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

public wiki

We created a public wiki:

http://wiki.sympy.org/

That everyone is encouraged to participate in. The google code wiki has a huge disadvantage, that only the members of the google code sympy project are allowed to edit it. wiki.sympy.org can be edited by anyone and we hope that it will encourage SymPy users to help improve SymPy documentation and take part in the project.

We plan to move all tutorials and docs in there. Only things, that are relevant to developers, like how to do a release, etc., will stay in the google wiki.

SymPy 0.5.11 released

This is just a bugfix release, that fixed a problem with pyglet in the 0.5.10.

Changes:

• ./setup.py install installs pyglet correctly now (commit)
• var("k") fixed (commit)
• script for automatic testing of plotting in pure environment added (commit 1, 2)

SymPy 0.5.10 released

Changes:

• view renamed to preview, pngview, pdfview, dviview added (commit)
• latex printer was rewritten, preview uses builtin pyglet instead of pygame (commit 1, 2)
• square root denesting implemented (commit)
• parser of simple Mathematica expressions added (commit)
• TeXmacs interface written (commit)
• some integration fixes (commit 1, 2, 3)
• line width in 2D plotting can be specified (commit)
• README was updated (commit 1, 2)
• pyglet and mpmath were updated and moved to sympy/thirdparty (commit 1, 2, 3, 4, 5)
• all sys.path hacks were moved to just 2 places - pyglet and examples (commit 1, 2, 3)
• SymPy objects should work in numpy arrays now (commit 1, 2)
• hand written sympify() parser was rewritten and simplified using Python AST (commit)

See also Changes.

Google Highly Open Participation Contest 2007-8

SymPy participates in the Google Highly Open Participation Contest 2007-8, if you are a high school student, go for it. Last chance to claim a task is January 22!

SymPy 0.5.9 released

Changes:

* Differential solvers were polished
* isympy now predefines f as a function
* Matrix printing improved
* Printing internals were documented

See Changes for more info.

Blogs

We'll use this blog for official announcements only from now on. Personal opinions will be on people's blogs, all of which are synchronised at planet.sympy.org.

We have implemented some new cool features in the Mercurial repository, so a new release will soon come out.

If you are curious, you can always find what code has been committed here:

http://hg.sympy.org/sympy