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The Weyl group of a root system is a subgroup generated by reflections through the hyperplanes orthogonal to the roots.

12 votes
3 answers
750 views

The orders of the exceptional Weyl groups

Who first calculated the orders of the Weyl groups $E_6$, $E_7$, $E_8$, $F_4$, and $G_2$? How were these orders calculated?
Zoltan Fleishman's user avatar
7 votes
1 answer
258 views

A name for the Weyl group of $\frak{so_{2n}}$

For the $A$-series the Weyl group is the symmetric group $S_n$. For the $B$ and $C$ series the Weyl group is the hyperoctahedral group $\mathbb Z_2 \wr S_n$. A) Does the $D$-series Weyl group $S_n \ma …
Zoltan Fleishman's user avatar