Strange Duality on Rational Surfaces II: Higher-Rank Cases
Strange Duality on Rational Surfaces II: Higher-Rank Cases
复制标题
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
中科院分区:
文献类型:
--
作者:
Yao Yuan
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.