Semiclassical hypoelliptic estimates for non-selfadjoint operators with double characteristics

Details Semiclassical hypoelliptic estimates for non-selfadjoint operators with double characteristics Semiclassical hypoelliptic estimates for non-selfadjoint operators with double characteristics

2009-02-20

arxiv.org/abs/0902.3491v1

Mathematics

Analysis of PDEs

Scientific paper

For a class of non-selfadjoint semiclassical pseudodifferential operators with double characteristics, we study bounds for resolvents and estimates for low lying eigenvalues. Specifically, assuming that the quadratic approximations of the principal symbol of the operator along the double characteristics enjoy a partial ellipticity property along a suitable subspace of the phase space, namely their singular space, we establish semiclassical hypoelliptic a priori estimates with a loss of the full power of the semiclassical parameter, giving a localization for the low lying spectral values of the operator.

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