---
title: "Magma V2.15-2 Patch Notes"
canonical: "https://docs.magma-maths.org/patchnotes/2.15-2.html"
source: "https://docs.magma-maths.org/patchnotes/2.15-2.md"
---

<a id="magma-v2-15-2-patch-notes"></a>
# Magma V2.15-2 Patch Notes

## Finite Fields

- A problem with parameters for `Coppersmith` has been fixed.  Reported by D. Hansen.

## Geometry

- Two local solubility glitches in dimension 4 for [`IsotropicSubspace`](../LatticesQuadraticForms/QuadraticForms/isotropic.md#function-isotropicsubspace-rngmpolelt) have been fixed. Reported by Michael Harrison. Also, dimension 3 of this function now simply calls the conic code.

## Lattices

- A bug in the construction of sub-lattices of real lattices has been fixed. Reported by W. Kroworsch.

## Matrices

- A bug in matrix multiplication over finite fields has been fixed. Reported by D. Holt.

## Number Fields

- A problem with [`QuadraticClassGroupTwoPart`](../GlobalFields/QuadraticFields/structure_ops.md#function-quadraticclassgrouptwopart-fldquad) (D=-28757364) was fixed. Reported by the maintainer. This also affected [`IsotropicSubspace`](../LatticesQuadraticForms/QuadraticForms/isotropic.md#function-isotropicsubspace-rngmpolelt).

## Polynomial Rings

- Some problems with boolean polynomial rings have been fixed. The function `BooleanPolynomial` has been added.  Reported by M. Grassl.