Geodesic
Trajectory theory
Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya, Itogi Nauki i Tekhniki. Seriya "Sovremennye Problemy Matematiki. Noveishie Dostizheniya", Tome 26 (1985), pp. 171-211 
A. M. Vershik; A. L. Fëdorov. Trajectory theory. Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya, Itogi Nauki i Tekhniki. Seriya "Sovremennye Problemy Matematiki. Noveishie Dostizheniya", Tome 26 (1985), pp. 171-211. http://geodesic.mathdoc.fr/item/INTD_1985_26_a4/
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     author = {A. M. Vershik and A. L. F\"edorov},
     title = {Trajectory theory},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya},
     pages = {171--211},
     year = {1985},
     volume = {26},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTD_1985_26_a4/}
}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

This survey is devoted to metric trajectory theory, considering groups of transformations with an invariant or quasiinvariant measure.