Chen, Zu-ChiXuan, Benjin2020-08-182020-08-182002-10-10Chen, Z. C., & Xuan, B. J. (2002). On the Keldys-Fichera boundary-value problem for degenerate quasilinear elliptic equations. <i>Electronic Journal of Differential Equations, 2002</i>(87), pp. 1-13.1072-6691https://hdl.handle.net/10877/12420We prove existence and uniqueness theorems for the Keldys-Fichera boundary-value problem using pseudo-monotone operators. The equation studied here is quasilinear, elliptic, and its set of degenerate points may be of non-zero measure. We also obtain comparison and maximum principles for this problem.Text13 pages1 file (.pdf)enAttribution 4.0 InternationalKeldys-FicheraExistenceUniquenessMaximum principleComparison principleArticle