---
title: "Magma V2.12-13 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.12-13.html"
source: "https://docs.magma-maths.org/patchnotes/2.12-13.md"
---

<a id="magma-v2-12-13-patch-notes"></a>
# Magma V2.12-13 Patch Notes

## Extensions of Rings

- The `LCM` of ideals of number fields and function fields has been improved.
- The simplification of elements in relative extensions was wrong in rare circumstances, which could have produced wrong results in set based operations. Bug reported by M. Grassl.
- `SwapExtension` for rings produced an error when the smaller extension was defined by a non-monic polynomial.
- A problem coercing low precision elements into ramified p-adic fields has been fixed.

## Graphs

- Assigning of zero labels has been fixed.
- An ambiguous signature match error when using Contract has been fixed.

## Groups

- A group of order 962280 has been added to the perfect group database. Lower degree permutation representations have been found for 3 other groups. Updates supplied by Derek Holt.

## Strings

- A check for overflow in cat has been inserted (bug reported by M. Grassl).