Big algebras yield ring structures
Paper Authors:
Tamás Hausel
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Big algebras are maximal commutative subalgebras of Kirillov algebras
They induce ring structures on weight multiplicity spaces
Equivariant intersection cohomology of affine Schubert varieties has ring structure from big algebras
Explicit constructions and examples are provided
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Big algebras yield ring structures
This paper introduces 'big algebras', which are commutative subalgebras of Kirillov algebras. The authors show these algebras can be used to define ring structures on weight multiplicity spaces and equivariant intersection cohomology of affine Schubert varieties.
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