I have worked with the 7-point star stencil and the 27-point Box stencil. Each goes out from its center +- 1 position in i,j,k.
I have a 13-point star stencil (4th order) which goes out +- 2 positions from its center in i,j,k. Can I use this in the PETSc ? Do I have to do something different than what is done with smaller conventional stencil’s? Respectfully John
