30 citations · 299 across the 38 of their papers we have counts for
4 papers · 1 filter
Two-jets of conformal fields along their zero sets
Andrzej Derdzinski
The connected components of the zero set of any conformal vector field , in a pseudo-Riemannian manifold of arbitrary signature, are of two types, which may be called `e…
Killing potentials with geodesic gradients on Kähler surfaces
Andrzej Derdzinski
We classify compact Kähler surfaces with nonconstant Killing potentials such that all integral curves of their gradients are reparametrized geodesics.
Special biconformal changes of Kähler surface metrics
Andrzej Derdzinski
The term "special biconformal change" refers, basically, to the situation where a given nontrivial real-holomorphic vector field on a complex manifold is a gradient relative to two…
Counterexamples to the pseudo-Riemannian Lichnerowicz conjecture
Andrzej Derdzinski
The original version of the paper claimed to disprove the pseudo-Riemannian Lichnerowicz conjecture of D'Ambra and Gromov. However, the argument contains a crucial sign error in th…