ON LOCAL SMOOTHNESS OF GENERALIZED AND HYPOELLIPTICITY OF SECOND ORDER DIFFERENTIAL EQUATIONS

DOI10.1070/rm1971v026n02ABEH003821zbMath0228.35023OpenAlexW2092562872MaRDI QIDQ5635758

E. V. Radkevich, Olga A. Oleinik

Publication date: 1972

Published in: Russian Mathematical Surveys (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1070/rm1971v026n02abeh003821

Mathematics Subject Classification ID

Hypoelliptic equations (35H10)

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