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On generation of the root lattice by roots

Published online by Cambridge University Press:  12 February 2007

SIMON M. GOODWIN*
Affiliation:
School of Mathematics, University of Birmingham, Birmingham, B15 2TT. e-mail: goodwin@maths.bham.ac.uk

Abstract

Let Φ be a root system and let Γ ⊆ Φ. In this short paper we prove that Γ contains a -basis of the lattice that it generates.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 2007

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References

REFERENCES

[1] Borel, A. and Siebenthal, J. de. Les sous-groupes fermé de rank maximum des groupes de Lie clos. Comment. Math. Helv. 23 (1949), 200221.CrossRefGoogle Scholar
[2] Bourbaki, N.. Groupes et Algèbres de Lie (Hermann, 1975), Chapitres 4, 5 et 6.Google Scholar
[3] Dynkin, E. B.. Semisimple subalgebras of semisimple Lie algebras. Trans. Amer. Math. Soc. (2) 6 (1957), 111244.Google Scholar
[4] Goodwin, S. M.. On the conjugacy classes in maximal unipotent subgroups of simple algebraic groups. Transform. Groups 11, no. 1 (2006), 5176.CrossRefGoogle Scholar
[5] Goodwin, S. M.. Counting conjugacy classes in Sylow p-subgroups of Chevalley groups. J. Pure Appl. Algebra, to appear (2006).Google Scholar