The Nehari manifold for systems of nonlinear elliptic equations

On the variational principle

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Progress in Nonlinear Differential Equations and their Applications

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Combined Effects of Concave and Convex Nonlinearities in Some Elliptic Problems

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Monge-ampere Equation, Elliptic Equation, Convex Nonlinearities +6

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The Nehari manifold for a semilinear elliptic equation with a sign-changing weight function

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Monge-ampere Equation, Elliptic Equation, Semilinear Elliptic Equation +5