Prime Ideals of q-Commutative Power Series Rings

Details Prime Ideals of q-Commutative Power Series Rings Prime Ideals of q-Commutative Power Series Rings

2007-07-24

arxiv.org/abs/0707.3627v5

Mathematics

Rings and Algebras

Revised; to appear in Algebras and Representation Theory. In this (final) version, catenarity is established, by combining nor

Scientific paper

We study the "q-commutative" power series ring R:=k_q[[x_1,...,x_n]], defined by the relations x_ix_j = q_{ij}x_j x_i, for multiplicatively antisymmetric scalars q_{ij} in a field k. Our results provide a detailed account of prime ideal structure for a class of noncommutative, complete, local, noetherian domains having arbitrarily high (but finite) Krull, global, and classical Krull dimension. In particular, we prove that the prime spectrum of R is normally separated and is finitely stratified by commutative noetherian spectra. Combining this normal separation with results of Chan, Wu, Yekutieli, and Zhang, we are able to conclude that R is catenary. Following the approach of Brown and Goodearl, we also show that links between prime ideals are provided by canonical automorphisms. Moreover, for sufficiently generic q_{ij}, we find that R has only finitely many prime ideals and is a UFD (in the sense of Chatters).

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