Invariant Euler–Lagrange Equations and the Invariant Variational Bicomplex

Applications of lie groups to differential equations

Acta Applicandae Mathematicae · 1990 · 6.1K citations

Natural Sciences, Mathematics, Physics +14

Equivalence, invariants, and symmetry

Choice Reviews Online · 1996 · 862 citations

Natural Sciences, Mathematics, Physics +17

THE HAMILTON-JACOBI THEORY IN THE CALCULUS OF VARIATIONS

C. W. Kilmister · Journal of the London Mathematical Society · 1967 · 499 citations

Natural Sciences, Mathematics, Physics +9

A duality theorem for Willmore surfaces

Robert L. Bryant · Journal of Differential Geometry · 1984 · 392 citations · Full text

Natural Sciences, Mathematics, Geometry +7

Moving Coframes: II. Regularization and Theoretical Foundations

Mark E. Fels, Peter J. Olver · Acta Applicandae Mathematicae · 1999 · 360 citations

Natural Sciences, Mathematics, Dynamical Systems +4