FUNDAMENTALNAYA I PRIKLADNAYA MATEMATIKA

(FUNDAMENTAL AND APPLIED MATHEMATICS)

1998, VOLUME 4, NUMBER 2, PAGES 757-761

Normal surfaces whose anticanonical divisor is numerically positive

M. M. Grinenko

Abstract

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Let X be a normal projective surface and anticanonical divisor -KX is numerically positive. Then -KX is numerically ample and rationality of X is equivalent to its Q-factoriality.


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