Spaces of tilings, finite telescopic approximations and gap-labelling

Details Spaces of tilings, finite telescopic approximations and gap-labelling Spaces of tilings, finite telescopic approximations and gap-labelling

2001-09-10

arxiv.org/abs/math/0109062v2

Mathematics

Dynamical Systems

45 pages

Scientific paper

For a large class of tilings, including the Penrose tiling in two dimension as well as the icosahedral ones in 3 dimension, the continuous hull of such a tiling inherits a minimal lamination structure with flat leaves and a transversal which is a Cantor set. In this case, we show that the continuous hull can be seen as the projective limit of a suitable sequence of branched, oriented and flat compact manifolds.The algebraic topological features related to this sequence reflect the dynamical properties of the action on the continuous hull. In particular the set of positive invariant measures of this action turns to be a convex cone, canonically associated with the orientation, in the projective limit of the top homology groups of the branched manifolds. As an application of this construction we prove a gap-labelling theorem.

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