A Fefferman–Phong Type Inequality and Applications to Quasilinear Subelliptic Equations

Hypoelliptic second order differential equations

Lars Hörmander · Acta Mathematica · 1967 · 2.4K citations · Full text

Natural Sciences, Mathematics, Differential Equations +5

Hypoelliptic differential operators and nilpotent groups

Linda Preiss Rothschild, E. M. Stein · Acta Mathematica · 1976 · 1.1K citations · Full text

Natural Sciences, Mathematics, Differential Equations +7

Some Maximal Inequalities

Charles Fefferman, E. M. Stein · American Journal of Mathematics · 1971 · 1K citations

Local behavior of solutions of quasi-linear equations

James Serrin · Acta Mathematica · 1964 · 1K citations · Full text

Natural Sciences, Mathematics, Differential Equations +11

Balls and metrics defined by vector fields I: Basic properties

Alexander Nagel, Elias M. Stein, Stephen Wainger · Acta Mathematica · 1985 · 886 citations · Full text

Natural Sciences, Mathematics, Geometry +11