> I'm wondering if it's possible/straightforward to have per-cell quadrature
> weights? I want to keep the quadrature positions the same but update the
> quadrature weights.

If you only have a few different sets of quadratures, I would think
having one fe_values object for each quadrature might be an easy
solution.

If not, here is something else to try:
I think none of the data inside fe_values except .JxW() depends on the
quadrature weights, just the locations. So to change the weights you
could use

fe_values.JxW(q)/old_weight[q]*new_weight[q]

instead of

fe_values.JxW(q)

There are a few exceptions like get_function_values() that depend on
the quadrature weights, but if you only want to do assembly, this hack
should work.

-- 
Timo Heister
http://www.math.clemson.edu/~heister/

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