DSPSL(3F)

NAME
     DSPSL   - DSISL solves the double precision symmetric system A * X = B
     using the factors computed by DSPFA.


SYNOPSYS
      SUBROUTINE DSPSL(AP,N,KPVT,B)

DESCRIPTION
     On Entry

     AP DOUBLE PRECISION(N*(N+1)/2)
        the output from DSPFA.

     N INTEGER
        the order of the matrix  A .

     KPVT INTEGER(N)
        the pivot vector from DSPFA.

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

     B the solution vector  X . Error Condition

     A division by zero may occur if  DSPCO  has set RCOND .EQ. 0.0 or  DSPFA
     has set INFO .NE. 0  .  To compute  INVERSE(A) * C  where  C  is a matrix
     with  P  columns
        CALL DSPFA(AP,N,KPVT,INFO)
        IF (INFO .NE. 0) GO TO ...
        DO 10 J = 1, P
        CALL DSPSL(AP,N,KPVT,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 DAXPY,DDOT Fortran IABS