Fengine

Engine for building and solving PDE using finite elements method

e. g.:

$$-\text{div(}\lambda\text{grad} u) + \gamma u = f$$

or

$$-\text{div(}\lambda\text{grad} u) + \chi \frac{\partial^2 u}{\partial t^2} + \sigma \frac{\partial u}{\partial t} = f$$