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Magma V2.26-9 Patch Notes

Patch release for Magma V2.26-9. Updated areas: Algebraic Number Fields, Arithmetic Geometry, Galois Theory, Group Theory, Hyperelliptic Curves and 4 more.

9 areas

Algebraic Number Fields

  • A crash in MaximalOrder for number fields where the defining polynomial is either non-monic or non-integral has been fixed. Reported by M. Grassl.

Arithmetic Geometry

  • A problem that occurs when unstable curves are input to intrinsics such as TernaryFormPotentiallyUnstablePrimes and MinimizeReduce which call it has been fixed by A.-S. Elsenhans.

  • A crash in PointSearch where the number of minors of the Jacobian matrix is too large has been fixed. Reported by B. Nasserden.

Galois Theory

  • A small improvement has been made to prime selection when computing the Subfields of an algebraic function field represented as an extension of another algebraic function field.

Group Theory

  • A bug in MaximalSubgroups applied to groups with a composition factor PSL(3,p^2) has been fixed. Bug reported by P. Mueller as a bug in IsMaximal for permutation groups.

  • Calculating the order of matrix groups of classical type has been improved by using classical recognition algorithms.

Hyperelliptic Curves

Invariant Theory

  • An bug causing an incorrect (non-minimal) result in FundamentalInvariants has been fixed. Reported by U. Thiel.

Lattices

  • A crash in CloseVectors has been fixed. Reported by M. Kirschmer.

Matrices

  • A bug in InvariantFactors for matrices over small finite fields has been fixed. Reported by G. Thomas.

Representation Theory

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