---
title: "Magma V2.13-10 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.13-10.html"
source: "https://docs.magma-maths.org/patchnotes/2.13-10.md"
---

<a id="magma-v2-13-10-patch-notes"></a>
# Magma V2.13-10 Patch Notes

## Coding Theory

- Some bugs in the computation of the minimum Lee weight for codes over $\mathbb{Z}_4$ have been fixed.

## Groups

- A bug in the reconstruction of p-group automorphisms on a second call to `AutomorphismGroup` has been fixed. Bug reported by Derek Holt.
- Internal errors when the [`BlocksAction`](../FiniteGroups/PermutationGroups/actions.md#function-blocksaction-grpperm-any) routine for permutation groups was given an incorrect block system have been trapped. Bug reported by Derek Holt.
- A crash when [`IntegralGroup`](../FiniteGroups/MatrixGroupsOverQAndZ/Others.md#function-integralgroup-grpmat) was given an infinite group argument has been fixed. This now gives a runtime error. Bug reported by Markus Grassl.

## Interpreter

- A bad leak in the [`eval`](../MagmaLanguage/StatementsAndExpressions/eval-expression.md#literal-literal-eval-eval-expression) operator has been fixed. Reported by D. Holt.

## Local Rings

- A bug that could cause some parentheses to be omitted when printing polynomials over some local rings has been fixed. Reported by J. Voight.

## Matrices

- A bug in `KernelMatrix` for matrices over multivariate polynomial rings over the integers and having zero rows has been fixed. Reported by Andreas-Stephan Elsenhans.

## Modules

- Missing checks for matrix spaces over rings with zero divisors have been inserted.

## Monoids

- A crash when using a monoid with generator names assigned has been fixed. Bug reported by Klaus Brockhaus.

## Number Fields

- Zeroes for orders and number fields returned the zeroes with not enough precision in the wrong ring (old reals).
- The embedding from cyclotomic fields, number fields and quadratic fields into real and complex fields was ignoring the precision of the target ring, the internal number field precision was used.
- An internal bug for user created prime ideals in relative extensions that could result in internal errors when the residue class fields of those ideals are used, has been fixed.
- A bug in indexform equations in arbitrary orders of cubic fields that would, in some cases, trigger an internal error has been fixed.

## Polynomial Rings

- Localization for univariate polynomial rings over the rationals did not work when wrong arguments were being passed to it.
- `Localization``(RngMPol, RngMPol)` is now implemented.
- Bugs in computing the squarefree factorization of polynomials over non-perfect fields have been fixed.

## Residue Class Rings

- Any rational may now be coerced into `Integers``(1)`.