Geodesic
A new curvature invariant and entropy of geodesic flow.
Inventiones mathematicae, Tome 77 (1984), pp. 455-462

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Mots-clés : locally symmetric space, unit tangent bundle, entropy, geodesic flow, sectional curvature, curvature invariant 
@article{IM_1984__77_143155,
     author = {P. Sarnak and R. Osserman},
     title = {A new curvature invariant and entropy of geodesic flow.},
     journal = {Inventiones mathematicae},
     pages = {455--462},
     publisher = {mathdoc},
     volume = {77},
     year = {1984},
     zbl = {0536.53048},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__77_143155/}
}
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P. Sarnak; R. Osserman. A new curvature invariant and entropy of geodesic flow.. Inventiones mathematicae, Tome 77 (1984), pp. 455-462. http://geodesic.mathdoc.fr/item/IM_1984__77_143155/