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Un résultat de non-existence de solution positive pour une équation elliptique. (A nonexistence result for positive solutions of an elliptic equation). (French) Zbl 0719.35028

The paper deals with the equation \(-\Delta u(x)=f(u(x))=\lambda g(x)\) in a bounded n-dimensional domain with Dirichlet boundary conditions under suitable restrictions for f and g. The author proves that for \(\lambda\) large enough the above problem has no positive solutions. To prove this result variational methods are used.

MSC:

35J65 Nonlinear boundary value problems for linear elliptic equations
35P30 Nonlinear eigenvalue problems and nonlinear spectral theory for PDEs
35J20 Variational methods for second-order elliptic equations

References:

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[3] McLeod, K.; Serrin, J., Uniqueness of Positive Radial Solution of Δ \(u + f(u) = 0\) in \(ℝ^n\), Arch. Rat. Mech. Anal., vol. 99, 115-146 (1987) · Zbl 0667.35023
[5] Ramaswamy, M., On the Global Set of Solutions to a Nonlinear ODE-Theoretical and Numerical Description, J. Diff. Eq., vol. 65, 1-48 (1986) · Zbl 0597.34014
[7] Smoller, J.; Wasserman, Α., Existence Uniqueness and Nondegeneracy of Positive Solutions of Semilinear Elliptic Equations, Comm. Math. Phys., vol. 95, 129-159 (1984) · Zbl 0582.35046
[8] Serrin, J., A Symmetry Problem in Potential Theory, Arch. Rat. Mech. Anal., vol. 43, 304-318 (1971) · Zbl 0222.31007
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