Here the ODE solvers available in PathSim are defined. They all inherit from the bas Solver class defined in _solver.py. Then there is the distinction between implicit and explicit solvers through the classes ExplicitSolver and ImplicitSolver. Different kinds of methods have their internal workings defined in additional classes, such as eplicit runge-kutta methods in _rungekutta.py with ExplicitRungeKutta inheriting from ExplicitSolver, and DiagonallyImplicitRungeKutta inheriting from ImplicitSolver. There are also some multistep methods such as GEAR and BDF defined in their respective modules.

Solvers can be imported directly from the solver library like this:

from pathsim.solvers import EUF, RKCK54

Or from the modules where they are defined:

from pathsim.solvers.euler import EUF
from pathsim.solvers.rkck54 import RKCK54