Hypoellipticity for a class of degenerate elliptic operators of second order
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Publication:1202803
DOI10.21099/TKBJM/1496161842zbMath0804.35026OpenAlexW2265814623MaRDI QIDQ1202803
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Publication date: 22 February 1993
Published in: (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.21099/tkbjm/1496161842
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