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- Dane L. Flannery, Eamonn A. O'Brien
- IJAC
- 2005

- Mike F. Newman, Eamonn A. O'Brien
- IJAC
- 1996

We show how automorphisms can be used to reduce signiicantly the resources needed to enforce laws in p-groups. This increases the extent to which Burnside groups with prime-power exponent can be studied in detail. For example, we describe how to construct power-conjugate presentations for the restricted Burnside groups R(5; 4) and R(3; 5) which have orders… (More)

- Henrik Bäärnhielm, Derek F. Holt, Charles R. Leedham-Green, Eamonn A. O'Brien
- J. Symb. Comput.
- 2015

- George Havas, Mike F. Newman, Eamonn A. O'Brien
- Geometric and Computational Perspectives on…
- 1994

- Hans Ulrich Besche, Bettina Eick, Eamonn A. O'Brien
- IJAC
- 2002

As a contribution to the project for recognising matrix groups deened over nite elds, we describe an algorithm for deciding whether or not the natural module for such a matrix group can be decomposed into a non-trivial tensor product. In the aarmative case, a tensor decomposition is returned. As one component, we develop algorithms to compute p-local… (More)

In this paper we take a significant step forward in the classification of 3-groups of coclass 2. Several new phenomena arise. Theoretical and computational tools have been developed to deal with them. We identify and are able to classify an important subset of the 3-groups of coclass 2. With this classification and further extensive computations, it is… (More)

- Eamonn A. O'Brien, Michael R. Vaughan-Lee
- IJAC
- 2002

- E A O'Brien, W Willems
- IEEE Transactions on Information Theory
- 2011

We prove that the automorphism group of a binary self-dual doubly even [72, 36, 16] code has order 5, 7, 10, 14 or <i>d</i> where <i>d</i> divides 18 or 24, or it is <i>A</i><sub>4</sub> × <i>C</i><sub>3</sub>.

- Mike F. Newman, Eamonn A. O'Brien
- ACM SIGSAM Bulletin
- 1991