scientific article
zbMATH Open0539.35060MaRDI QIDQ3326131
Publication date: 1983
Title of this publication is not available (Why is that?)
bicharacteristicseigenvalue distribution functionh-pseudo-differential operatorquasiclassical asymptoticsfrequency front set
Pseudodifferential operators as generalizations of partial differential operators (35S05) Spectral problems; spectral geometry; scattering theory on manifolds (58J50) Asymptotic distributions of eigenvalues in context of PDEs (35P20) Hyperbolic equations on manifolds (58J45) Propagation of singularities; initial value problems on manifolds (58J47)
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