%0 Journal Article
%T Severi type inequalities for irregular surfaces with ample canonical class
%A Margarida Mendes Lopes
%A Rita Pardini
%J Mathematics
%D 2009
%I arXiv
%X Let S be a smooth minimal complex projective surface of maximal Albanese dimension. Under the assumption that the canonical class of S is ample and the irregularity of S, q(S), is greater or equal to 5 we show that K^2>= 4\chi(S)+(10/3)q(S)-8, thus improving the well known Severi inequality K^2>=4\chi(S). We also give stronger inequalities under extra assumptions on the Albanese map or on the canonical map of S.
%U http://arxiv.org/abs/0904.1004v1