Exts and vertex operators
نویسندگان
چکیده
منابع مشابه
Exts and Vertex Operators
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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In the 1980’s, the work of Frenkel, Lepowsky and Meurman, along with that of Borcherds, culminated in the notion of vertex operator algebra, and an example whose full symmetry group is the largest sporadic simple group: the Monster. Thus it was shown that the vertex operators of mathematical physics play a role in finite group theory. In this article we describe an extension of this phenomenon ...
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2 Vertex Operator Algebras 6 2.1 Notation and Conventions . . . . . . . . . . . . . . . . . . . . 6 2.2 Local Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Axioms for a Vertex Algebra . . . . . . . . . . . . . . . . . . . 9 2.4 Heisenberg Algebra . . . . . . . . . . . . . . . . . . . . . . . . 11 2.5 Virasoro Algebra . . . . . . . . . . . . . . . . . . . . . . . . . 13 2....
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ژورنال
عنوان ژورنال: Duke Mathematical Journal
سال: 2012
ISSN: 0012-7094
DOI: 10.1215/00127094-1593380