Euler characteristics of moduli spaces of torsion free sheaves on toric surfaces
Euler characteristics of moduli spaces of torsion free sheaves on toric surfaces
复制标题
复曲面无扭滑轮模空间的欧拉特性
DOI:
10.1007/s10711-014-9966-2
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发表时间:
2014
影响因子:
0.5
通讯作者:
Kool M
中科院分区:
文献类型:
--
作者:
Kool M
Given a smooth toric variety, the action of the toruslifts to the moduli spaceof stable sheaves on. Using the pioneering work of Klyacho, a fairly explicit combinatorial description of the fixed point locuscan be given (as shown by earlier work of the author). In this paper, we apply this description to the case of torsion free sheaves on a smooth toric surface. A general expression for the generating function of the Euler characteristics of such moduli spaces is obtained. The generating function is expressed in terms of Euler characteristics of certain moduli spaces of stable configurations of linear subspaces appearing in classical GIT. The expression holds foranychoice of, polarization, rank, and first Chern class. Specializing to various examples allows us to compute some new as well as known generating functions.
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