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zbMATH Open0415.35049MaRDI QIDQ3050851

Victor Ivrii

Publication date: 1979

Title of this publication is not available (Why is that?)

zbMATH Keywords

wave equation wave front propagation of singularities generalized bicharacteristics characteristic manifolds boundary conditions of Dirichlet or Neumann type classical pseudo-differential operator

Mathematics Subject Classification ID

Pseudodifferential operators as generalizations of partial differential operators (35S05) Wave equation (35L05) Analyticity in context of PDEs (35A20)

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