
C programs for Hermite-Birkhoff-Obrechkoff 4-stage 4-step ODE solver of order 14 HBOQ(14)4
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with quantized stepsize
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The main directory contains the following C-files of HBOQ(14)4:

(*) file HBO144q16.cpp contains
      (*) subroutine HBO7inicnstps which integrates 4 initial constant steps
      (*) subroutine id123O14() which gives as output: coeffs of interpol polyn using 1st, 2nd, 3rd derivatives 
                     so that the value of interpol polyn at t=tend, err O(h^15) can be obtained
      (*) subroutine HBO144q16 contains 
          Hermite--Birkhoff--Obrechkoff (HBO) 4-stage 4-step ODE solver of order 14
          with quantized stepsize
(*) HBO144cfs.cpp contains the coefficients (for the 16 values of ratio r^Q) of the formulae 
    to calculate y(n+c2), y(n+c3), y(n+c4), y(n+1). 

The following examples illustrate the use of the code: 

(*) D1example.cpp
(*) D5example.cpp
(*) D99example.cpp
(*) D999example.cpp
(*) HHexample.cpp

The ODE problems are in the following files: odeD.cpp, odeHH.cpp

If you have questions or comments, please contact
Truong Nguyen-Ba
Department of Mathematics and Statistics, University of Ottawa,
Ottawa, Ontario, Canada K1N 6N5.
tnguyen@mathstat.uottawa.ca
%
Philip W. Sharp
Department of Mathematics, University of Auckland, New Zealand.
sharp@math.auckland.ac.nz
%
R\'emi Vaillancourt
Department of Mathematics and Statistics, University of Ottawa,
Ottawa, Ontario, Canada K1N 6N5.
remi@uottawa.ca
