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Andres Franco Grisales: Rigidity and concircular symmetries

Time: Tue 2022-11-08 10.15 - 11.15

Location: Room 3418, Lindstedtsvägen 25

Language: English

Participating: Andres Franco Grisales, KTH

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We present a rigidity result in Lorentzian geometry, related to Bartnik’s conjecture, under the hypothesis of the existence of a concircular vector field with certain properties. We also study the relationship between two different notions of concircular vector fields found in the literature, and give conditions for a generalized Robertson–Walker spacetime to have a timelike concircular vector field.