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<A name="Comments"><B><FONT SIZE="+1">Further Comments</FONT></B></A>
<PRE>
  The option LYAPUN = 'R' may occasionally produce slightly worse
  or better estimates, and it is much faster than the option 'O'.
  When SEPD is computed and it is zero, the routine returns
  immediately, with RCOND and FERR (if requested) set to 0 and 1,
  respectively. In this case, the equation is singular.

  Let B be an N-by-M matrix (if TRANA = 'N') or an M-by-N matrix
  (if TRANA = 'T' or 'C'), let R be an M-by-M symmetri