%0 Journal Article %T Numerical bounds of canonical varieties %A Miguel A. Barja %J Mathematics %D 1999 %I arXiv %X We study lower bounds for the self-intersection of the canonical divisor of "canonical varieties" (i.e. varieties whose canonical linear system gives a birational map). We give some improvements for the known results in the case of surfaces and new bounds for the case of canonical threefolds. %U http://arxiv.org/abs/math/9909072v1