# Non-symmetric (Elliptic)

This example uses a nonsymmetric equation and its purpose is to
check that nonsymmetric problems are solved correctly.

## Model problem

Equation solved:

(1)

Domain of interest: Square domain .

Right-hand side:

(2)

## Exact solution

(3)

Boundary conditions: Zero Dirichlet on left edge, zero Neumann on top and bottom edges,
nonzero Neumann on the right edge (all matching exact solution).

## Convergence comparison

Final mesh (h-FEM with linear elements):

Final mesh (h-FEM with quadratic elements):

Final mesh (hp-FEM):

DOF convergence graphs:

CPU time convergence graphs: