H¥  Norm as Induced H2 Norm
§Let G(s) be a p× q transfer matrix. Then a multiplication operator is defined as              MG: L2 ®  L2   ,            MG f=Gf
• Then
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§ Proof: It is clear that ||G||¥ is the upper bound:
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• To show that ||G||¥  is the least upper bound, first choose a frequency w0 where                is maximum, i.e.,