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zbMath0555.35019MaRDI QIDQ3218461

Peter R. Popivanov

Publication date: 1983

Full work available at URL: https://eudml.org/doc/208502

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

hypoellipticity double characteristics pseudo-differential system diagonal principal symbol

Mathematics Subject Classification ID

Pseudodifferential operators as generalizations of partial differential operators (35S05) Hypoelliptic equations (35H10)

Related Items (1)

Lower bounds for systems with double characteristics.

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