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5 votes

Is the conformal compactification of $M \setminus \{ p \}$ unique?

Theorem 1.4 in C. Frances' preprint "Rigidity at the boundary for conformal structures and other Cartan geometries" asserts that the geodesic compactification is unique (up to conformal diffeomorphism …
Jeffrey Case's user avatar
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10 votes
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Definition of the conformal metric

Let $(M,[g])$ be a conformal manifold; i.e. $(M,g)$ is a Riemannian manifold and $[g] = \{ u^2g \mathrel{}:\mathrel{} u \in C^\infty(M), u>0 \}$ is the set of Riemannian metrics conformal to $g$. It i …
Jeffrey Case's user avatar
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3 votes
Accepted

Yamabe operator, conformal transformations and square of the Dirac operator

The discrepancy comes from the fact that the square of the Dirac operator is in general not conformally covariant. There are ways to modify powers of the Dirac operator to get a conformally covariant …
Jeffrey Case's user avatar
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18 votes
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Geometric interpretation of the Weyl tensor?

There is such an interpretation, with a few caveats. Essentially, there is a canonical connection on a certain vector bundle for which the "principal part" of the curvature is the Weyl tensor in dime …
Jeffrey Case's user avatar
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2 votes
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Expansion of metric near boundary of 3 dimensional Poincaré-Einstein/hyperbolic manifolds

This is only an answer to the request for references about the expansion and an interpretation of $h_2$ from the standpoint of the metric $x^2g$. Theorem 7.4 in the book The Ambient Metric proves that …
Jeffrey Case's user avatar
  • 1,713