d have a unique
  solution even when matrix R is singular, under mild assumptions
  (see METHOD). The routine SG02AD works accordingly in this case.

</PRE>
<A name="Specification"><B><FONT SIZE="+1">Specification</FONT></B></A>
<PRE>
      SUBROUTINE SG02AD( DICO, JOBB, FACT, UPLO, JOBL, SCAL, SORT, ACC,
     $                   N, M, P, A, LDA, E, LDE, B, LDB, Q, LDQ, R,
     $                   LDR, L, LDL, RCONDU, X, LDX, ALFAR, ALFAI,
     $                   BETA, S, LDS, T, LDT, U, LDU, TOL, IWORK,
 