---
title: "Magma V2.25-5 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.25-5.html"
source: "https://docs.magma-maths.org/patchnotes/2.25-5.md"
---

<a id="magma-v2-25-5-patch-notes"></a>
# Magma V2.25-5 Patch Notes

## Algebraic Number Fields

- Determining whether an element of a number field is an $n$th power has been made more efficient.  Reported by M. Grassl.
- Calculating a `MaximalOrder` given `Discriminant` or `Ramification` parameters has been improved. Reported by L. Dembélé.

## Algebraic Number and Function Fields

- A bug in coercion of number field and function field elements into coefficient rings in a tower has been fixed. Reported by M. Grassl.

## Coding Theory

- An error message for `CyclicCode` has been fixed to refer to the correct argument number.  Reported by A. Previtali.

## Commutative Algebra

- A bug in [`EquidimensionalPart`](../CommutativeAlgebra/PolynomialRingIdealOperations/radical-decomposition.md#function-equidimensionalpart-rngmpol) has been fixed.  Reported by G. Blanco.

## Galois Groups

- A bug in `GaloisGroup` has been fixed. Reported by J. Barker and M. Soderholm.

## Groups

- A crash when computing the soluble radical of a matrix group over a finite field has been fixed.
- The position of the second column when printing conjugacy classes or a subgroup lattice has been slightly modified in some cases.
- An bug in `Centre` for p-groups has been fixed.  Reported by H. Dietrich.

<a id="i-o"></a>
## I/O

- The undocumented intrinsics `SetLinePrefix` and `GetIndentLevel` have been removed.
- User indentation is no longer ignored if screen columns is 0, and may now exceed the screen columns.
- Fixed a bug with pipes on OS X, that could cause [`POpen`](../MagmaLanguage/InputOutput/io.md#function-popen-monstgelt-monstgelt) to return a pipe that incorrectly re-used internal data of a previous [`POpen`](../MagmaLanguage/InputOutput/io.md#function-popen-monstgelt-monstgelt) call.  Reported by U. Thiel.

## Maps

- Map application has been fixed so that automatic coercion into the domain is avoided when the input is a sequence of elements in the domain itself.  Issue reported by G. Blanco.

## Numerical Algebra

- A crash in [`NumericalSolution`](../MatricesLinearAlgebra/Matrices/numerical-linalg.md#function-numericalsolution-mtrx-rngrecom-mtrx-rngrecom) for non-trivial matrices has been fixed.  Reported by D. Barth.

## Polynomial Rings

- The `&*` operator, when applied to univariate polynomials of the same degree, has been sped up.  Issue reported by M. Monagan.
- A bad slow-down in polynomial factorization over finite fields when there are a very large number of factors has been fixed. Reported by M. Monagan.
- The Shoup-based algorithm for polynomial factorization over finite fields has had some further speedups.

## Representation Theory

- A crash in [`BrauerCharacter`](../RepresentationTheory/CharactersOfFiniteGroups/brauer-characters.md#function-brauercharacter-algchtrelt-rngintelt) for trivial modules has been fixed.

## Schemes

- It is now possible to construct a map between a projective scheme and an affine scheme with one of the defining polynomials being 0. Reported by A. Laface.