These are the release notes for SymPy 1.13.1. You can also find release notes for previous versions.

SymPy 1.13.1 was released on the 19th July 2024.

This version of SymPy has been tested on Python 3.8, 3.9, 3.10, 3.11, 3.12 and PyPy. See our Python version support policy for more information on when we plan to drop support for older Python versions.

Install SymPy with

pip install -U sympy

or if you use Anaconda

conda install sympy

There are not many changes in 1.13.1 (see below).

• matrices

  • Matrix.inv() now uses exact rational coefficients internally for matrices of polynomials or rational functions if the matrix has symbolic expressions with float coefficients. This fixes an issue first seen in SymPy 1.13.0 where unnecessarily large floats were present in the expressions for the matrix inverse (https://github.com/sympy/sympy/issues/26821) and likely also prevents Matrix.inv from returning some inaccurate results for some matrices containing floats. (#26833 by @oscarbenjamin)

• physics.vector

  • A bug in pretty printing of vectors was fixed. A regression in 1.13.0 means that an exception would be raised when printing the zero vector. (#26805 by @oscarbenjamin)

• polys

  • Fix GF with Integer argument. A regression in 1.13.0 meant that when the ground types are flint GF(3)(Integer(2)) would raise an exception. (#26802 by @J08nY and @oscarbenjamin)

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