Prime ideals in certain quantum determinantal rings

Details Prime ideals in certain quantum determinantal rings Prime ideals in certain quantum determinantal rings

1999-03-24

arxiv.org/abs/math/9903143v1

Mathematics

Quantum Algebra

13 pages, to appear in Proceedings of Euroconference on Interactions between Ring Theory and Representations of Algebras (Murc

Scientific paper

The ideal I generated by the 2x2 quantum minors in the algebra A = O_q(M_{m,n}(k)) (the quantized coordinate algebra of mxn matrices) is investigated. Analogues of the First and Second Fundamental Theorems of Invariant Theory are proved. In particular, it is shown that I is a completely prime ideal, that is, A/I is an integral domain, and that A/I is the ring of coinvariants of a coaction of k[x,x^{-1}] on O_q(k^m) tensor O_q(k^n), a tensor product of two quantum affine spaces. (That the ideal of A generated by the txt quantum minors, for any t, is completely prime is proved in the authors' paper `Quantum determinantal ideals'.) There is a natural torus action on A/I induced by an (m+n)-torus action on A. We identify the invariant prime ideals for this action and deduce consequences for the prime spectrum of A/I.

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