English

Effective birationality of pluricanonical systems

Algebraic Geometry 2007-05-23 v1

Abstract

This is a sequal paper to math.AG/9909021. By using the theory of AZD originated by the author, I prove that for every smooth projective nn-fold XX of general type and every m=1n2+1, m\geq \lceil\sum_{\ell =1}^{n}\sqrt[\ell]{2} \ell\rceil +1, mKX\mid mK_{X}\mid gives a birational rational map from XX into a projective space, unless it has a nontrivial (relative dimension is positive) rational fiber space structure whose general fiber is birational to a variety of relatively low degree in a projective space.

Keywords

Cite

@article{arxiv.math/0006166,
  title  = {Effective birationality of pluricanonical systems},
  author = {Hajime Tsuji},
  journal= {arXiv preprint arXiv:math/0006166},
  year   = {2007}
}

Comments

25pages

R2 v1 2026-07-22T16:33:20.123Z