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Density of systoles of hyperbolic manifolds

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We show that for each n ≥ 2 , the systoles of closed hyperbolic n -manifolds form a dense subset of ( 0 , + ∞ ) . We also show that for any n ≥ 2 and any Salem number λ , there is a closed arithmetic hyperbolic n -manifold of systole log ( λ ) . In particular, the Salem conjecture holds if and only if the systoles of closed arithmetic hyperbolic manifolds in some (any) dimension fail to be dense in ( 0 , + ∞ ) .
Title: Density of systoles of hyperbolic manifolds
Description:
We show that for each n ≥ 2 , the systoles of closed hyperbolic n -manifolds form a dense subset of ( 0 , + ∞ ) .
We also show that for any n ≥ 2 and any Salem number λ , there is a closed arithmetic hyperbolic n -manifold of systole log ( λ ) .
In particular, the Salem conjecture holds if and only if the systoles of closed arithmetic hyperbolic manifolds in some (any) dimension fail to be dense in ( 0 , + ∞ ) .

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