49 citations · 113 across the 27 of their papers we have counts for
Showing 2011 · math.DGShow all
2 papers · 2 filters
math.DG2011
The sharp lower bound of the first eigenvalue of the sub-Laplacian on a quaternionic contact manifold
Srefan Ivanov, Alexander Petkov, Dimiter Vassilev
The main technical result of the paper is a Bochner type formula for the sub-laplacian on a quaternionic contact manifold. With the help of this formula we establish a version of L…
math.DG2011
Bianchi type A hyper-symplectic and hyper-Kähler metrics in 4D
Luis C. de Andrés, Marisa Fernández, Stefan Ivanov +3
We present a simple explicit construction of hyper-Kaehler and hyper-symplectic (also known as neutral hyper-Kaehler or hyper-parakaehler) metrics in 4D using the Bianchi type grou…