Well, it is possible of course, but I thought petsc just has a simple switch. It looks like it does not
Thank you, Oleksandr. On 1/6/19 8:02 PM, Jed Brown wrote: > 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.
