---
title: "Magma V2.18-10 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.18-10.html"
source: "https://docs.magma-maths.org/patchnotes/2.18-10.md"
---

<a id="magma-v2-18-10-patch-notes"></a>
# Magma V2.18-10 Patch Notes

## Algebraic Number Fields

- Improvements have been made to `GeneratingSubfields` when more precision was required in the computation. This can be avoided by using an alternative method.
- A bug has been fixed in `IsIsomorphic` and `CompositeFields`.

## Commutative Algebra

- An error in `GradedModule` has been fixed.  Reported by C. Quitte.
- An crash in [`MinimalFreeResolution`](../CommutativeAlgebra/InvariantTheory/properties.md#function-minimalfreeresolution-rnginvar) over large finite fields has been fixed.

## Elliptic Curves

- Some runtime errors in [`EightDescent`](../ArithmeticGeometry/EllipticCurvesOverQAndNumberFields/mordell-weil.md#function-eightdescent-crv) occuring in rare examples have been fixed.  Reported by R. Rathbun.

## FP Algebras

- A missing check for too many terms in the product of long elements of FP algebras has been added.  Reported by E. Rowell.

## Galois Groups

- `GaloisData` has been fixed to no longer return a group and sequence of roots in some cases (only the `GaloisData`). Reported by J. Klüners.

## General Local Fields

- Coercion between a local field and its ramified representation has been enabled.
- Construction of local fields by non-monic polynomials has been fixed. Reported by M. Stoll.
- Precision handling has been improved.
- `SuggestedPrecision` is now available for polynomials over local fields.

## Lie Algebras

- The `IsSimple` intrinsic now returns false for a 1-dimensional Lie algebra.
- An infinite loop in `DirectSumDecomposition` (when the field is finite and non-prime) has been fixed.

## Polynomial Rings

- An obscure crash in multivariate polynomial factorization has been fixed.  Reported by A. Kasprzyk.

## Vector Spaces

- A bug in `IsConsistent` for vectors has been fixed.  Reported by R. Zeier.

## p-adic Fields and their Extensions

- Improvements have been made to some handling of elements of $p$-adic fields and extensions where the valuation of the element was greater than the precision of the ring of integers. Printing in precision 1 fields has been fixed.
- The Extensions returned by `Factorization` of a polynomial over a local field have been fixed.  Reported by J. Klüners.
- An error check has been added to `Factorization` of a polynomial over a local field where precision was found to be lacking.