Abstract
This is a review of some coordinate-free calculi of pseudodifferential operators developed in the last years. As an application, we use a coordinate-free calculus to obtain new results on the behaviour of the spectral projections of a self-adjoint elliptic second order differential operator under perturbation of coefficients.
Original language | English |
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Title of host publication | Partial differential equations and spectral theory |
Publisher | Birkhäuser |
ISBN (Print) | 9783034800235, 3034800231 |
Publication status | Published - Jun 2011 |