Exercise For M in and a diagonal show that M jaj

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Exercise  For M in 

 and a diagonal show that  M  jaj  jbj using the lower bound  M  maxU MU which is always exact Hint Use U  diagfej g the blocks in U are unitary scalars and we may x one of them equal to 

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Multivariable Feedback Control Analysis And Design

ISBN: 9780470011683

2nd Edition

Authors: Sigurd Skogestad, Ian Postlethwaite

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