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The Orbit-Stabilizer Problem for Linear Groups

Published online by Cambridge University Press:  20 November 2018

John D. Dixon*
Affiliation:
Carleton University, Ottawa, Ontario
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Let G be a subgroup of the general linear group GL(n, Q) over the rational field Q, and consider its action by right multiplication on the vector space Qn of n-tuples over Q. The present paper investigates the question of how we may constructively determine the orbits and stabilizers of this action for suitable classes of groups. We suppose that G is specified by a finite set {x1, …, xr) of generators, and investigate whether there exist algorithms to solve the two problems:

(Orbit Problem) Given u, vQn, does there exist xG such that ux = v; if so, find such an element x as a word in x1, …, xr and their inverses.

(Stabilizer Problem) Given u, vQn, describe all words in x1, …, xr and their inverses which lie in the stabilizer

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1985

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