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arxiv: 0803.3848 · v2 · pith:RYCEX6Z6new · submitted 2008-03-27 · 🧮 math.QA

Categorified quantum sl(2) and equivariant cohomology of iterated flag varieties

classification 🧮 math.QA
keywords quantumcategorifiescategorycohomologyequivariantflagiteratedrepresentation
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A 2-category was introduced in arXiv:0803.3652 [math.QA] that categorifies Lusztig's integral version of quantum sl(2). Here we construct for each positive integer N arepresentation of this 2-category using the equivariant cohomology of iterated flag varieties. This representation categorifies the irreducible (N+1)-dimensional representation of quantum sl(2).

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  1. Action of the Witt algebra on categorified quantum groups

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    Constructs an action of the positive Witt algebra on categorified quantum groups for simply-laced Lie algebras, recovering the foam action in type A and inducing the current-algebra action via trace decategorification.