symfem.elements.argyris

Argyris elements on simplices.

This element’s definition appears in https://doi.org/10.1017/S000192400008489X (Arygris, Fried, Scharpf, 1968)

Classes

Argyris

Argyris finite element.

Module Contents

class symfem.elements.argyris.Argyris(reference: symfem.references.Reference, order: int)

Bases: symfem.finite_element.CiarletElement

Argyris finite element.

property lagrange_subdegree: int

Get the Lagrange subdegree of the element.

This is the degree of the highest degree Lagrange space whose polynomial space is a subspace of this element’s polynomial space.

property lagrange_superdegree: int | None

Get the Lagrange superdegree of the element.

This is the degree of the highest degree Lagrange space whose polynomial space is a superspace of this element’s polynomial space.

property polynomial_subdegree: int

Get the polynomial subdegree of the element.

This is the degree of the highest degree complete polynomial space that is a subspace of this element’s polynomial space.

property polynomial_superdegree: int | None

Get the polynomial superdegree of the element.

This is the degree of the highest degree complete polynomial space that is a superspace of this element’s polynomial space.

names = ['Argyris']

references = ['triangle']

min_order = 5

max_order = 5

continuity = 'C1'

value_type = 'scalar'

last_updated = '2025.12'