  sylv
  Builtin Function



      SSyynnooppssiiss
        Solve the Sylvester matrix equation

      SSyynnttaaxx
        sylv ( _A , _B , _C )

        sylv ( _A , _C )

      DDeessccrriippttiioonn
        Sylv solves the Sylvester matrix equation:



          _A_*_X _+ _X_*_B _= _-_C


     or



          _A_*_X _+ _X_*_A_' _= _-_C   (Lyapunov equation)


     _A and _B must both be upper quasi-triangular (if real), or
     triangular (if complex).

     If _A and or _B are not upper quasi-triangular/triangular, then it is
     usually easier to use lyap. Lyap performs a Schur decomposition on
     A and B before using sylv.

     Sylv uses the LAPACK functions DTRSYL, or ZTRSYL.






























