sympy/sympy — pull request #1420 by Krastanov (2012-07-15 01:03:38+00:00)
Title: differential geometry

This is just so the work is not only in my personal repository and can be easily reviewed. The previous pull request is contained here so I will close it (there is no nice functional separation between the two).

This is mostly selfcontained tested and documented. I have a bunch of other changes that are in an ugly state. I will push them when I get them cleaned and squashed (tomorrow probably).

What is of interested:

- new and very simplified class structure that permits some tricks not present in the Scheme implementation
- tests for adherence to some of the protocols expected from Basic subclasses
- added a predefined R^3 manifold just to have some more testcases
- finally a well documented (in the tests) list of failing trigsimp expressions (I have looked at the new assumption module. I will rely heavily on it and probably extend it a bit)