2015/09/22 by Pasquier, Boris
#Algebraic Geometry (math.AG) #FOS: Mathematics
paper · doi:10.48550/arxiv.1509.06502
Let X be a horospherical G-variety and let D be an effective ℚ-divisor of X that is stable under the action of a Borel subgroup B of G and such that D+K_X is ℚ-Cartier. We prove, using Bott-Samelson resolutions, that the pair (X,D) is klt if and only if \lfloor D\rfloor=0