Gregory.Kucherov@loria.fr

http://www.loria.fr/~kucherov

INRIA/LORIA, 615, rue du Jardin Botanique, BP 101, 54602 Villers-les-Nancy Cedex, FRANCE

We first present the Manacher algorithm (1975) - a beautiful algorithm for computing, in linear time, all palindromes in a string. We then turn to the problem of computing longest extension functions, that arises in particular in computing periodicities in strings. For that problem, we show an algorithm that presents an interesting analogy with the Manacher algorithm and slightly improves the original Main and Lorentz algorithm for this problem (1984).

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