By means of a Picone's type identity, we prove uniqueness and oscillation of solutions to an elliptic semilinear equation with Dirichlet boundary conditions.
Submitted November 14, 2008. Published May 14, 2009.
Math Subject Classifications: 35J60, 35J70.
Key Words: Picone's identity; semilinear elliptic equations
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Mathematics Institut, Universitetsparken 5
2100 Copenhagen, Denmark
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