Sources Esope | Cast3M

resyst
C RESYST    SOURCE    CHAT      05/01/13    02:55:04     5004
      SUBROUTINE RESYST(A,B,M,X,LU)
C
      IMPLICIT INTEGER(I-N)
      IMPLICIT REAL*8(A-H,O-Z)
      DIMENSION A(M,M),B(M),X(M)
C
C      PRINT*,A(LU,LU)
      X(LU)=B(LU)/A(LU,LU)
C
      DO 40 I=LU-1,1,-1
C
      TEMP=0.D0
C
      DO 50 J=I+1,LU
      TEMP=TEMP+A(I,J)*X(J)
   50 CONTINUE
C
      X(I)=(B(I)-TEMP)/A(I,I)
C
   40 CONTINUE
C
      RETURN
      END