Rational equivalence of 0-cycles on $K3$ surfaces and conjectures of Huybrechts and O'Grady
Rational equivalence of 0-cycles on $K3$ surfaces and conjectures of Huybrechts and O'Grady
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$K3$ 表面上 0 循环的有理等价以及 Huybrechts 和 OGrady 的猜想
DOI:
10.1017/cbo9781107416000.021
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
C. Voisin
中科院分区:
文献类型:
--
作者:
C. Voisin
We give a new interpretation of O'Grady's filtration on the $CH_0$ group of a $K3$ surface. In particular, we get a new characterization of the canonical 0-cycles $kc_X$ : this is the only 0-cycle on $X$ whose orbit under rational equivalence is of dimension $k$. Using this, we extend results of Huybrechts and O'Grady concerning Chern classes of simple vector bundles on $K3$ surfaces.