Ambrosetti, Antonio; Mancini, Giovanni Existence and multiplicity results for nonlinear elliptic problems with linear part at resonance. The case of the simple eigenvalue. (English) Zbl 0393.35032 J. Differ. Equations 28, 220-245 (1978). MSC: 35J65 35P30 PDFBibTeX XMLCite \textit{A. Ambrosetti} and \textit{G. Mancini}, J. Differ. Equations 28, 220--245 (1978; Zbl 0393.35032) Full Text: DOI
Ambrosetti, Antonio; Mancini, Giovanni Theorems of existence and multiplicity for nonlinear elliptic problems with noninvertible linear part. (English) Zbl 0375.35024 Ann. Sc. Norm. Super. Pisa, Cl. Sci., IV. Ser. 5, 15-28 (1978). MSC: 35J60 47J05 35A05 35P05 PDFBibTeX XMLCite \textit{A. Ambrosetti} and \textit{G. Mancini}, Ann. Sc. Norm. Super. Pisa, Cl. Sci., IV. Ser. 5, 15--28 (1978; Zbl 0375.35024) Full Text: Numdam EuDML