File: zeropen.cat

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scilab 2.6-4
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zeropen           Scilab Group           Scilab Function            zeropen
NAME
   zeropen - zero pencil
  
CALLING SEQUENCE
 [Z,U]=zeropen(Sl)
PARAMETERS
 Sl   : a linear system (syslin list in state-space form [A,B,C,D])
      
 Z    : matrix pencil Z=s*E-A
      
 U    : square orthogonal matrix
      
DESCRIPTION
   Z = sE - F  is the zero pencil of the linear system Sl with  matrices
  [A,B,C,D]. Utility function.
  
   With U row compression of [B;D] i.e, U*[B;D]=[0;*]; one has:
  
 U*[-sI+A |B;   [ Z |0;      
       C  |D] = [ * |*]
   The zeros of Z are the zeros of Sl.
  
SEE ALSO
   systmat, kroneck