ON CLASSIFICATION OF PROJECTIVE VARIETIES WITH NON-INTEGRAL NEF VALUES

摘要

Let M be an n-dimensional normal projective variety with only Gorenstein, terminal, Q- factorial singularities. Let L be an ample line bundle on M. Let τdenote the nef value of (M, L). The classification of (M, L) via the value morphism is given for the situations whenτ satisfies n-5<τn-4, or n-6<τ