Unsolvable Hypoelliptic Differential Operators with a Totally Characteristic Point
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Publication:3689539
DOI10.1002/MANA.19831140110zbMath0572.35023OpenAlexW2159852155MaRDI QIDQ3689539
Publication date: 1983
Published in: Mathematische Nachrichten (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1002/mana.19831140110
surjectivityhypoellipticityselfadjointtotally characteristic pointpositive principal symbolnot local solvability
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