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We consider the sl(2)-module structure on the spaces of symbols ofdifferential opera- tors acting on the spaces of weighted densities. We computethe necessary and sufficient integrability conditions of a given infinitesimaldeformation of this structure and we prove that any formal deformation isequivalent to its infinitesimal part. We study also the super analogue of thisproblem getting the same results.

Deformation of sl(2) and osp(1|2)-Modules of Symbols