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Combinatorics of Hard Particles on Planar Graphs

J. Bouttier, P. Di Francesco, E. Guitter

cond-mat.stat-mecharXiv:cond-mat/0211168

Abstract

We revisit the problem of hard particles on planar random tetravalent graphs in view of recent combinatorial techniques relating planar diagrams to decorated trees. We show how to recover the two-matrix model solution to this problem in this purely combinatorial language.

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