The $q$-Division Ring, Quantum Matrices and Semi-classical Limits

Our aim in this thesis is to use the language of deformation-quantization to understand certain quantized algebras by looking at properties of the corresponding commutative ones, and conversely to obtain results about the commutative algebras (upon which a Poisson structure is induced) using existing results for the non-commutative ones. We consider two main cases: firstly, the division ring of fractions of the quantum plane, which we view as a deformation of the commutative field of rational functions in two variables with respect to the bracket $\{x,y\} = xy$, and secondly, quantum matrices and their semi-classical limits. In particular, we use the theory of $H$-stratification to study the Poisson-prime and Poisson-primitive ideals of $\mathcal{O}(GL_3)$ and $\mathcal{O}(SL_3)$, and compare this to the corresponding results for quantum matrices.

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