A simpler and better derandomization of an approximation algorithm for single source rent-or-buy

We present a very simple way of derandomizing the algorithm proposed by Gupta, Kumar and Roughgarden for Single Source Rent-or-Buy by using the method of conditional expectation. Using the improved analysis of Eisenbrand, Grandoni and Rothvoß, our derandomized algorithm has an approximation guarantee of 3.28.

• Type: Journal
• Year: 2007
• Where: ORL
• Authors: David P. Williamson, Anke van Zuylen
• Keywords: Conditional Expectation, ORL 2007, Simple Way, Single Source