Goal:  Compute four 19 stage order 6 schemes to arbitrary precision.
====

                               Ren-Cang Li, June 1, 1996
                               na.rcli@na-net.ornl.gov

Files in this directory:
=======================

   Maple Code:
   ----------

      Get_s19odr6abcd  ---  Driver routine to get the scheme s19odr6abcd

      s19odr6Eq        ---  Define determining equations.

      cx1fixedf3out    ---  Think the rest of cxi and cyj, except cx1,
                            as functions of cx1, determined by equations
                            f[i]=0, except f[3]=0. The procedure computes
                            the derivatives of these functions.

      iterndcx4        ---  Compute a zero of dcx4/dcx1 = 0.

      iterndcx23dcy24  ---  Compute a zero of cx2'-cx3'+cy2'-cy4'=0.	   
   
      iterndcx34dcy34  ---  Compute a zero of cx3'-cx4'+cy3'-cy4'=0.

      ToCheck          ---  Compute the residual errors of the determining
                            equations at a computed solution

      WriteItOut       ---  for dumping out solutions to s9odr4a and s9odr4b.

   Output:   s19odr6abcd by Get_s19odr6abcd

To Run: 
=======

   After Maple prompt, type   read('Get_s19odr6');

Comments: The code as it is operate use 100 decimal digits, while only
          dump 20 decimal digits of final solutions. To change these,
          please go to Get_s19odr6abcd, where 

              Digits    and   DumpDigits

          are initialized.
