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Topology invariance in Percolation Thresholds

Serge Galam, Alain Mauger

cond-mat.dis-nnarXiv:cond-mat/9812383

Abstract

An universal invariant for site and bond percolation thresholds (pcs and pcb respectively) is proposed. The invariant writes pcs1/aspcb-1/ab=δ/d where as, ab and δare positive constants,and d the space dimension. It is independent of the coordination number, thus exhibiting a topology invariance at any d.The formula is checked against a large class of percolation problems, including percolation in non-Bravais lattices and in aperiodic lattices as well as rigid percolation. The invariant is satisfied within a relative error of 5% for all the twenty lattices of our sample at d=2, d=3, plus all hypercubes up to d=6.

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