Simulink's Solver

Simulink from Mathworks is a platform for multidomain simulation and mode-based
design of dynamic systems. After building your model in Simulink one can simulate its
dynamic behavior and view the results live. Simulink provides several features and tools
to ensure the speed and accuracy of simulation. These are fixed- and variable-step
solvers and a graphical debugger.

Solvers are numerical integration algorithms that compute the system dynamics over
time using information contained in the model. Simulink provides solvers to support the simulation of a broad range of systems, including continuous-time (analog),
discrete-time (digital), hybrid (mixed-signal), and mutirate systems of any size.

These solvers can simulate stiff systems and systems with state events, such as
discontinuities, including instantaneous changes in system dynamics. While specifying
simulation options, one can also select the type and properties of these solvers.