On the Existence of Global Variational Principles

Solution of the inverse problem of the calculus of variations

Jesse Douglas · Transactions of the American Mathematical Society · 1941 · 304 citations · Full text

Inverse Problem, Engineering, Variational Analysis +12

A global version of the inverse problem of the calculus of variations

Floris Takens · Journal of Differential Geometry · 1979 · 192 citations · Full text

Inverse Problem, Variational Analysis, Global Version +6

A bifurcation theorem for potential operators

Paul H. Rabinowitz · Journal of Functional Analysis · 1977 · 125 citations

Resolvent Kernel, Bifurcation Theory, Functional Analysis +2

The uniqueness of the Einstein field equations in a four-dimensional space

David Lovelock · Archive for Rational Mechanics and Analysis · 1969 · 96 citations

General Relativity, Geometric Partial Differential Equation, Einstein Field Equations +2

Variational Formulations of Nonlinear Differential Equations, (II part)

Enzo Tonti · ArTS Archivio della ricerca di Trieste (University of Trieste https://www.units.it/) · 1969 · 38 citations

Nonlinear Functional Analysis, Calculus Of Variation, Variational Analysis +1