2014 | OriginalPaper | Buchkapitel
Multivariate Dimension Polynomials of Inversive Difference Field Extensions
verfasst von : Alexander Levin
Erschienen in: Algebraic and Algorithmic Aspects of Differential and Integral Operators
Verlag: Springer Berlin Heidelberg
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In this paper we introduce a method of characteristic sets with respect to several term orderings for inversive difference polynomials. Using this technique, we prove the existence and obtain a method of computation of multivariate dimension polynomials of finitely generated inversive difference field extensions. We also find new invariants of such extensions that are not carried by univariate dimension polynomials.