Abstract
This is a brief summary of a paper to appear, where I developed some tools in order to study the Weinstein conjecture [1]. This conjecture states that any contact vector-field on a compact contact manifold (M2n−1, α) has a periodic orbit, provided H1(M2n−1, Z) = 0. This conjecture has been seen to hold in case M2n−1 may be embedded in R 2n, with an embedding i such that i*ω) = dα, where ω is the standard symplectic form in R 2n. The proof in the R 2n-case, after the results of Birkhoff and Seifert, starts with the work of Paul H. Rabinowitz and A. Weinstein, who studied the case where M is a starshaped or convex hypersurface in R 2n. Recently, C. Viterbo proved the conjecture under the general assumption i* ω = dα. There is, at this precise moment, a gap between the full conjecture and the known results; hopefully, it will be filled soon.
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References
A. Weinstein, ‘On the hypotheses of Rabinowitz’ periodic orbit theorems’, J. Diff. Equ. 33 (1979), 353–358.
A. Bahri, ‘Pseudo-orbits of contact forms’, to appear.
S. Smale, ‚Regular curves on Riemannian manifolds‘, Trans. Amer. Math. Soc. 87 (1958), 492–512.
D. Bennequin, ‚Quelques remarques sur la rigidit‘ symplectique’, Seminaire Sud-Rhodanian de Geometrie III. Geometrie symplectique et de contact, 1–150.
A. Bahri, ‚Un probleme variationnel sans compacité en geometrie de contact‘, Comptes. Rendus de l’Académie des Sciences Paris, t299, Serie I, no. 15 (1984).
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© 1987 D. Reidel Publishing Company
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Bahri, A. (1987). Pseudo-Orbits of Contact Forms. In: Rabinowitz, P.H., Ambrosetti, A., Ekeland, I., Zehnder, E.J. (eds) Periodic Solutions of Hamiltonian Systems and Related Topics. NATO ASI Series, vol 209. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3933-2_2
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DOI: https://doi.org/10.1007/978-94-009-3933-2_2
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