Remarks on quasi-polarized varieties
Remarks on quasi-polarized varieties
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DOI:
10.1017/s0027763000001562
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发表时间:
1989
影响因子:
0.8
通讯作者:
T. Fujita
中科院分区:
文献类型:
--
作者:
T. Fujita
Let V be a variety, which means, an irreducible reduced projective scheme over an algebraically closed field of any characteristic. A line bundle L on V is said to be nef if LC ≧ 0 for any curve C in V. Thus, “nef” is never an abbreviation of “numerically equivalent to an effective divisor”. L is said to be big if k (L) = n = dim V. In case L is nef, it is big if and only if Ln > 0 (cf. [F7; (6.5)]. When L is nef and big, the pair (V, L) will be called a quasi-polarized variety.