Bergamasco, Adalberto P. Remarks about global analytic hypoellipticity. (English) Zbl 0932.35046 Trans. Am. Math. Soc. 351, No. 10, 4113-4126 (1999). Reviewer: P.Popivanov (Sofia) MSC: 35H10 PDF BibTeX XML Cite \textit{A. P. Bergamasco}, Trans. Am. Math. Soc. 351, No. 10, 4113--4126 (1999; Zbl 0932.35046) Full Text: DOI
Bergamasco, Adalberto P. Perturbations of globally hypoelliptic operators. (English) Zbl 0815.35009 J. Differ. Equations 114, No. 2, 513-526 (1994). Reviewer: H.Siedentop (Oslo) MSC: 35H10 35B20 PDF BibTeX XML Cite \textit{A. P. Bergamasco}, J. Differ. Equations 114, No. 2, 513--526 (1994; Zbl 0815.35009) Full Text: DOI
Bergamasco, Adalberto P. Uniqueness in a characteristic Cauchy problem with variable multiplicity. (English) Zbl 0791.35021 J. Math. Anal. Appl. 182, No. 1, 23-33 (1994). MSC: 35G10 35A05 PDF BibTeX XML Cite \textit{A. P. Bergamasco}, J. Math. Anal. Appl. 182, No. 1, 23--33 (1994; Zbl 0791.35021) Full Text: DOI