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math.GR2014
The large scale geometry of strongly aperiodic subshifts of finite type
David Bruce Cohen
A subshift on a group G is a closed, G-invariant subset of A^G, for some finite set A. It is said to be a subshift of finite type (SFT) if it is defined by a finite collection of '…
math.GR2014★ 2 cited
The Dehn function of Sp(2n;Z)
David Bruce Cohen
Gromov conjectured that any irreducible lattice in a symmetric space of rank at least 3 should have at most polynomial Dehn function. We prove that the lattice Sp(2p;Z) has quadrat…