Algebraic geometry
Birational geometry of the moduli space of pure sheaves on quadric surface
[Géométrie birationnelle de l'espace moduli des faisceaux purs sur une surface quadrique]
Comptes Rendus. Mathématique, Tome 355 (2017) no. 10, pp. 1082-1088.

Dans cette note, nous étudions la géométrie birationnelle de l'espace des modules des faisceaux stables sur une quadrique, de polynôme de Hilbert 5m+1 et de classes de Chern (2,3). Pour cela, nous donnons une application birationnelle entre l'espace des modules et un fibré projectif au dessus d'une grassmanienne, qui est une composition d'éclatements et de contractions lisses.

We study birational geometry of the moduli space of stable sheaves on a quadric surface with Hilbert polynomial 5m+1 and c1=(2,3). We describe a birational map between the moduli space and a projective bundle over a Grassmannian as a composition of smooth blow-ups/downs.

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DOI : 10.1016/j.crma.2017.09.005
Chung, Kiryong 1 ; Moon, Han-Bom 2

1 Department of Mathematics Education, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea
2 School of Mathematics, Institute for Advanced Study, Princeton, NJ 08540, United States
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Chung, Kiryong; Moon, Han-Bom. Birational geometry of the moduli space of pure sheaves on quadric surface. Comptes Rendus. Mathématique, Tome 355 (2017) no. 10, pp. 1082-1088. doi : 10.1016/j.crma.2017.09.005. http://www.numdam.org/articles/10.1016/j.crma.2017.09.005/

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