On Harnack's theorem for elliptic differential equations

Continuity of Solutions of Parabolic and Elliptic Equations

John C. Nash · American Journal of Mathematics · 1958 · 1.2K citations

Elliptic Equation, Elliptic Equations, Nonlinear Hyperbolic Problem +1

A new proof of de Giorgi's theorem concerning the regularity problem for elliptic differential equations

Jürgen Moser · Communications on Pure and Applied Mathematics · 1960 · 780 citations

Monge-ampere Equation, Elliptic Equation, Regularity Problem +4

On isolated singularities of solutions of second order elliptic differential equations

David Gilbarg, James Serrin · Journal d Analyse Mathématique · 1954 · 180 citations

Elliptic Equation, Isolated Singularities, Elliptic Function

On the Harnack inequality for linear elliptic equations

James Serrin · Journal d Analyse Mathématique · 1954 · 91 citations

Elliptic Equation, Variational Inequality, Functional Analysis +2