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DSISL(3F)							     DSISL(3F)

NAME    [Toc]    [Back]

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

SYNOPSYS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     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


									PPPPaaaaggggeeee 1111
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