14. Preconditioning

There are several NGSolve-tutorial dealing with using and building preconditioners

14.1. i-tutorials: You know the theory, want to know how to implement

• Schwarz methods

• Element-wise BDDC

• Auxiliary Space Preconditioning

14.2. i-FEM: teaching material

• Commuting AMG

14.3. Treasure trove:

• Matrix-free high order