[petsc-users] nonlinear eigenvalue problem with structured mesh

Gideon Simpson gideon.simpson at gmail.com
Mon Jul 6 19:43:28 CDT 2015

I have a nonlinear eigenvalue problem for a system of equations, of the form, 

-Delta u + f(u) = E * u,

where E is my nonlinear eigenvalue parameter, and u and f are vector valued.  

I thus have the following two things to contend with:

1.  E is a scalar which needs to be distributed across all the processes when the right hand side is formed

2.  I would like to be able to use a da to manage the spatial and multicomponent nature of u

Obviously the Vec that my nonlinear solver is going to search for has to store both bits of data.  Is there a clever petsc way to handle this, or will I need to do all the indexing and broadcasting by hand?


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