Lagrangian Intersections and the Serre Spectral Sequence

Details Lagrangian Intersections and the Serre Spectral Sequence Lagrangian Intersections and the Serre Spectral Sequence

2004-01-09

arxiv.org/abs/math/0401094v2

Mathematics

Differential Geometry

55 pages. LaTeX. fixed some imprecisions in the appendix

Scientific paper

For a transversal pair of closed Lagrangian submanifolds L, L' of a symplectic manifold M so that $\pi_{1}(L)=\pi_{1}(L')=0=c_{1}|_{\pi_{2}(M)}=\omega|_{\pi_{2}(M)}$ and a generic almost complex structure J we construct an invariant with a high homotopical content which consists in the pages of order $\geq 2$ of a spectral sequence whose differentials provide an algebraic measure of the high-dimensional moduli spaces of pseudo-holomorpic strips of finite energy that join L and L'. When L and L' are hamiltonian isotopic, these pages coincide (up to a horizontal translation) with the terms of the Serre-spectral sequence of the path-loop fibration $\Omega L\to PL\to L$. Among other applications we prove that, in this case, each point $x\in L\backslash L'$ belongs to some pseudo-holomorpic strip of symplectic area less than the Hofer distance between L and L'.

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