科研之友
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摘要
S. Payne asked whether for a variety X of dimension d, the closed cone spanned by the divisors ample in dimension k (1 %26lt;= k %26lt;= d) and the closed cone spanned by the classes of curves on some Q-factorial small modifications of X movable in codimension d - k are dual to each other. We prove that this is true for Fano type varieties and Mori dream spaces.
- 出版日期2012
