Quantum analogues of Richardson varieties in the grassmannian and their toric degeneration

Details Quantum analogues of Richardson varieties in the grassmannian and their toric degeneration Quantum analogues of Richardson varieties in the grassmannian and their toric degeneration

2011-07-07

arxiv.org/abs/1107.1396v1

Mathematics

Quantum Algebra

Scientific paper

In the present paper, we are interested in natural quantum analogues of Richardson varieties in the type A grassmannians. To be more precise, the objects that we investigate are quantum analogues of the homogeneous coordinate rings of Richardson varieties which appear naturally in the theory of quantum groups. Our point of view, here, is geometric: we are interested in the regularity properties of these "non-commutative varieties", such as their irreducibility, normality, Cohen-Macaulayness... in the spirit of non-commutative algebraic geometry. A major step in our approach is to show that these algebras have the structure of an Algebra with a Straightening Law. From this, it follows that they degenerate to some quantum analogues of toric varieties.

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