Level 4: Advanced numerical schemes

Collaboration diagram for Level 4: Advanced numerical schemes:

Modules
	Advection terms
	\( \vec v \cdot \nabla u\) and \( \{ f,g\} \)
	Elliptic operators
	Elliptic \( -\nabla\cdot (\chi \nabla f)\) and Helmholtz \( (\chi + \alpha \Delta) f\).
	Multigrid matrix inversion
	\( A x = b\)

Detailed Description

These routines make use of both the basic operations as well as the interfaces defined in the Geometry section.