---
title: "Magma V2.21-10 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.21-10.html"
source: "https://docs.magma-maths.org/patchnotes/2.21-10.md"
---

<a id="magma-v2-21-10-patch-notes"></a>
# Magma V2.21-10 Patch Notes

## Aggregates

- A crash when merging sets with unusual universes has been fixed. Reported by T. Feng.

## Algebraic Curves

- A runtime error for certain examples of [`RegularModel`](../AlgebraicGeometry/AlgebraicCurves/arith.md#function-regularmodel-crv-any) has been fixed. Reported by A. Sutherland.
- An internal error in `GapNumbers` given a divisor and a place of a curve has been fixed.

## Finite Fields

- A crash which would sometimes arise when creating a large lattice of finite fields of the same characteristic has been fixed. There is also a general speedup when many default fields of the same characteristic are created in succession.

## LLL Reduction

- An occasional error with precision at the 53-bit cusp was fixed. Reported by M. Kirschmer.

## Matrices

- A crash in `CharacteristicPolynomial` for matrices has been fixed.  Reported by M. Kirschmer.

## Number Fields

- An internal error in `ClassNumber`($D$) for $D$ in the sieve range has been fixed.  Note: there was no error for `ClassGroup`, etc.
- A runtime error in the map returned by `PicardGroup` in some cases has been fixed.  Reported by S. Marseglia.

## p-adic Matrices

- A problem with precision when computing determinants of p-adic matrices was fixed.