PEEI 4.0.0.1 software provides numerical solutions for all solvable partial differential equations systems.

Users can now choose between two different resolution methods labeled 'normal method' and 'other method.' The 'normal method' is similar to that of the previous versions, but with an improved performance and termination criterion. The 'other method' uses 'interval analysis' and offers the benefit of calculating the best solution while being generally slower.
The program's activation process has also been enhanced. It requires monthly reactivation but is entirely free for unlimited personal and business use. Additionally, the reactivation process is now automatic and free with a simple click of a button.
Version 4.0.0.1: N/A