[petsc-users] VecSet and VecAssemblyBegin

[Barry Smith]

   You absolutely should not need to do an assembly after a VecSet. Please post a full reproducer that demonstrates the problem.

  Barry


> On Apr 25, 2025, at 1:23 PM, Derek Teaney via petsc-users <petsc-users at mcs.anl.gov> wrote:
> 
> Hi, 
> 
> I was under the (mistaken) impression that one does not need to due a VecAssemblyBegin etc following a VecSet, e.g. 
> 
>       VecSet(dn_local, 0.);
>       VecAssemblyBegin(dn_local) ;
>       VecAssemblyEnd(dn_local) ;
> 
> Seems to give different results without the Assembly.  
> 
> Thanks for clarifying, 
> 
> Derek
> 
> --
> ------------------------------------------------------------------------
> Derek Teaney
> Professor and Graduate Program Director
> Dept. of Physics & Astronomy
> Stony Brook University
> Stony Brook, NY 11794-3800
> Tel: (631) 632-4489
> Fax: (631) 632-9718
> e-mail: Derek.Teaney at stonybrook.edu <mailto:Derek.Teaney at stonybrook.edu>
> ------------------------------------------------------------------------
> 

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