# Status of the Diophantine module

Hi All,

In my project proposal for a Diophantine equation for SymPy, I mentioned the following five deliverables.

1. Linear Diophantine equation :

I implemented solutions for linear diophantine equations, you can access this functionality through `diop_linear()`.

2. Simplified Pell equation, :

Not only I implemented solutions for simplified Pell equation, I completely solved the general binary quadratic equation .

3. The equation, :

I implemented solutions for more general ternary quadratic equation .

4. Extended Pythagorean equation, :

I implemented solutions for slightly more general equation .

5. General sum of squares, :

This is a computationally hard problem and method I implemented finds only one solution. It’s quick and work for large but not complete. I also implemented a brute force version which finds all the solutions but it doesn’t work for larger .

- Posted in: GSoC-2013-SymPy

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