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Message passing for the coloring problem: Gallager meets Alon and Kahale

Abstract : Message passing algorithms are popular in many combinatorial optimization problems. For example, experimental results show that \emphsurvey propagation (a certain message passing algorithm) is effective in finding proper k-colorings of random graphs in the near-threshold regime. In 1962 Gallager introduced the concept of Low Density Parity Check (LDPC) codes, and suggested a simple decoding algorithm based on message passing. In 1994 Alon and Kahale exhibited a coloring algorithm and proved its usefulness for finding a k-coloring of graphs drawn from a certain planted-solution distribution over k-colorable graphs. In this work we show an interpretation of Alon and Kahale's coloring algorithm in light of Gallager's decoding algorithm, thus showing a connection between the two problems - coloring and decoding. This also provides a rigorous evidence for the usefulness of the message passing paradigm for the graph coloring problem.
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Sonny Ben-Shimon, Dan Vilenchik. Message passing for the coloring problem: Gallager meets Alon and Kahale. 2007 Conference on Analysis of Algorithms, AofA 07, 2007, Juan les Pins, France. pp.235-246. ⟨hal-01184794⟩

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