The Laurent phenomenon

Details The Laurent phenomenon The Laurent phenomenon

2001-04-25

arxiv.org/abs/math/0104241v1

Mathematics

Combinatorics

21 pages

Scientific paper

A composition of birational maps given by Laurent polynomials need not be given by Laurent polynomials; however, sometimes---quite unexpectedly---it does. We suggest a unified treatment of this phenomenon, which covers a large class of applications. In particular, we settle in the affirmative a conjecture of D.Gale and R.Robinson on integrality of generalized Somos sequences, and prove the Laurent property for several multidimensional recurrences, confirming conjectures by J.Propp, N.Elkies, and M.Kleber.

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