an encyclopedia of finite element definitions

an encyclopedia of finite element definitions

- \(R\) is the reference triangle. The following numbering of the subentities of the reference is used:
- \(\mathcal{V}\) is spanned by: \(1\), \(x\), \(y\)
- \(\mathcal{L}=\{l_0,...,l_{2}\}\)
- Functionals and basis functions:

\(\displaystyle l_{0}:v\mapsto v(\tfrac{1}{2},\tfrac{1}{2})\)

\(\displaystyle \phi_{0} = 2 x + 2 y - 1\)

This DOF is associated with edge 0 of the reference element.

\(\displaystyle \phi_{0} = 2 x + 2 y - 1\)

This DOF is associated with edge 0 of the reference element.

\(\displaystyle l_{1}:v\mapsto v(0,\tfrac{1}{2})\)

\(\displaystyle \phi_{1} = 1 - 2 x\)

This DOF is associated with edge 1 of the reference element.

\(\displaystyle \phi_{1} = 1 - 2 x\)

This DOF is associated with edge 1 of the reference element.