Mathematics – Differential Geometry
Scientific paper
2003-04-03
GAFA 15 (2005), 567-576
Mathematics
Differential Geometry
A term is missing in Version 2 and the printed version. The term is added in Version 3
Scientific paper
Let $(M,g)$ be a compact connected spin manifold of dimension $n\geq 3$ whose Yamabe invariant is positive. We assume that $(M,g)$ is locally conformally flat or that $n \in \{3,4,5\}$. According to a positive mass theorem of Witten, the constant term in the asymptotic development of the Green's function of the conformal Laplacian is positive if $(M,g)$ is not conformally equivalent to the sphere. In the present article, we will give a proof for this fact which is considerably shorter than previous proofs. Our proof is a modification of Witten's argument, but no analysis on asymtotically flat spaces is needed.
Ammann Bernd
Humbert Emmanuel
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