Dear Sir or Madam, I am a student of the University of Macau, I am trying to learn PETSc and I have two questions about the TSIRK.
1.PETSc 3.16.0 adds “irk" for the TSType and it offers many options like TSIRK1BEE, TSIRK2C, TSIRK2D, TSIRK2E, TSIRK3, TSIRKL2, I am not sure how to use them and if only Gaussian points can be used (Radau or Labatto may not offered). 2.Maybe there is a similar option to implement the fully implicit Runge-Kutta methods in PETSc 3.15 or other previous versions? For example, if I want to solve a time dependent problem with a butcher table like below, do I need to input it by myself? [cid:CF3DAFB6-6115-45C2-BEE4-0ADCA66709BB] Thank you very much for your help. Best regards, Wang Jing-Yuan
