Department of Mathematics


Title : Constructive recognition of alternating and symmetric groups
Speaker: Jonathan Conder
Affiliation: University of Auckland
Time: 12:00 Thursday, 18 April, 2013
Location: 303-412
Abstract
Groups are typically represented on computers using permutations or matrices. A black-box group is one for which this internal representation has been 'forgotten' - we are restricted to multiplying elements and taking inverses. Programs which deal with such groups are more difficult to write, but are more flexible than those which are limited to a specific representation. We outline one such algorithm, which identifies whether a given black-box group is isomorphic to the alternating or symmetric group of a certain degree, and if so, constructs an explicit isomorphism between the two groups.


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