Hypoellipticity of second order operators in ${\bf R}\sp 2$ of the form $fX\sp 2+Y+g$
Akamatsu, Toyohiro
Osaka J. Math., Tome 33 (1996) no. 1, p. 607-628 / Harvested from Project Euclid
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Publié le : 1996-05-15
Classification:  35H05,  35K65 
@article{1200787091,
     author = {Akamatsu, Toyohiro},
     title = {Hypoellipticity of second order operators in ${\bf R}\sp 2$ of the form $fX\sp 2+Y+g$},
     journal = {Osaka J. Math.},
     volume = {33},
     number = {1},
     year = {1996},
     pages = { 607-628},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1200787091}
}

Akamatsu, Toyohiro. Hypoellipticity of second order operators in ${\bf R}\sp 2$ of the form $fX\sp 2+Y+g$. Osaka J. Math., Tome 33 (1996) no. 1, pp.  607-628. http://gdmltest.u-ga.fr/item/1200787091/