On the Density of the Range for Some Superquadratic Operators.
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WISCONSIN UNIV-MADISON MATHEMATICS RESEARCH CENTER
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During the past few years there has been a considerable amount of research on the existence of multiple solution of superlinear differential equations. By superlinear is meant the equations possess a nonlinearity which grows more rapidly than linearly at infinity. This research has been done in the setting of boundary value problems for semilinear elliptic partial differential equations, and preriodicity problems for Hamiltonian systems of ordinary differential equations and semilinear wave equations. Keywords Periodic solutions Operatorsmathematics Nonlinear hyperbolic equations Leray Schauder theorem Ordinary differential equations.
- Numerical Mathematics