Rational, Replacement, and Local Invariants of a Group Action
Commutative Algebra
2007-05-23 v2 Algebraic Geometry
Abstract
The paper presents a new algorithmic construction of a finite generating set of rational invariants for the rational action of an algebraic group on the affine space. The construction provides an algebraic counterpart of the moving frame method in differential geometry. The generating set of rational invariants appears as the coefficients of a Groebner basis, reduction with respect to which allows to express a rational invariant in terms of the generators. The replacement invariants, introduced in the paper, are tuples of algebraic functions of the rational invariants. Any invariant, whether rational, algebraic or local, can be can be rewritten terms of replacement invariants by a simple substitution.
Keywords
Cite
@article{arxiv.math/0506574,
title = {Rational, Replacement, and Local Invariants of a Group Action},
author = {Evelyne Hubert and Irina A. Kogan},
journal= {arXiv preprint arXiv:math/0506574},
year = {2007}
}
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37 pages