[petsc-users] Implementing FEM with PLEX/DS/SNES

[zakaryah]

Hi Matt,

> Can you explain more about this source term? It sounds like a bunch of
>> > delta functions. That
>> > would still work in this framework, but the convergence rate for a rhs
>> > with these singularities
>> > is reduced (this is a generic feature of FEM).
>>
>
Can you elaborate on this, or suggest references?  In the context of
elasticity, does this mean that convergence for problems using node forces
us generally worse than with the equivalent body forces?  Thanks!

>
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