Barry Smith <[email protected]> writes: > Hence my suggestion to have TSSetLeftHandSideFunction() (or Jed's > suggestion to have multiple Right Hand side functions) this will allow > comparison of implicit, explicit, imex without recompiling (which we don't > have currently) for the case with no mass matrix. With a mass matrix, unless > we use mass lumping and have a TSSetMassMatrix() you cannot switch to full > explicit, but that is due to mathematics, not the interface.
Who in reality has a problem that looks like u_t = f(u) + g(u) + h(u) where it may make sense to move some of this to the left (implicit)? I'm concerned that this isn't natural for many applications so adding an interface would be solving a problem that doesn't really exist outside perhaps a few academic examples.
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