Strange Duality on Rational Surfaces II: Higher-Rank Cases

Strange Duality on Rational Surfaces II: Higher-Rank Cases
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有理曲面上的奇怪对偶性 II:更高阶的情况

DOI:
10.1093/imrn/rny133
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发表时间:
2020
影响因子:
1
通讯作者:
Yao Yuan
Yao Yuan
中科院分区:
数学1区
文献类型:
--
作者:
Yao Yuan

文献摘要

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我们在有理曲面上研究了Le Potier奇特的对偶猜想。我们主要研究具有平凡的第一类和第二类的级轮的模空间,以及具有行列式和欧拉特征0的一维轮的模空间的奇异对偶映射。我们证明了在某些条件下,Hirzebruch曲面上和上的映射之间存在一个精确的序列,它适用于大量的情况。我们还证明了,对任意,都是同构的,内射的FORM和更多的是内射的。最后,我们证明了映射()是Fano有理直纹曲面的同构,因此是我们主要结果的一个推论。
We study Le Potier’s strange duality conjecture on a rational surface. We focus on the strange duality mapthat involves the moduli space of ranksheaves with trivial 1st Chern class and 2nd Chern class, and the moduli space of one-dimensional sheaves with determinantand Euler characteristic 0. We show there is an exact sequence relating the maptoandfor allunder some conditions onandthat applies to a large number of cases onor Hirzebruch surfaces. Also onwe show that for any,is an isomorphism for, injective forand moreoverandare injective. At the end we prove that the map() is an isomorphism foror Fano rational-ruled surfaces and, and hence so isas a corollary of our main result.