Morse theory and asymptotic linear Hamiltonian system

Periodic solutions of hamiltonian systems

Paul H. Rabinowitz · Communications on Pure and Applied Mathematics · 1978 · 735 citations

Natural Sciences, Mathematics, Physics +13

Critical point theorems for indefinite functionals

Vieri Benci, Paul H. Rabinowitz · Inventiones mathematicae · 1979 · 428 citations

Natural Sciences, Materials Science, Critical Theory +7

Nontrivial solutions for a class of nonresonance problems and applications to nonlinear differential equations

Herbert Amann, Edward J. Zehnder · French digital mathematics library (Numdam) · 1980 · 314 citations

Natural Sciences, Mathematics, Computational Electromagnetics +13

Solutions of asymptotically linear operator equations via morse theory

Kung Ching Chang · Communications on Pure and Applied Mathematics · 1981 · 196 citations

Natural Sciences, Mathematics, Differential Equations +12

Periodic solutions of asymptotically linear Hamiltonian systems

Herbert Amann, Eduard Zehnder · manuscripta mathematica · 1980 · 140 citations

Natural Sciences, Mathematics, Physics +11