SpectralRadius:

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   Compute the spectral radius of a matrix.

   Type SpectralRadius for a demo for the matrix [0 1;-0.5 -0.1],
   a damped oscillator.

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   Form:
   rho = SpectralRadius( m )
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   ------
   Inputs
   ------
   m              {:,:}    Matrix

   -------
   Outputs
   -------
   rho            (1,1)    Spectral radius

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