Is it a problem to do the change of variables in your problem definition? "Koshkarov, Oleksandr via petsc-users" <petsc-users@mcs.anl.gov> writes:
> Hello all, > > Can TSSolve be used to solve ODE backward in time? for example from t=10 upto > t=5 ? Google search reveals to use TSAdjointSolve, but by reading manual, It > looks it is used for sensitivity analysis which I do not need. And I am not > sure how to use it to just integrate ODE back in time. I tried to setup final > time and/or time step to be negative without success. > > Thank you and Happy New Year, > > Oleksandr.
