[petsc-users] Questions about TS

[Sean Farley]

>
> Is it right to think of the division between ODE, DAE and IMEX in the
> documentation as Fully Explicit vs. Fully implicit vs. Semi-implicit?
>

Mostly, yes. Indeed, we made 'shortcuts' such as "if the user provides no
IFunction, then treat it as udot = F(u,t)" and "if the user provides no RHS,
then treat it as G(udot, u, t) = 0."
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