A CAT algorithm for the exhaustive generation of ice piles
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 44 (2010) no. 4, pp. 525-543.

We present a CAT (constant amortized time) algorithm for generating those partitions of n that are in the ice pile model IPM k (n), a generalization of the sand pile model SPM(n). More precisely, for any fixed integer k, we show that the negative lexicographic ordering naturally identifies a tree structure on the lattice IPM k (n): this lets us design an algorithm which generates all the ice piles of IPM k (n) in amortized time O(1) and in space O(n).

DOI : 10.1051/ita/2011004
Classification : 05A17, 68R99
Mots-clés : sand pile model, ice pile model, integer partitions, exhaustive generation, CAT algorithms, discrete dynamical systems 
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     title = {A {CAT} algorithm for the exhaustive generation of ice piles},
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Massazza, Paolo; Radicioni, Roberto. A CAT algorithm for the exhaustive generation of ice piles. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 44 (2010) no. 4, pp. 525-543. doi : 10.1051/ita/2011004. http://archive.numdam.org/articles/10.1051/ita/2011004/

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