期刊
DUKE MATHEMATICAL JOURNAL
卷 161, 期 9, 页码 1797-1815出版社
DUKE UNIV PRESS
DOI: 10.1215/00127094-1593380
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The direct product of two Hilbert schemes of the same surface has natural K-theoly classes given by the alternating Ext-groups between the two ideal sheaves in question, twisted by a line bundle. We express the Chem classes of these virtual bundles in terms of Nakajima operators.
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