Open patrick-kidger opened 3 years ago
@patrick-kidger are we still interested in Verlet methods (or other methods specifically taylored to Hamiltonian systems)?
Absolutely! I just haven't gotten around to implementing them. I'd be happy to take a PR on these.
@patrick-kidger I'm not able to properly initialise a KenCarp solver? Can you help me? Is something like ?
KenCarp4(MultiTerm([Bosh3, Kvaerno3]))
But when I use it to solve an ODE I got:
ValueError: terms
must be a PyTree of AbstractTerms
(such as ODETerm
), with structure diffrax.term.MultiTerm[typing.Tuple[diffrax.term.AbstractTerm, diffrax.term.AbstractTerm]]
Can you please provide an entire example on how use the IMEX solvers?
For example:
explicit_term = ODETerm(lambda t, y, args: -y)
impliict_term = ODETerm(lambda t, y, args: -y)
terms = MultiTerm(explicit_term, implicit_term)
solver = KenCarp4()
diffeqsolve(terms, solver, ...)
SDE:
Implict:
DAE:
made_jump=True
ifdconstraint/dz=0
Symplectic:
Other: