CSISL(3F)

CSISL - CSISL solves the complex symmetric system A * X = B using the factors computed by CSIFA.

As shipped in IRIX 6.5.19. Unchanged since IRIX 6.5.

NAME
     CSISL   - CSISL solves the complex symmetric system A * X = B using the
     factors computed by CSIFA.


SYNOPSYS
      SUBROUTINE CSISL(A,LDA,N,KPVT,B)

DESCRIPTION
     On Entry

     A COMPLEX(LDA,N)
        the output from CSIFA.

     LDA INTEGER
        the leading dimension of the array  A .

     N INTEGER
        the order of the matrix  A .  KVPT    INTEGER(N)
        the pivot vector from CSIFA.

     B COMPLEX(N)
        the right hand side vector.  On Return

     B the solution vector  X . Error Condition

     A division by zero may occur if  CSICO  has set RCOND .EQ. 0.0 or  CSIFA
     has set INFO .NE. 0  .  To compute  INVERSE(A) * C  where  C  is a matrix
     with  P  columns
        CALL CSIFA(A,LDA,N,KVPT,INFO)
        If (INFO .NE. 0) GO TO ...
        DO 10 J = 1, P
        CALL CSISL(A,LDA,N,KVPT,C(1,j)) 10 CONTINUE LINPACK.  This version
     dated 08/14/78 .  James Bunch, Univ. Calif. San Diego, Argonne Nat. Lab.
     Subroutines and Functions BLAS CAXPY,CDOTU Fortran IABS