---
title: "Magma V2.10-9 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.10-9.html"
source: "https://docs.magma-maths.org/patchnotes/2.10-9.md"
---

<a id="magma-v2-10-9-patch-notes"></a>
# Magma V2.10-9 Patch Notes

## Geometry

- An error in the `Chabauty` function for hyperelliptic curves has been fixed. The problem is exhibited with the example: `J := Jacobian(HyperellipticCurve(2*x^6 - x^4 - 2*x^3 - 2*x^2 + 2*x - 3)); D := elt<J | x^2 + 2/79*x - 181/79,3045/6241*x - 20521/6241, 2>; Chabauty(D,7);`
- An error in `MordellWeilGroup` of an elliptic curve has been fixed. This could cause a crash if the group of another elliptic curve had been previously calculated and certain other conditions also held.

## Incidence Structures

- A small improvement in subgraph construction: support and labels are now transferred from the supergraph to the subgraph.
- A bug arising when deleting graphs has been fixed.

## Rings and Fields

- Some small improvements and bug fixes have been made in the automatic coercions between various p-adic rings and fields.
- A bug in GaloisImage for $p\ge 5$ has been fixed.

## System

- The memory management code for the Linux version has been rewritten, to work around a limitation of the Linux architecture, which previously restricted Magma to approximately 800 MB of system memory. Magma should now be able to access as much memory as possible.
- A memory leak caused when nested aggregate structures (such as sequences of tuples) were passed to procedures that modified them has been fixed.