What types of function space can be used in fenics if the 'CG' type cannot fit well due to Runge phenomenon?

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1

What types of function space can be used in Fenics if the ‘CG’/‘Lagrange’ type cannot fit well due to Runge phenomenon?

2

See:
https://docs.fenicsproject.org/dolfinx/v0.6.0/python/demos/demo_lagrange_variants.html

3

Thanks! But I forgot to mention that I am using Dolfin. I tried to search lagrange in the old doc and book, but did not find similar contents about lagrange variants like that in Dolfinx. Is there anything like lagrange variants in Dolfinx?

4

Variants is not part of legacy Dolfin. It was introduced in DOLFINx when FIAT was switched out for Basix.

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