An overview of the lower and upper solutions method with nonlinear boundary value conditions.
Cabada, Alberto (2011)
Boundary Value Problems [electronic only]
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Cabada, Alberto (2011)
Boundary Value Problems [electronic only]
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Gunther Uhlmann (2012-2013)
Séminaire Laurent Schwartz — EDP et applications
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In this article we survey some of the most important developments since the 1980 paper of A.P. Calderón in which he proposed the problem of determining the conductivity of a medium by making voltage and current measurements at the boundary.
Kwong, Man Kam, Wong, James S.W. (2007)
Boundary Value Problems [electronic only]
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Ludger Brüll, Jean Mawhin (1988)
Archivum Mathematicum
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David Krejčiřík (2008)
ESAIM: Control, Optimisation and Calculus of Variations
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We consider the Laplacian in a domain squeezed between two parallel curves in the plane, subject to Dirichlet boundary conditions on one of the curves and Neumann boundary conditions on the other. We derive two-term asymptotics for eigenvalues in the limit when the distance between the curves tends to zero. The asymptotics are uniform and local in the sense that the coefficients depend only on the extremal points where the ratio of the curvature radii of the Neumann boundary to the...
J. B. Díaz, R. B. Ram (1979)
Collectanea Mathematica
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Zhai, Chengbo, Song, Ruipeng (2010)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
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Jifeng Chu, Daqing Jiang, Donal O'Regan, R. P. Agarwal (2005)
Applicationes Mathematicae
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We study the existence of positive solutions to second order nonlinear differential equations with Neumann boundary conditions. The proof relies on a fixed point theorem in cones, and the positivity of Green's function plays a crucial role in our study.