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On the symbols of degenerate elliptic differential and hypoelliptic pseudodifferential operators
S. Z. Levendorskii
Abstract:
The author presents a general method of reducing the study of various degenerate operators to that of model operators with quasihomogeneous symbols whose hypoellipticity conditions are formulated in terms of an auxiliary operator-valued symbol. A set of symbols is constructed whose invertibility implies hypoellipticity.
Bibliography: 13 titles.
Received: 18.02.1986
Citation:
S. Z. Levendorskii, “On the symbols of degenerate elliptic differential and hypoelliptic pseudodifferential operators”, Math. USSR-Izv., 32:3 (1989), 543–561
Linking options:
https://www.mathnet.ru/eng/im1193https://doi.org/10.1070/IM1989v032n03ABEH000780 https://www.mathnet.ru/eng/im/v52/i3/p541
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