Geodesic
The diameter of the symplectomorphism group is infinite.
Inventiones mathematicae, Tome 103 (1991) no. 1, pp. 327-340.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Mots-clés : groups of diffeomorphisms, volume-preserving diffeomorphisms, symplectic diffeomorphisms, Riemannian manifold 
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     author = {Tudor Ratiu and Yakov Eliashberg},
     title = {The diameter of the symplectomorphism group is infinite.},
     journal = {Inventiones mathematicae},
     pages = {327--340},
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     volume = {103},
     number = {1},
     year = {1991},
     zbl = {0725.58006},
     url = {http://geodesic.mathdoc.fr/item/IM_1991__103_1_143860/}
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Tudor Ratiu; Yakov Eliashberg. The diameter of the symplectomorphism group is infinite.. Inventiones mathematicae, Tome 103 (1991) no. 1, pp. 327-340. http://geodesic.mathdoc.fr/item/IM_1991__103_1_143860/