Exts and Vertex Operators

Details Exts and Vertex Operators Exts and Vertex Operators

2008-01-16

arxiv.org/abs/0801.2565v2

Mathematics

Algebraic Geometry

13 pages, 0 figures

Scientific paper

The direct product of two Hilbert schemes of the same surface has natural
K-theory classes given by the alternating Ext groups between the two ideal
sheaves in question, twisted by a line bundle. We express the Chern classes of
these virtual bundles in terms of Nakajima operators.

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