SUBROUTINE CHISL(A,LDA,N,KPVT,B) C***BEGIN PROLOGUE CHISL C***DATE WRITTEN 780814 (YYMMDD) C***REVISION DATE 820801 (YYMMDD) C***CATEGORY NO. D2D1A C***KEYWORDS COMPLEX,HERMITIAN,LINEAR ALGEBRA,LINPACK,MATRIX,SOLVE C***AUTHOR BUNCH, J., (UCSD) C***PURPOSE CHISL solves the COMPLEX HERMITIAN system A*X=B using C factors of CHIFA 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 LINPACK. This version dated 08/14/78 . C James Bunch, Univ. Calif. San Diego, Argonne Nat. Lab. C C Subroutines and Functions C C BLAS CAXPY,CDOTC C Fortran CONJG,IABS C***REFERENCES DONGARRA J.J., BUNCH J.R., MOLER C.B., STEWART G.W., C *LINPACK USERS GUIDE*, SIAM, 1979. C***ROUTINES CALLED CAXPY,CDOTC C***END PROLOGUE CHISL