52 citations · 196 across the 18 of their papers we have counts for
Showing 2020Show all
2 papers · 1 filter
math.DG2020★ 8 cited
Twisting non-shearing congruences of null geodesics, almost CR structures, and Einstein metrics in even dimensions
Arman Taghavi-Chabert
We investigate the geometry of a twisting non-shearing congruence of null geodesics on a conformal manifold of even dimension greater than four and Lorentzian signature. We give a…
math.DG2020★ 1 cited
Optical geometries
Anna Fino, Thomas Leistner, Arman Taghavi-Chabert
We study the notion of optical geometry, defined to be a Lorentzian manifold equipped with a null line distribution, from the perspective of intrinsic torsion. This is an instance…