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math.DG2001
On Konopelchenko's representation for surfaces in 4 dimensions
Frederic Helein
The purpose of this short note is to relate a representation formula due to the Author and P. Romon for Lagrangian surfaces (see math.DG/0009202) to a more general Weierstrass repr…
math.DG2001
Problemes variationnels invariants par transformation conforme en dimension 2
Frederic Helein
This text proposes geometrical descriptions of all variational problems invariant by conformal transformations in two variables. First a characterisation in terms of C-Finsler mani…