SSPSL(3F)SSPSL(3F)NAMESSPSL - SSISL solves the real symmetric system A * X = B using the
factors computed by SSPFA.
SYNOPSYS
SUBROUTINE SSPSL(AP,N,KPVT,B)
DESCRIPTION
On Entry
AP REAL(N*(N+1)/2)
the output from SSPFA.
N INTEGER
the order of the matrix A .
KPVT INTEGER(N)
the pivot vector from SSPFA.
B REAL(N)
the right hand side vector. On Return
B the solution vector X . Error Condition
A division by zero may occur if SSPCO has set RCOND .EQ. 0.0 or SSPFA
has set INFO .NE. 0 . To compute INVERSE(A) * C where C is a matrix
with P columns
CALL SSPFA(AP,N,KPVT,INFO)
IF (INFO .NE. 0) GO TO ...
DO 10 J = 1, P
CALL SSPSL(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 SAXPY,SDOT Fortran IABS
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