[Dune] what is Dune::MPIHelper::getLocalCommunicator()

[Aleksejs Fomins]

Dear Dune,

A short question. What does Dune::MPIHelper::getLocalCommunicator() do?

The reference says:

"get a local communicator
Returns a communicator to exchange data with the local process only"

But what is a local process?

Regards,
Aleksejs

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