Geodesic
Fundamental group of $\operatorname{Symp}(M,\omega )$ with no circle action
Archivum mathematicum, Tome 45 (2009) no. 1, pp. 75-78.

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

We show that $\pi _1(\operatorname{Symp}(M, \omega ))$ can be nontrivial for $M$ that does not admit any symplectic circle action.
Classification : 53C15, 53D35, 57S05
Keywords: symplectomorphism; circle action 
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     author = {K\k{e}dra, Jarek},
     title = {Fundamental group of $\operatorname{Symp}(M,\omega )$ with no circle action},
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     zbl = {1212.57016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2009__45_1_a6/}
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Kędra, Jarek. Fundamental group of $\operatorname{Symp}(M,\omega )$ with no circle action. Archivum mathematicum, Tome 45 (2009) no. 1, pp. 75-78. http://geodesic.mathdoc.fr/item/ARM_2009__45_1_a6/