SLATEC Routines --- CDCOR ---

*DECK CDCOR
      SUBROUTINE CDCOR (DFDY, EL, FA, H, IERROR, IMPL, IPVT, MATDIM,
     8   MITER, ML, MU, N, NDE, NQ, T, USERS, Y, YH, YWT, EVALFA, SAVE1,
     8   SAVE2, A, D, JSTATE)
C***BEGIN PROLOGUE  CDCOR
C***SUBSIDIARY
C***PURPOSE  Subroutine CDCOR computes corrections to the Y array.
C***LIBRARY   SLATEC (SDRIVE)
C***TYPE      COMPLEX (SDCOR-S, DDCOR-D, CDCOR-C)
C***AUTHOR  Kahaner, D. K., (NIST)
C             National Institute of Standards and Technology
C             Gaithersburg, MD  20899
C           Sutherland, C. D., (LANL)
C             Mail Stop D466
C             Los Alamos National Laboratory
C             Los Alamos, NM  87545
C***DESCRIPTION
C
C  In the case of functional iteration, update Y directly from the
C  result of the last call to F.
C  In the case of the chord method, compute the corrector error and
C  solve the linear system with that as right hand side and DFDY as
C  coefficient matrix, using the LU decomposition if MITER is 1, 2, 4,
C  or 5.
C
C***ROUTINES CALLED  CGBSL, CGESL, SCNRM2
C***REVISION HISTORY  (YYMMDD)
C   790601  DATE WRITTEN
C   900329  Initial submission to SLATEC.
C***END PROLOGUE  CDCOR