, Volume 255, Issue 2, pp 343-355
Date: 23 Aug 2006

Pluricanonical systems on irregular 3-folds of general type

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Abstract

In this paper we prove that if X is an irregular 3-fold with χ(ω X ) > 0, then |mK X | is birational for all m ≥  5.

The first author was partially supported by NSC and NCTS of Taiwan. The second author was partially supported by NSF research grant no: 0456363.