This document is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. The copyright holder grants you permission to redistribute this document freely as a verbatim copy. Furthermore, the copyright holder permits you to develop any derived work from this document provided that the following conditions are met. a) The derived work acknowledges the fact that it is derived from this document, and maintains a prominent reference in the work to the original source. b) The fact that the derived work is not the original OpenMath document is stated prominently in the derived work. Moreover if both this document and the derived work are Content Dictionaries then the derived work must include a different CDName element, chosen so that it cannot be confused with any works adopted by the OpenMath Society. In particular, if there is a Content Dictionary Group whose name is, for example, `math' containing Content Dictionaries named `math1', `math2' etc., then you should not name a derived Content Dictionary `mathN' where N is an integer. However you are free to name it `private_mathN' or some such. This is because the names `mathN' may be used by the OpenMath Society for future extensions. c) The derived work is distributed under terms that allow the compilation of derived works, but keep paragraphs a) and b) intact. The simplest way to do this is to distribute the derived work under the OpenMath license, but this is not a requirement. If you have questions about this license please contact the OpenMath society at http://www.openmath.org. permgrp http://www.openmath.org/cd http://www.openmath.org/cd/permgrp.ocd 2006-03-30 2004-03-30 3 0 experimental A CD of functions for permutation groups Written by A. Solomon on 1998-11-19 Modified by David Carlisle 1999-04-28 orbit application The binary function whose value is the set of integers which are in the orbit of the second argument under the action of the first argument which is a permutation group. stabilizer application The first argument is a permutation group, the second is some object (point or set) upon which the first argument acts. The value is the subgroup of the first argument which stabilize the second argument. is_transitive application The unary function whose value is true iff the permutation group argument acts transitively. is_primitive application The unary function whose value is true iff its permutation group argument acts primitively.