منابع مشابه
Mori 9_9
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The Kleiman-Mori cone plays important roles in the birational geometry. In this paper, we construct complete varieties whose Kleiman-Mori cones have interesting properties. First, we construct a simple and explicit example of complete non-projective singular varieties for which Kleiman’s ampleness criterion does not hold. More precisely, we construct a complete non-projective toric variety X an...
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We show there is a symplectic conifold transition of a projective 3-fold which is not deformation equivalent to any Kähler manifold. The key ingredient is Mori’s classification of extremal rays on smooth projective 3-folds. It follows that there is a (nullhomologous) Lagrangian sphere in a projective variety which is not the vanishing cycle of any Kähler degeneration, answering a question of Do...
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ژورنال
عنوان ژورنال: Japanese Circulation Journal
سال: 1972
ISSN: 0047-1828,1347-4839
DOI: 10.1253/jcj.36.1123