ar X iv : m at h . SG / 0 40 44 96 v 2 1 3 Ju l 2 00 4 Symplectomorphism groups and isotropic skeletons
نویسنده
چکیده
The symplectomorphism group of a 2-dimensional surface S is homotopy equivalent to the orbit of a filling system of curves on S. We give a generalization of this statement to dimension 4. The filling system of curves is replaced by a decomposition of M into a disjoint union of an isotropic 2-complex L and a disc bundle over a symplectic surface Σ Poincare dual to a multiple of the form. We show that one can recover the homotopy type of the symplectomorphism group of M from the orbit of the pair (L,Σ). This allows us to compute the homotopy type of certain spaces of Lagrangian submanifolds, for example the space of Lagrangian RP2 ⊂CP2 isotopic to the standard one.
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تاریخ انتشار 2004