Saturday, 26 January 2008

rt.representation theory - What is a representation?

Let G be a compact Lie group with a maximal torus T, then what does the complex representation of G $alpha:Grightarrow U(n)$ mean? Does it mean that regarding
$alpha(g)$ as an isometry on $C^n$ for $gin G$?



Also, it will be good someone let me know the representations $alpha:Grightarrow U(n)$ for $G=G_2,F_4,E_6,E_7,E_8$? I don't have J.F.Adams's book "Lectures on exceptional lie groups"at hand.

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