DSISL man page on IRIX

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DSISL(3F)							     DSISL(3F)

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

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

DESCRIPTION
     On Entry

     A DOUBLE PRECISION(LDA,N)
	the output from DSIFA.

     LDA INTEGER
	the leading dimension of the array  A .

     N INTEGER
	the order of the matrix	 A .

     KPVT INTEGER(N)
	the pivot vector from DSIFA.

     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  DSICO  has set RCOND .EQ. 0.0 or	DSIFA
     has set INFO .NE. 0  .  To compute	 INVERSE(A) * C	 where	C  is a matrix
     with  P  columns
	CALL DSIFA(A,LDA,N,KPVT,INFO)
	IF (INFO .NE. 0) GO TO ...
	DO 10 J = 1, P
	CALL DSISL(A,LDA,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

									Page 1

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