Matthew Knepley <[email protected]> writes: > On Tue, Oct 5, 2021 at 12:42 AM Wang Jingyuan <[email protected]> > wrote: > >> 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, >> > > The types you mention above do not exist. For instance, the first one > "TSIRK1BEE" is actually > https://petsc.org/main/docs/manualpages/TS/TSARKIMEX1BEE.html
As Ed Bueler has commented, these non-existent types are incorrectly listed in the man page (people like me missed those copy/paste remnants during code review). https://petsc.org/main/docs/manualpages/TS/TSIRK.html The 1BEE and related types are diagonally implicit, so don't make sense under TSIRK. We would like to add Radau and Lobatto methods to PETSc -- it would be a relatively easy contribution.
