Finite-reinforcement percolation conjecture for planar reinforced 2-out percolation

Consider the finite-α\alpha reinforced kk-out percolation model on Zd\mathbb Z^d, and let E\mathcal E_\infty be the set of edges that are eventually reinforced in every round. In the limiting case α=\alpha=\infty, this is the corresponding infinitely reinforced-edge configuration.

Finite-reinforcement percolation conjecture. Assume that d=k=2d=k=2. Then there exists α0>0\alpha_0>0 such that

P(E percolates)=1\mathbb P\big(\mathcal E_\infty\text{ percolates}\big)=1

whenever α>α0\alpha>\alpha_0.

This conjecture extends the limiting-model percolation conjecture to sufficiently large but finite reinforcement exponents. The paper presents it as plausible but does not prove it, so its resolution remains open.

Sources & referencesView supporting material

Primary source

Gideon Amir, Markus Heydenreich and Christian Hirsch, “Planar reinforced k-out percolation”, arXiv:2407.12484 (2024).

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