[petsc-users] When to perform PETSc.Vec assembly with petsc4py

[SCOTTO Alexandre]

Dear PETSc community,

As a beginner in the MPI world and with the PETSc library, I come with a possibly very naive question.
I know from the documentation that assembling vectors must be done, but it is not clear to me when to perform this operation.
Is there a simple way to know when a vector need be assembled and when it is not?

Thanks in advance.
Regards,
Alexandre.
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