pkgsrc-Changes archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

CVS commit: pkgsrc/math/py-sympy

Module Name:    pkgsrc
Committed By:   wen
Date:           Sun Dec  2 12:33:24 UTC 2012

Modified Files:
        pkgsrc/math/py-sympy: Makefile PLIST distinfo
        pkgsrc/math/py-sympy/patches: patch-aa

Log Message:
Update to 0.7.2

Upstream changes:
Release Notes for 0.7.2New Page Edit Page Page History
These are the release notes for SymPy 0.7.2. SymPy 0.7.2 was released on 
October 16, 2012.

Major Changes
Python 3 support

SymPy now supports Python 3. The officially supported versions are 3.2 and 3.3, 
but 3.1 should also work in a pinch. The Python 3-compatible tarballs will be 
provided separately, but it is also possible to download Python 2 code and 
convert it manually, via the bin/use2to3 utility. See the README for more

PyPy support

All SymPy tests pass in recent nightlies of PyPy, and so it should have full 
support as of the next version after 1.9.


A new module called Combinatorics was added which is the result of a successful 
GSoC project. It attempts to replicate the functionality of Combinatorica and 
currently has full featured support for Permutations, Subsets, Gray codes and 
Prufer codes.

In another GSoC project, facilities from computational group theory were added 
to the combinatorics module, mainly following the book "Handbook of 
computational group theory". Currently only permutation groups are supported. 
The main functionalities are: basic properties (orbits, stabilizers, random 
elements...), the Schreier-Sims algorithm (three implementations, in increasing 
speed: with Jerrum's filter, incremental, and randomized (Monte Carlo)), 
backtrack searching for subgroups with certain properties.

Definite Integration

A new module called meijerint was added, which is also the result of a 
successful GSoC project. It implements a heuristic algorithm for (mainly) 
definite integration, similar to the one used in Mathematica. The code is 
automatically called by the standard integrate() function. This new algorithm 
allows computation of important integral transforms in many interesting cases, 
so helper functions for Laplace, Fourier and Mellin transforms were added as 

Random Variables

A new module called stats was added. This introduces a RandomSymbol type which 
can be used to model uncertainty in expressions.

Matrix Expressions

A new matrix submodule named expressions was added. This introduces a 
MatrixSymbol type which can be used to describe a matrix without explicitly 
stating its entries. A new family of expression types were also added: 
Transpose, Inverse, Trace, and BlockMatrix. ImmutableMatrix was added so that 
explicitly defined matrices could interact with other SymPy expressions.


A number of new sets were added including atomic sets like FiniteSet, Reals, 
Naturals, Integers, UniversalSet as well as compound sets like ProductSet and 
TransformationSet. Using these building blocks it is possible to build up a 
great variety of interesting sets.

Classical Mechanics

A physics submodule named machanics was added which assists in formation of 
equations of motion for constrained multi-body systems. It is the result of 3 
GSoC projects. Some nontrivial systems can be solved, and examples are provided.

Quantum Mechanics

Density operator module has been added. The operator can be initialized with 
generic Kets or Qubits. The Density operator can also work with TensorProducts 
as arguments. Global methods are also added that compute entropy and fidelity 
of states. Trace and partial-trace operations can also be performed on these 
density operators.

To enable partial trace operations a Tr module has been added to the core 
library. While the functionality should remain same, this module is likely to 
be relocated to an alternate folder in the future. One can currently also use 
sympy.core.Tr to work on general trace operations, but this module is what is 
needed to work on trace and partial-trace operations on any 
sympy.physics.quantum objects.

The Density operators, Tr and Partial trace functionality was implemented as 
part of student participation in GSoC 2012

Expanded angular momentum to include coupled-basis states and product-basis 
states. Operators can also be treated as acting on the coupled basis (default 
behavior) or on one component of the tensor product states. The methods for 
coupling and uncoupling these states can work on an arbitrary number of states. 
Representing, rewriting and applying states and operators between bases has 
been improved.

Commutative Algebra

A new module agca was started which seeks to support computations in 
commutative algebra (and eventually algebraic geometry) in the style of 
Macaulay2 and Singular. Currently there is support for computing Groebner bases 
of modules over a (generalized) polynomial ring over a field. Based on this, 
there are algorithms for various standard problems in commutative algebra, 
e.g., computing intersections of submodules, equality tests in quotient rings, 

Plotting Module

A new plotting module has been added which uses Matplotlib as its back-end. The 
plotting module has functions to plot the following:

2D line plots
2D parametric plots.
2D implicit and region plots.
3D surface plots.
3D parametric surface plots.
3D parametric line plots.
Differential Geometry

Thanks to a GSoC project the beginning of a new module covering the theory of 
differential geometry was started. It can be imported with sympy.diffgeom. It 
is based on "Functional Differential Geometry" by Sussman and Wisdom. Currently 
implemented are scalar, vector and form fields over manifolds as well as 
covariant and other derivatives.

To generate a diff of this commit:
cvs rdiff -u -r1.12 -r1.13 pkgsrc/math/py-sympy/Makefile
cvs rdiff -u -r1.7 -r1.8 pkgsrc/math/py-sympy/PLIST
cvs rdiff -u -r1.6 -r1.7 pkgsrc/math/py-sympy/distinfo
cvs rdiff -u -r1.5 -r1.6 pkgsrc/math/py-sympy/patches/patch-aa

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Home | Main Index | Thread Index | Old Index