On montre qu’une 2-forme non nulle sur une variété , telle que le pseudogroupe des difféomorphismes locaux la préservant soit transitif sur le fibré des directions tangentes, est symplectique si la dimension de n’est pas . De plus, il y a un contre-exemple en dimension 6, dont on montre qu’il est essentiellement unique.
It is shown that a nonzero 2-form on a manifold , such that the pseudogroup of local diffeomorphisms preserving it acts transitively on the bundle of tangent directions, is symplectic if is not . Moreover, there is a counterexample in dimensions, which is shown to be essentially unique.
@article{AIF_1998__48_1_265_0, author = {S\'evennec, Bruno}, title = {Une caract\'erisation des formes symplectiques}, journal = {Annales de l'Institut Fourier}, volume = {48}, year = {1998}, pages = {265-280}, doi = {10.5802/aif.1618}, mrnumber = {99b:53047}, zbl = {0943.53047}, language = {fr}, url = {http://dml.mathdoc.fr/item/AIF_1998__48_1_265_0} }
Sévennec, Bruno. Une caractérisation des formes symplectiques. Annales de l'Institut Fourier, Tome 48 (1998) pp. 265-280. doi : 10.5802/aif.1618. http://gdmltest.u-ga.fr/item/AIF_1998__48_1_265_0/
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