Trying to find local TDof number of Global TDof

[JacobLotz]

I am trying to find the local TDof number of a global Tdof.
In my ParFiniteElementSpace I have 108 global Tdofs which are distributed over two processes, giving a total of 126 global dofs (63 per proces). Of these global Tdofs I want to know if they are in the current proces and what their local true number is.

If I know the global Dof I can get the local TDof number using: int GetLocalTDofNumber(int ldof) const;

However, in order to do this, I first have to find the global Dof. I have the idea that I can do this using Dof_TrueDof_Matrix() but I am not sure if this is the correct procedure or there is an easier procedure.

Does anyone have suggestion?

[v-dobrev]

You can check the global tdof index against the global tdof offset for the current rank which you can get from the method

   HYPRE_BigInt ParFiniteElementSpace::GetMyTDofOffset() const;

Basically the global tdof index is the sum of the global tdof offset plus the local tdof index. The last global tdof index on the current rank is: my_global_tdof_offset + ParFiniteElementSpace::GetTrueVSize() - 1.

[JacobLotz]

Thank you! This is exactly what I needed!