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Counting closed geodesics in a compact rank-one locally CAT(0) space. (English) Zbl 1490.37045

Summary: Let \(X\) be a compact, geodesically complete, locally CAT(0) space such that the universal cover admits a rank-one axis. Assume \(X\) is not homothetic to a metric graph with integer edge lengths. Let \(P_t\) be the number of parallel classes of oriented closed geodesics of length at most \(t\); then \(\lim \nolimits_{t \to \infty} P_t / ({e^{ht}}/{ht}) = 1\), where \(h\) is the entropy of the geodesic flow on the space \(GX\) of parametrized unit-speed geodesics in \(X\).

MSC:

37D40 Dynamical systems of geometric origin and hyperbolicity (geodesic and horocycle flows, etc.)
53C22 Geodesics in global differential geometry
28D20 Entropy and other invariants

References:

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