Three theorems in discrete random geometry

Details Three theorems in discrete random geometry Three theorems in discrete random geometry

2011-10-11

arxiv.org/abs/1110.2395v2

Mathematics

Probability

Error fixed in v2

Scientific paper

These notes are focused on three recent results in discrete random geometry, namely: the proof by Duminil-Copin and Smirnov that the connective constant of the hexagonal lattice is \sqrt{2+\sqrt 2}; the proof by the author and Manolescu of the universality of inhomogeneous bond percolation on the square, triangular, and hexagonal lattices; the proof by Beffara and Duminil-Copin that the critical point of the random-cluster model on Z^2 is \sqrt q/(1+\sqrt q). Background information on the relevant random processes is presented on route to these theorems. The emphasis is upon the communication of ideas and connections as well as upon the detailed proofs.

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