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I will describe joint work with Thomas Kragh proving that closed exact Lagrangians in cotangent bundles are simply homotopy equivalent to the base. The main two ideas are (i) a Floer theoretic model for the Whitehead torsion of the projection from the Lagrangian to the base, and (ii) a large scale deformation of the Lagrangian which allows a computation of this torsion.

53D40 ; 55P35 ; 55P42

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lder=162'> Hommage à Claude Shannon
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    Documents  Abouzaid, Mohammed | enregistrements trouvés : 1

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