File: sylv.cat

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scilab 2.6-4
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sylv             Scilab Group             Scilab Function              sylv
NAME
   sylv - Sylvester equation.
  
CALLING SEQUENCE
 sylv(A,B,C,flag)
PARAMETERS
 A,B,C        : three real matrices of appropriate dimensions.
              
 flag         character string ('c' or 'd')
              
DESCRIPTION
   computes X, solution of the "continuous time" Sylvester equation
  
 A*X+X*B=C 
   computes X, solution of the "discrete time" Sylvester equation
  
 A*X*B-X=C
EXAMPLE
 A=rand(4,4);C=rand(4,3);B=rand(3,3);
 X = sylv(A,B,C,'c');
 norm(A*X+X*B-C)
 X=sylv(A,B,C,'d') 
 norm(A*X*B-X-C)
SEE ALSO
   lyap