- #1
Kara386
- 208
- 2
Homework Statement
Show the (real) dimension of su(n) is ##n^2-1##.
Homework Equations
The Attempt at a Solution
##su(n) = \{ A \in M_n(\mathbb{C}) | A+A^T = 0, tr(A) =0 \}##
Maybe the solution is obvious, because I can't find a thing online about how to do this. But I can't see how to do it! I imagine since I'm after a real dimension, the first thing to do is somehow consider real and complex parts separately. But I'm not sure exactly how to do that, or how I'm meant to then find the dimension of this Lie algebra. Could someone briefly outline the method? I really appreciate any help, thanks! :)
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