Stability Mountains for Fredebeul's Formulas

Here we analyze the three methods from Christoph Fredebeul, which were mentioned in Albrecht (1989) . These are three cyclic linear multistep methods of order $p=3$ and $p=4$. They should not to be confused with the A-BDF from Fredebeul. Bibliography. Peter Albrecht: “ Elements of a General Theory of Composite Integration Methods ”, Applied Mathematics and Computation, Vol. 31, May 1989, pp. 1–17…