The near-boundary geometry of Einstein-vacuum asymptotically Anti-de Sitter spacetimes

We study the geometry of a general class of vacuum asymptotically Anti-de Sitter spacetimes near the conformal boundary. In particular, the spacetime is only assumed to have finite regularity, and it is allowed to have arbitrary boundary topology and geometry. For the main results, we derive limits at the conformal boundary of various geometric quantities, and we use these limits to construct partial Fefferman-Graham expansions from the boundary. The results of this article will be applied, in upcoming papers, toward proving symmetry extension and gravity-boundary correspondence theorems for vacuum asymptotically Anti-de Sitter spacetimes