Les applications conforme-harmoniques

Details Les applications conforme-harmoniques Les applications conforme-harmoniques

2012-03-25

arxiv.org/abs/1203.5512v1

Mathematics

Differential Geometry

Scientific paper

On a Riemannian surface, the energy of a map into a Riemannian manifold is a conformal invariant functional, and its critical points are the harmonic maps. Our main result is a generalization of this theorem when the starting manifold is even dimensional. We then build a conformal invariant functional for the maps between two Riemannian manifolds. Its critical points then called C--harmonic are the solutions of a nonlinear elliptic PDE of order $n$, which is conformal covariant with respect to the start manifold. For the trivial case of real or complex functions of $M$, we find again the GJMS operator, with a leading part power to the $n/2$ of the Laplacian. When $n$ is odd, we prove that the constant term of the asymptotic expansion of the energy of an asymptotically harmonic map on an AHE manifold $(M^{n+1},g_+)$ is an absolute invariant of $g_+$.

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