[petsc-users] TSBDF info

Good morning PETSC team, I am looking to implement a fully implicit BDF-DAE solver and I came across the TSBDF object https://petsc.org/release/src/ts/impls/bdf/bdf.c.html#TSBDF . This seems to be exactly what I am looking for, but I still have questions and I can't seem to find much from it in the documentation or the users manual. The key question for me is whether this is implementation is a *Variable Leading Coefficient BDF *or *Fixed-Leading Coefficient BDF* (such as CVODE). This impacts my ability of reusing matrix factorizations. Thank you, -Alfredo -- Alfredo Duarte Graduate Research Assistant The University of Texas at Austin