DSPSL man page on IRIX

DSPSL man page on IRIX

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DSPSL(3F)							     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

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