Certain classical groups are not well-defined

Colva Mary Roney-Dougal, John Bray, Derek Holt

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In this article we show that the isomorphism type of certain semilinear classical groups may depend on the choice of form matrix, as well as the dimension and the field size. When there is more than one isomorphism type, we count them and present effective polynomial- time algorithms to determine whether two such groups are isomorphic.
Original languageEnglish
Pages (from-to)171-180
JournalJournal of Group Theory
Publication statusPublished - 2009


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