2019/04/20 by Yan, Jianshi
#Algebraic Geometry (math.AG) #FOS: Mathematics
paper · doi:10.48550/arxiv.1904.09393
We show that, for nonsingular projective 4-folds V of general type with geometric genus pg≥ 2, the 33-canonical map is birational onto the image and the canonical volume has the lower bound 1/520, which improves a previous theorem by Chen and Chen.