Add an interface for debugging the implicit solver Jacobian #2730
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Purpose
This PR splits the
ImplicitEquationJacobian
into anApproxJacobian
, anExactJacobian
, and aDebugJacobian
. The first option is the Jacobian approximation we've been using until now, while the second option is an exact Jacobian computed usingForwardDiff
and inverted using column-wise LU decomposition. The third option can act like either of the other two, and it checks the approximation against the exact computation whenever the exact Jacobian is updated.This PR also gets rid of some outdated code related to
OrdinaryDiffEq
in order to simplify the interface design.To-do
Add some working examples to CI.
Content