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Linear representations of algebras and groups, Lie theory, associative algebras, multilinear algebra.

3 votes
0 answers
123 views

Let $T$ be a maximal torus of $SU(k+1)$. Who is the normalizer $N(T)$ of $T$ in $O(2k+2)$?

I'm reading an article which I cannot understand a paragraph very well. $T$ is a maximal torus of $SU(k+1)$ acting linearly on $\mathbb{C}^{k+1}$. And here is what is written that I cannot fully under …
Gomes93's user avatar
  • 169
2 votes
1 answer
93 views

Show that if $\Theta$ is an infinitesimal weight of a real $T$-module $W$ ($T$ is a torus) t...

Show that if $\Theta$ is an infinitesimal weight of a real $T$-module $W$ ($T$ is a torus) then $-\Theta$ is also a weight. It is an exercise of Bröcker's book on Representations of Compact Lie Group …
Gomes93's user avatar
  • 169