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These are probably a bit stupid, so I hope you don't mind me asking them...
1)what is a fundamental representation?
2)what is a unitary representation? (Is it just the identity matrix?)
3)What is meant by the 'orthogonal complement' in the following context? "If [tex]W\subset{V}[/tex] is an invariant subspace for a unitary representation, [tex]\pi[/tex] on V, then the orthogonal complement of W inside V is also an invariante subspace for [tex]\pi[/tex]"
1)what is a fundamental representation?
2)what is a unitary representation? (Is it just the identity matrix?)
3)What is meant by the 'orthogonal complement' in the following context? "If [tex]W\subset{V}[/tex] is an invariant subspace for a unitary representation, [tex]\pi[/tex] on V, then the orthogonal complement of W inside V is also an invariante subspace for [tex]\pi[/tex]"