36 citations · 99 across the 11 of their papers we have counts for
13 papers
Modified conformal extensions
Matthias Hammerl, Katja Sagerschnig, Josef Šilhan +1
We present a geometric construction and characterization of -dimensional split-signature conformal structures endowed with a twistor spinor with integrable kernel. The construc…
Parabolic Compactification of Homogeneous Spaces
Andreas Cap, A. Rod Gover, Matthias Hammerl
In this article, we study compactifications of homogeneous spaces coming from equivariant, open embeddings into a generalized flag manifold . The key to this approach is that…
Fefferman-Graham ambient metrics of Patterson-Walker metrics
Matthias Hammerl, Katja Sagerschnig, Josef Šilhan +2
Given an -dimensional manifold with an affine connection , we show that the associated Patterson-Walker metric on admits a global and explicit Fefferman-Graham…
Conformal Patterson-Walker metrics
Matthias Hammerl, Katja Sagerschnig, Josef Šilhan +2
The classical Patterson-Walker construction of a split-signature (pseudo-)Riemannian structure from a given torsion-free affine connection is generalized to a construction of a spl…
A Projective-to-Conformal Fefferman-Type Construction
Matthias Hammerl, Katja Sagerschnig, Josef Šilhan +2
We study a Fefferman-type construction based on the inclusion of Lie groups into . The construction associates a split-signature -confor…
Normal BGG solutions and polynomials
A. Cap, A. R. Gover, M. Hammerl
First BGG operators are a large class of overdetermined linear differential operators intrinsically associated to a parabolic geometry on a manifold. The corresponding equations in…