[petsc-users] Boundary condition IS

[Mohammad Hassan Baghaei]

Hello

I am using DMPlex to construct a fully circular 2D domain for my PDEs. As I
am discretizing the PDEs using finite difference method, I need to know , to
define the layout of PetscSection, how I can find the boundary condition IS.
I know the location of the boundaries in Sieve chart. However, I noticed
that I need to know the Index Set of that location. Can I use the Sieve
point number for Index Set. It seems I think I am not familiar with IS. Can
you help me? Thank for your help. 

Amir

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