Let P be the group of upper triangular matrices in SL2(R). The injection η : P → GL2(C) can be viewed as a representation on V = C2. Show that η is not the sum of irreducible representations.
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Please show your work. – bsbb4 May 06 '19 at 21:52
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I look forward to telling others their comments – salome saberi May 07 '19 at 22:42