Hypoelliptic pseudo-differential operators of fourth order with non- involutive characteristic set

zbMath0725.35037MaRDI QIDQ2276662

Nguyen Minh Tri

Publication date: 1990

Published in: Moscow University Mathematics Bulletin (Search for Journal in Brave)

zbMATH Keywords

hypoelliptic pseudodifferential operatorsreal symbolsnoninvolutive characteristic set

Mathematics Subject Classification ID

Pseudodifferential operators as generalizations of partial differential operators (35S05) Geometric theory, characteristics, transformations in context of PDEs (35A30) Hypoelliptic equations (35H10)

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