3 papers
math.DG2024
On the classificarion of 3-dimensional spherical Sasakian manifolds
Daniel Sykes, Gerd Schmalz, Vladimir Ezhov
In this article we consider spherical hypersurfaces in with a fixed Reeb vector field as 3-dimensional Sasakian manifolds. We establish the correspondence between thr…
math.DG2024
Quasi-Einstein shearfree spacetimes lifted from Sasakian manifolds
Masoud Ganji, Gerd Schmalz, Daniel Sykes
In this article we prove that a certain class of {\it smooth} Sasakian manifolds admits lifts to 4-dimensional quasi-Einstein shearfree spacetimes of Petrov type II or D. This is r…
math.CV2024
CR embeddings of nilpotent Lie groups
M. G. Cowling, M. Ganji, A. Ottazzi +1
We show that a connected, simply connected nilpotent Lie group with an integrable left-invariant complex structure on a generating and suitably complemented subbundle of the tangen…