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Random Sampling of Plane Partitions

Published online by Cambridge University Press:  02 November 2009

OLIVIER BODINI
Affiliation:
LIP6 – Équipe Spiral, 104 avenue du Président Kennedy, 75016 Paris, France (e-mail: bodini@calfor.lip6.frcarine.pivoteau@calfor.lip6.fr)
ÉRIC FUSY
Affiliation:
LIX, École Polytechnique, 91128 Palaiseau Cedex, France (e-mail: fusy@lix.polytechnique.fr)
CARINE PIVOTEAU
Affiliation:
LIP6 – Équipe Spiral, 104 avenue du Président Kennedy, 75016 Paris, France (e-mail: bodini@calfor.lip6.frcarine.pivoteau@calfor.lip6.fr)
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Abstract

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This article presents uniform random generators of plane partitions according to size (the number of cubes in the 3D interpretation). Combining a bijection of Pak with the method of Boltzmann sampling, we obtain random samplers that are slightly superlinear: the complexity is O(n(ln n)3) in approximate-size sampling and O(n4/3) in exact-size sampling (under a real-arithmetic computation model). To our knowledge, these are the first polynomial-time samplers for plane partitions according to size (there exist polynomial-time samplers of another type, which draw plane partitions that fit inside a fixed bounding box). The same principles yield efficient samplers for (a × b)-boxed plane partitions (plane partitions with two dimensions bounded), and for skew plane partitions. The random samplers allow us to perform simulations and observe limit shapes and frozen boundaries, which have been analysed recently by Cerf and Kenyon for plane partitions, and by Okounkov and Reshetikhin for skew plane partitions.

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Copyright
Copyright © Cambridge University Press 2009