Hub-and-spoke systems from symbolic dynamics can have completely positive mean dimension without uniformly positive mean dimension or entropy, with proofs linking entropy and mean dimension properties at the level of fixed covers.
Acta Math
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Explicit growth rates for billiard word complexity in hyperbolic (p,q)-polygons for even q, plus complete grammar rules for realizable paths using minimal tiling paths.
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Uniformly Positive Mean Dimension
Hub-and-spoke systems from symbolic dynamics can have completely positive mean dimension without uniformly positive mean dimension or entropy, with proofs linking entropy and mean dimension properties at the level of fixed covers.
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Complexity of Billiards in Polygons Associated to Hyperbolic $(p,q)$-Tilings
Explicit growth rates for billiard word complexity in hyperbolic (p,q)-polygons for even q, plus complete grammar rules for realizable paths using minimal tiling paths.