SymPy 0.5.12 released

Quite a lot has changed, SymPy now works with NumPy arrays, you can convert back and forth using numpy.array() and sympy.Matrix(). The integration algorithm has been improved significantly, it can handle a lot of common integrals already (some examples).

More detailed changelog:

• SymPy works with NumPy out of the box (commit 1, 2)
• RootOf implemented (commit)
• Lambda support works now (commit)
• heuristic Risch method improved (commit 1, 2, 3, 4, 5)
• cancel function implemented (commit)
• sqrt(x) is now equivalent to x**(1/2) (commit 1, 2)
• Derivative is now unevaluated (commit)
• list2numpy() implemented (commit)
• series expansion of hyperbolic functions fixed (commit)
• sympify('lambda x: 2*x') works, plus other fixes (commit 1, 2, 3)
• simple maxima parser implemented (commit)
• sin(x)[0] idiom changed to sin(x).args[0] (commit)
• sin(x).series(x, 5) idiom changed to sin(x).series(x, 0, 5) (commit)
• caching refactored (commit 1, 2, 3, 4, 5, 6, 7, 8, 9)
• 2D plots now don't rotate in 3D, but translate instead (commit)
• many bug fixes, see the Mercurial history for details

The following people have contributed to this release:

• Kirill Smelkov
• Mateusz Paprocki
• Fredrik Johansson
• Jaroslaw Tworek
• Saroj Adhikari
• Andrej Tokarčík
• David Marek
• Or Dvory
• Bernhard R. Link
• Ondřej Čertík