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Existence and multiplicity results for some weakly nonlinear elliptic problems at resonance. (English) Zbl 0524.35045


MSC:

35J65 Nonlinear boundary value problems for linear elliptic equations
35B30 Dependence of solutions to PDEs on initial and/or boundary data and/or on parameters of PDEs
35A05 General existence and uniqueness theorems (PDE) (MSC2000)