Equations algébro-différentielles (DAE)
     
     
     
     
     
     
    • Le logiciel HIDAES (Higher Index Differential Algebraic Equations Solver) :
       
      This software is designed for the numerical solution of DAEs. Its main feature is to solve high index problems that can't  be solved with usual Runge-Kutta and BDF solvers. Similarly to the general DAEs integrators developed by Campbell or Kunkel/Mehrman, it is based on index reduction techniques. However, some computer algebra is carried out for reducing formally the DAE to an index one problem, so that the index is computed and the hidden constraints are explicitely worked out. This symbolic pre-processing reduces significantly the amount of work for the computation of consistent initial conditions and the numerical solution. For ODE's and semi-explicit index one DAE's, the code coincides with RADAU5. 
      • The Maple package has been written by Josselin Visconti
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