https://petsc.org/release/manualpages/DM/VecGetDM/
Note there is also https://petsc.org/release/manualpages/Sys/PetscObjectCompose/ which along with https://petsc.org/release/manualpages/Sys/PetscContainerCreate/ allows you to attach any data you like to a Vec for later access. This approach supports layering your own higher-level vector information on top of regular Vec (it is done this way to support C and old Fortran that don't support inheritance). > On Nov 16, 2023, at 9:02 AM, Carl-Johan Thore <[email protected]> > wrote: > > Hi, > > Given a Vec (or Mat) created at some point with DMCreate..., > is it possible to retrieve from this Vec a pointer to the DM used > to create it? > > (I could perhaps build my own Vec-type on top of PETSc's > which carried with it such a pointer but that doesn't seem like > a good idea) > > Kind regards, > Carl-Johan
