---
title: "Magma V2.29-4 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.29-4.html"
source: "https://docs.magma-maths.org/patchnotes/2.29-4.md"
---

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# Magma V2.29-4 Patch Notes

## Algebraic Number Fields

- A crash when applying an isomorphism of number fields has been fixed.  Reported by Sachi Hashimoto.

## Commutative Algebra

- An incorrect result in `PrimaryDecomposition` for multivariate ideals in very small characteristic has been fixed.  Reported by Yongyuan Huang.
- A hang in the La Scala free resolution algorithm applied to a certain large graded module has been fixed.  Reported by George Kirkup.

## Hyperelliptic Curves

- The `IsIsomorphic` function has been fixed to correctly handle degenerate cases of hyperelliptic curves (genus 0 and genus 1). Reported by Sachi Hashimoto.

## Polynomial Rings

- An error has been fixed which would cause the incorrect decoding of the Magma-level printing for `B.1` where `B` is a boolean polynomial ring with between 5 and 32 variables (inclusive).

## Quaternion Algebras

- The functions `IsIsomorphic` and [`IsMatrixRing`](../Algebras/QuaternionAlgebras/matrix-ring-test.md#function-ismatrixring-algquat) are now supported for quaternion algebras defined over finite fields.

## Rational Curves and Conics

- An `IsIsomorphic` function has been added to check whether two conic curves are isomorphic, and to return the corresponding isomorphism.

## Strings

- Grammar has been fixed for error messages when a string does not represent a number in a given base. Reported by David Roe.