On boundary value problems for Einstein metrics

Details On boundary value problems for Einstein metrics On boundary value problems for Einstein metrics

2006-12-21

arxiv.org/abs/math/0612647v4

Mathematics

Differential Geometry

23pp, significant corrections

Scientific paper

On any given compact (n+1)-manifold M with non-empty boundary, it is proved that the moduli space of Einstein metrics on M is a smooth, infinite dimensional Banach manifold under a mild condition on the fundamental group. Thus, the Einstein moduli space is unobstructed. The Dirichlet and Neumann boundary maps to data on the boundary are smooth, but not Fredholm. Instead, one has natural mixed boundary-value problems which give Fredholm boundary maps. These results also hold for manifolds with compact boundary which have a finite number of locally asymptotically flat ends, as well as for the Einstein equations coupled to many other fields.

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