The no free lunch and realistic search algorithms

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The no free lunch and realistic search algorithms
The No-Free-Lunch theorems (NFLTs) are criticized for being too general to be of any relevance to the real world scenario. This paper investigates, both formally and empirically, the implications of the NFLTs for realistic search algorithms. In the first part of the paper, by restricting ourselves to a specific performance measure, we derive a new NFL result for a class of problems which is not closed under permutations. In the second part, we discuss properties of this set which are likely to be true for realistic search algorithms. We provide empirical support for this in [1]. Categories and Subject Descriptors F.2 [Theory of Computation]: ANALYSIS OF ALGORITHMS AND PROBLEM COMPLEXITY General Terms Algorithms,Theory Keywords No Free Lunch, Genetic algorithms, Heuristics, Theory
Yossi Borenstein, Riccardo Poli
Added 23 Aug 2010
Updated 23 Aug 2010
Type Conference
Year 2006
Authors Yossi Borenstein, Riccardo Poli
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