Concept information
Preferred term
Weyl group
Definition
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In mathematics, in particular the theory of Lie algebras, the Weyl group (named after Hermann Weyl) of a root system Φ is a subgroup of the isometry group of that root system. Specifically, it is the subgroup which is generated by reflections through the hyperplanes orthogonal to the roots, and as such is a finite reflection group. In fact it turns out that most finite reflection groups are Weyl groups. Abstractly, Weyl groups are finite Coxeter groups, and are important examples of these.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Weyl_group)
Broader concept
In other languages
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French
URI
http://data.loterre.fr/ark:/67375/PSR-P64TCLGF-0
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