Mathematics – Representation Theory
Scientific paper
2005-05-06
Adv. Math. 217 (2008), 683-712
Mathematics
Representation Theory
25 pages
Scientific paper
To any moment graph G we assign a subcategory V of the category of sheaves on G together with an exact structure. We show that in the case that the graph is associated to a non-critical block of the equivariant category O over a symmetrizable Kac-Moody algebra, V is equivalent (as an exact category) to the subcategory of modules that admit a Verma flag. The projective modules correspond under this equivalence to the intersection cohomology sheaves on the graph.
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