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Singularités lagrangiennes

Abstract : This thesis develops a deformation theory for lagrangian
singularities. We define four each lagrangian singularity
a complex of modules with a non-linear differential whose
first cohomology is isomorphic to the space of infinitesimal
deformations of the singularity. The second cohmology contains
informations on the obstruction theory. This complex is related
to the theory of differential modules. We show that
under a geometric condition, its cohomology forms constructible
sheaves. We describe a method using computer algebra to determine
this cohomology for quasi-homogeneous surfaces.
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Contributor : Christian Sevenheck <>
Submitted on : Sunday, November 23, 2003 - 7:19:38 PM
Last modification on : Wednesday, March 27, 2019 - 4:10:22 PM
Long-term archiving on: : Wednesday, September 12, 2012 - 11:45:09 AM


  • HAL Id : tel-00003816, version 1



Christian Sevenheck. Singularités lagrangiennes. Mathematics [math]. Ecole Polytechnique X, 2003. English. ⟨tel-00003816⟩