Bergamasco, Adalberto P.; Cordaro, Paulo D.; Petronilho, Gerson Global solvability for a class of complex vector fields on the two-torus. (English) Zbl 1065.35088 Commun. Partial Differ. Equations 29, No. 5-6, 785-819 (2004). MSC: 35F05 35A05 PDF BibTeX XML Cite \textit{A. P. Bergamasco} et al., Commun. Partial Differ. Equations 29, No. 5--6, 785--819 (2004; Zbl 1065.35088) Full Text: DOI
Bergamasco, Adalberto P.; Petronilho, Gerson Global solvability of a class of involutive systems. (English) Zbl 0942.35011 J. Math. Anal. Appl. 233, No. 1, 314-327 (1999). Reviewer: Th.M.Rassias (Athens) MSC: 35A30 PDF BibTeX XML Cite \textit{A. P. Bergamasco} and \textit{G. Petronilho}, J. Math. Anal. Appl. 233, No. 1, 314--327 (1999; Zbl 0942.35011) Full Text: DOI
Bergamasco, Adalberto P.; Petronilho, Gerson Closedness of the range for vector fields on the torus. (English) Zbl 0926.35030 J. Differ. Equations 154, No. 1, 132-139 (1999). Reviewer: Messoud Efendiev (Berlin) MSC: 35F05 47F05 47A05 37N99 PDF BibTeX XML Cite \textit{A. P. Bergamasco} and \textit{G. Petronilho}, J. Differ. Equations 154, No. 1, 132--139 (1999; Zbl 0926.35030) Full Text: DOI
Bergamasco, Adalberto P.; Cordaro, Paulo D.; Petronilho, Gerson Global solvability for certain classes of underdetermined systems of vector fields. (English) Zbl 0863.58062 Math. Z. 223, No. 2, 261-274 (1996). Reviewer: A.P.Bergamasco (São Carlos) MSC: 58J10 35N10 35A05 PDF BibTeX XML Cite \textit{A. P. Bergamasco} et al., Math. Z. 223, No. 2, 261--274 (1996; Zbl 0863.58062) Full Text: DOI EuDML
Bergamasco, Adalberto P.; Petronilho, Gerson Re-establishment of uniqueness. II. (English) Zbl 0846.35030 J. Differ. Equations 110, No. 1, 134-142 (1994). MSC: 35G10 35A10 PDF BibTeX XML Cite \textit{A. P. Bergamasco} and \textit{G. Petronilho}, J. Differ. Equations 110, No. 1, 134--142 (1994; Zbl 0846.35030) Full Text: DOI
Bergamasco, Adalberto P.; Petronilho, Gerson A construction of parametrices of elliptic boundary value problems. (English) Zbl 0826.35032 Port. Math. 50, No. 3, 263-276 (1993). Reviewer: R.Kodnár (Bratislava) MSC: 35J40 35D10 35S15 PDF BibTeX XML Cite \textit{A. P. Bergamasco} and \textit{G. Petronilho}, Port. Math. 50, No. 3, 263--276 (1993; Zbl 0826.35032) Full Text: EuDML
Bergamasco, Adalberto P.; Petronilho, Gerson Re-establishment of uniqueness. I. (English) Zbl 0798.47035 J. Math. Anal. Appl. 178, No. 2, 309-321 (1993). MSC: 47F05 35A05 PDF BibTeX XML Cite \textit{A. P. Bergamasco} and \textit{G. Petronilho}, J. Math. Anal. Appl. 178, No. 2, 309--321 (1993; Zbl 0798.47035) Full Text: DOI
Bergamasco, Adalberto P.; Petronilho, Gerson On the hypoellipticity of degenerate elliptic boundary value problems. (English) Zbl 0767.35114 J. Math. Anal. Appl. 171, No. 2, 407-417 (1992). Reviewer: V.S.Rabinovich (Rostov-na-Donu) MSC: 35S05 35J70 65H10 PDF BibTeX XML Cite \textit{A. P. Bergamasco} and \textit{G. Petronilho}, J. Math. Anal. Appl. 171, No. 2, 407--417 (1992; Zbl 0767.35114) Full Text: DOI
Bergamasco, Adalberto P.; Gerszonowicz, Jorge A.; Petronilho, Gerson On the regularity up to the boundary in the Dirichlet problem for degenerate elliptic equations. (English) Zbl 0681.35021 Trans. Am. Math. Soc. 313, No. 1, 317-329 (1989). Reviewer: M.Langlais MSC: 35D10 35J70 35J25 35S99 PDF BibTeX XML Cite \textit{A. P. Bergamasco} et al., Trans. Am. Math. Soc. 313, No. 1, 317--329 (1989; Zbl 0681.35021) Full Text: DOI