Irreducible finite integral matrix groups of degree 8 and 10

Souvignier, Bernd

doi:10.1090/S0025-5718-1994-1213836-X

Irreducible finite integral matrix groups of degree $8$ and $10$

Author: Bernd Souvignier
Journal: Math. Comp. 63 (1994), 335-350
MSC: Primary 20H15; Secondary 11E12, 20C10, 20C40
DOI: https://doi.org/10.1090/S0025-5718-1994-1213836-X
MathSciNet review: 1213836
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Abstract: The lattices of eight- and ten-dimensional Euclidean space with irreducible automorphism group or, equivalently, the conjugacy classes of these groups in $\mathrm {GL}_n(\mathbb {Z})$ for $n = 8,10$, are classified in this paper. The number of types is 52 in the case $n = 8$, and 47 in the case $n = 10$. As a consequence of this classification one has 26, resp. 46, conjugacy classes of maximal finite irreducible subgroups of $\mathrm {GL}_8(\mathbb {Z})$, resp. $\mathrm {GL}_{10}(\mathbb {Z})$. In particular, each such group is absolutely irreducible, and therefore each of the maximal finite groups of degree 8 turns up in earlier lists of classifications.

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