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Mixing properties of colourings of the ℤd lattice
Published online by Cambridge University Press: 19 October 2020
Abstract
We study and classify proper q-colourings of the ℤd lattice, identifying three regimes where different combinatorial behaviour holds. (1) When
$q\le d+1$
, there exist frozen colourings, that is, proper q-colourings of ℤd which cannot be modified on any finite subset. (2) We prove a strong list-colouring property which implies that, when
$q\ge d+2$
, any proper q-colouring of the boundary of a box of side length
$n \ge d+2$
can be extended to a proper q-colouring of the entire box. (3) When
$q\geq 2d+1$
, the latter holds for any
$n \ge 1$
. Consequently, we classify the space of proper q-colourings of the ℤd lattice by their mixing properties.
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- © The Author(s), 2020. Published by Cambridge University Press
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