Asymptotic shapes for ergodic families of metrics on Nilpotent groups
Groups, geometry, and dynamics, Tome 11 (2017) no. 4, pp. 1307-1345

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DOI

Let Γ be a finitely generated virtually nilpotent group. We consider three closely related problems: (i) convergence to a deterministic asymptotic cone for an equivariant ergodic family of inner metrics on Γ, generalizing Pansu's theorem; (ii) the asymptotic shape theorem for first passage percolation for general (not necessarily independent) ergodic processes on edges of a Cayley graph of Γ; (iii) the sub-additive ergodic theorem over a general ergodic Γ-action. The limiting objects are given in terms of a Carnot–Carathéodory metric on the graded nilpotent group associated to the Mal'cev completion of Γ.
DOI : 10.4171/ggd/430
Classification : 37-XX, 53-XX
Mots-clés : Subadditive ergodic theorem, Carnot group, first passage percolation

Michael Cantrell  1   ; Alex Furman  1

1 University of Illinois at Chicago, USA
Michael Cantrell; Alex Furman. Asymptotic shapes for ergodic families of metrics on Nilpotent groups. Groups, geometry, and dynamics, Tome 11 (2017) no. 4, pp. 1307-1345. doi: 10.4171/ggd/430
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     title = {Asymptotic shapes for ergodic families of metrics on {Nilpotent} groups},
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