Minimum partition of an independence system into independent sets

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Given an independence system (E, P), the Minimum Partition Problem (MPP) seeks a partition of E into the least number of independent sets. This notion provides a unifying framework for a number of combinatorial optimisation problems, including various conditional colouring problems for graphs. The smallest integer n such that E can be partitioned into n independent sets is called the P-chromatic number of E. In this article we study MPP and the P-chromatic number with emphasis on connections with a few other well-studied optimisation problems. In particular, we show that the P-chromatic number of E is equal to the domination number of a split graph associated with (E, P). With the help of this connection we give a few upper bounds on the P-chromatic number of E in terms of some basic invariants of (E, P). © 2008 Elsevier B.V. All rights reserved.




Zhou, S. (2009). Minimum partition of an independence system into independent sets. Discrete Optimization, 6(1), 125–133.

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