[petsc-users] DMPlex. Apply Dirichlet boundary condition

[Josh L]

Hi,

My problem has an irregular domain and for the nodes I have to apply
boundary condition, I only know their node number in nature ordering.
How do I apply BC(zero out the corresponding entries in global Vec and Mat)
after DMPlexDistribute when it is all in global ordering?

If using DMLabel, how do I add those nodes to the label If I only have
their number in nature ordering?


Thanks,
Josh
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