P-distances, q-distances and a generalized Ekeland’s variational principle in uniform spaces

On the variational principle

Ivar Ekeland · Journal of Mathematical Analysis and Applications · 1974 · 2.3K citations · Full text

Natural Sciences, Mathematics, Physics +10

APPLIED NONLINEAR ANALYSIS

John Toland · Bulletin of the London Mathematical Society · 1985 · 1.5K citations

Natural Sciences, Mathematics, Dynamical Systems +2

Nonconvex minimization problems

Ivar Ekeland · Bulletin of the American Mathematical Society · 1979 · 1K citations · Full text

Natural Sciences, Mathematics, Cost-minimization Analysis +16

Nonlinear Functional Analysis

Wataru Takahashi · Tokyo Tech Research Repository (Tokyo Institute of Technology) · 2000 · 957 citations

NONCONVEX MINIMIZATION THEOREMS AND FIXED POINT THEOREMS IN COMPLETE METRIC SPACES

Osamu Kada, Tomonari Suzuki, Wataru Takahashi · Mathematica japonica · 1996 · 381 citations

Natural Sciences, Mathematics, Computational Geometry +8