---
title: "Magma V2.23-6 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.23-6.html"
source: "https://docs.magma-maths.org/patchnotes/2.23-6.md"
---

<a id="magma-v2-23-6-patch-notes"></a>
# Magma V2.23-6 Patch Notes

## Abelian Fields

- The [`GenusField`](../GlobalFields/ClassFieldTheory/galois-module-structure.md#function-genusfield-fldab) intrinsic has been corrected in some cases where the original abelian extension is not absolutely abelian. Reported by A. Bartel.

## Algebras

- Constructing sets from orders of algebras has been fixed. Reported by M. Kirschmer.
- A crash in `CompositionFactors` for associative algebras has been fixed.
- An error in element arithmetic in Lie algebras over certain prime finite fields has been fixed.  Reported by S. Garibaldi.

## Analytic Jacobians

- An incorrect answer for [`ToAnalyticJacobian`](../ArithmeticGeometry/HyperellipticCurves/analytic.md#function-toanalyticjacobian-fldcomelt-fldcomelt-anhcjac) at Weierstrass points has been corrected. Reported by J. Sijsling.

## Artin Representations

- A problem with p-adic internal precision and `HenselLift` was fixed. Noted from a bug with of J. Jones.
- A bug involving use of try/catch in `Print` (thus causing errors on traceback) has been fixed. Noted from a bug of J. Jones.

## Conics

- A problem with reducible input was fixed. Reported by J. Voight.

## Groups

- A crash in `AbsolutelyIrreducibleModulesSchur` has been fixed. The crash occurred when the parameters meant that the return sequence was empty. Bug reported by E. O’Brien.

## Hypergeometric Motives

- A problem with a non-integral wild Euler factor was fixed. Reported by J. Jones.

## Language

- It is now recommended that `Print` intrinsics for user-defined objects implement a “Minimal” version that in particular does not use (failing) try/catch constructions. The Magma error handler is unable to handle tracebacks when `Print` is overly complicated, particularly with recursive errors from try/catch then being triggered.

## Local Fields

- Zeroth powers of zero are now 1 instead of an imprecise zero. Reported by J. Tuitman.

## Matrices

- A failure in matrix inversion for certain types of rational matrices has been fixed.  Reported by A. Page.

## Number Fields

- A problem with intersection of number fields has been fixed.
- Computing an order from a sequence of elements in a number field represented as a tower of extensions has been fixed.

## Polynomial Rings

- A problem with polynomial multiplication over non-commutative base rings has been fixed.  Reported by Y. B. Ti.
- A crash with computing roots of polynomials over number fields has been fixed.  E. González-Jiménez.

## Real Numbers

- A problem with epsilonic real/imaginary parts of `Roots` was fixed, so that `IsReal` should now work as previously. Noted from a bug of J. Jones.

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## Real/Complex Linear Algebra

- A problem with subspaces of empty vector spaces has been fixed.