chisl.f
SUBROUTINE CHISL (A, LDA, N, KPVT, B)
C***BEGIN PROLOGUE CHISL
C***PURPOSE Solve the complex Hermitian system using factors obtained
C from CHIFA.
C***LIBRARY SLATEC (LINPACK)
C***CATEGORY D2D1A
C***TYPE COMPLEX (SSISL-S, DSISL-D, CHISL-C, CSISL-C)
C***KEYWORDS HERMITIAN, LINEAR ALGEBRA, LINPACK, MATRIX, SOLVE
C***AUTHOR Bunch, J., (UCSD)
C***DESCRIPTION
C
C CHISL solves the complex Hermitian system
C A * X = B
C using the factors computed by CHIFA.
C
C On Entry
C
C A COMPLEX(LDA,N)
C the output from CHIFA.
C
C LDA INTEGER
C the leading dimension of the array A .
C
C N INTEGER
C the order of the matrix A .
C
C KVPT INTEGER(N)
C the pivot vector from CHIFA.
C
C B COMPLEX(N)
C the right hand side vector.
C
C On Return
C
C B the solution vector X .
C
C Error Condition
C
C A division by zero may occur if CHICO has set RCOND .EQ. 0.0
C or CHIFA has set INFO .NE. 0 .
C
C To compute INVERSE(A) * C where C is a matrix
C with P columns
C CALL CHIFA(A,LDA,N,KVPT,INFO)
C IF (INFO .NE. 0) GO TO ...
C DO 10 J = 1, p
C CALL CHISL(A,LDA,N,KVPT,C(1,J))
C 10 CONTINUE
C
C***REFERENCES J. J. Dongarra, J. R. Bunch, C. B. Moler, and G. W.
C Stewart, LINPACK Users' Guide, SIAM, 1979.
C***ROUTINES CALLED CAXPY, CDOTC
C***REVISION HISTORY (YYMMDD)
C 780814 DATE WRITTEN
C 890531 Changed all specific intrinsics to generic. (WRB)
C 890831 Modified array declarations. (WRB)
C 891107 Modified routine equivalence list. (WRB)
C 891107 REVISION DATE from Version 3.2
C 891214 Prologue converted to Version 4.0 format. (BAB)
C 900326 Removed duplicate information from DESCRIPTION section.
C (WRB)
C 920501 Reformatted the REFERENCES section. (WRB)
C***END PROLOGUE CHISL