PETSc version 3.15.5

TSROSW4L

four stage, fourth order Rosenbrock (not W) method By default, the Jacobian is only recomputed once per step.

A-stable and L-stable

This method does not provide a dense output formula.

- Hairer and Wanner, Solving Ordinary Differential Equations II, Section 4 Table 7.2.

Hairer's code ros4.f

intermediate