M1 Mathematics, 2011-2012
MM26E Numerical Approximation of PDEs
Hervé Le Dret
$P_2$-Lagrange approximation
First of all, the $P_2$ shape functions.
A shape function corresponding to a vertex
A shape function corresponding to the middle of an edge
Next, a very coarse mesh of a disk.
Then the hat-functions of $P_2$-Lagrange approximation on this mesh.
A hat-function corresponding to an internal vertex
A hat-function corresponding to an internal middle of an edge
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