Total number of gauss point

[dokken]

The number of Gauss-points used depends on the variational form.
DOLFINx uses ufl to estimate the quadrature degree of the variational form, see:

How to obtain the Gauss quadrature degree estimated by the form compiler

Note that the demo you are considering is quite outdated, and your should consider the latest version To estimate the polynomial degree, you can use: from ufl.algorithms.compute_form_data \ import estimate_total_polynomial_degree estimate_total_polynomial_degree(form)

This is in turn sent to basix which tabulates at the relevant points.

You can use basix directly to investigate the default quadrature of any order, see:Creating and using a quadrature rule — Basix 0.8.0.0 documentation

You can also by-pass the basix/ufl workflow by supplying your own quadrature rule:

FEniCS/ffcx/blob/4f7dced37edfaf283d2d69228921cb2bedeb027b/test/test_jit_forms.py#L426-L429