Ample vector bundles on singular varieties.
We give an affirmative answer to an open question posed by Demailly-Peternell-Schneider in 2001 and recently by Peternell. Let be a surjective morphism from a log canonical pair onto a -Gorenstein variety . If is nef, we show that is pseudo-effective.
We describe a bound on the degree of the generators for some adjoint rings on surfaces and threefolds.
Page 1