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Magma V2.24-6 Patch Notes

Patch release for Magma V2.24-6. Updated areas: Arithmetic Geometry, Groebner Bases, Groups, Integer Ring, Lattices and 2 more.

7 areas

Arithmetic Geometry

  • A bug in RichelotIsogenies over non-prime finite fields has been fixed. Reported, with provided fix, by Y. Bo Ti and N. Bruin.

Groebner Bases

  • A blowup in time/memory for Groebner basis computation in the case of sparse zero-dimensional ideals of high degree has been fixed. Reported by M. Zieve.

Groups

  • A crash in the StandardCopy intrinsic (group names 2A10 and 2A11) has been fixed. Bug reported by Stephen Humphries.

  • A bug where IrreducibleModules applied to a matrix group returned G-modules with G a permutation group has been fixed. Bug reported by Derek Holt.

Integer Ring

  • The universe of the sequence returned by Partitions has been changed to be consistent with other sequences of sequences. Reported by M. Zieve.

Lattices

  • A possible usage of uninitialized memory in BKZ was removed.

Linear Codes

  • A bug in the AutomorphismGroup and IsEquivalent functions for binary codes has been fixed. This bug may have caused equivalences and automorphisms to be not found.

Matrices

  • Multiplication for small matrices over the rational field has been sped up. Issue reported by S. Elsenhans.

  • The computation of CharacteristicPolynomial over reals/complexes now goes via NumericalEigenvalues.

  • A check has been added for TensorProduct when the result matrix would be too large.

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