on the previous best bound of Correa and Goemans [5] which returned a coloring using 2.557n + o(n) colors. The second problem we consider is the Balanced Decomposition of Bipartite graphs problem where we are given a bipartite graph G = (V, E) and 1, . . . , k (0,...

• Type: Conference
• Year: 2008
• Where: ESA
• Authors: Uriel Feige, Mohit Singh
• Keywords: Algorithms, Bipartite Graph, Edge Coloring Problem, ESA 2008, Proper Weighted Coloring