Integration points

Finite element discretization spaces

Full de Rham complex

The picture below taken from here, displays from left to right:

  • H1−conforming (continuous)
  • H(curl)−conforming (continuous tangential component)
  • H(div)−conforming (continuous normal component)
  • L2−conforming (discontinuous)

The picture also displays from top to bottom the increasing discretization order for the full de Rham complex.

Quesiton

Integration points

Is the right-hand side of the picture above, i.e. L2−conforming (discontinuous), actually showing the equivalent of the integration points discussed on CCX documentation?

Screenshot_20240503_180310

Screenshot_20240503_180241

In mfem you can choose different integration schemes or even code a custom one.
I think the standard in mfem is the gauss legendre.

You would need to compare the integration point coordinates from mfem with the calculix source code to see if they are equivalent.

https://docs.mfem.org/html/intrules_8cpp_source.html

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