Approximate edge 3-coloring of cubic graphs

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1853/29735

Title: Approximate edge 3-coloring of cubic graphs
Author: Gajewar, Amita Surendra
Abstract: The work in this thesis can be divided into two different parts. In the first part, we suggest an approximate edge 3-coloring polynomial time algorithm for cubic graphs. For any cubic graph with n vertices, using this coloring algorithm, we get an edge 3-coloring with at most n/3 error vertices. In the second part, we study Jim Propp's Rotor-Router model on some non-bipartite graph. We find the difference between the number of chips at vertices after performing a walk on this graph using Propp model and the expected number of chips after a random walk. It is known that for line of integers and d-dimenional grid, this deviation is constant. However, it is also proved that for k-ary infinite trees, for some initial configuration the deviation is no longer a constant and say it is D. We present a similar study on some non-bipartite graph constructed from k-ary infinite trees and conclude that for this graph with the same initial configuration, the deviation is almost (k²)D.
Type: Thesis
URI: http://hdl.handle.net/1853/29735
Date: 2008-07-10
Publisher: Georgia Institute of Technology
Subject: Deterministic random walk
Cubic graphs
Edge 3-coloring
Propp model
Graph coloring
Graph algorithms
Department: Computing
Advisor: Committee Chair: Prof. Richard Lipton; Committee Member: Prof. Dana Randall; Committee Member: Prof. H. Venkateswaran
Degree: M.S.

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