Geodesic
Cohomology of Symplectomorphism Groups and Critical Values of Hamiltonians.
Mathematische Zeitschrift, Tome 201 (1989) no. 4, pp. 75-82.

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Mots-clés : loops in the automorphism group of a compact, simply-connected, symplectic manifold, integrals of the symplectic form over integer homology classes, average action integral, Hamilton's principle of stationary action, critical value of the hamiltonian 
@article{MZ_1989__201_4_174036,
     author = {Alan Weinstein},
     title = {Cohomology of {Symplectomorphism} {Groups} and {Critical} {Values} of {Hamiltonians.}},
     journal = {Mathematische Zeitschrift},
     pages = {75--82},
     publisher = {mathdoc},
     volume = {201},
     number = {4},
     year = {1989},
     zbl = {0644.57024},
     url = {http://geodesic.mathdoc.fr/item/MZ_1989__201_4_174036/}
}
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Alan Weinstein. Cohomology of Symplectomorphism Groups and Critical Values of Hamiltonians.. Mathematische Zeitschrift, Tome 201 (1989) no. 4, pp. 75-82. http://geodesic.mathdoc.fr/item/MZ_1989__201_4_174036/