Magma V2.28-13 Patch Notes

Algebraic Number Theory¶

• Some crashes in LMFDBLabel for ideals of orders of number fields have been fixed. Reported by D. Roe.
• Some crashes in OptimizedRepresentation involving the dynamic extension of precision for roots of the defining polynomial have been fixed. Reported by A. Brumer and A. Pacetti.

Commutative Algebra¶

• An obscure crash in radical decomposition of multivariate ideals over the rational field (coming from L2Quotients) has been fixed Reported by E. O'Brien.
• An incorrrect result in Groebner basis computation over the integer ring (coming from MinimalAssociatedPrimes) has been fixed. Reported by E. O'Brien.
• The computation of Groebner bases of integer rings or non-fields has been improved when there is a large redundancy in the input. Example input given by R. Bommel.

Curves¶

• A crash in ZetaFunction has been fixed. Reported by E. Costa.
• A crash in maps involving point sets of curves has been fixed. Reported by N. Swanson.

Groups¶

• A bug in testing an automorphism of a pc-group for being an inner automorphism IsInner has been fixed. Bug reported by D. Roe.
• A bug in GroupName (incorrectly naming a chief factor) has been fixed. Bug reported by D. Roe.
• A bug in the construction of automorphisms of a pc-group has been fixed. Bug reported by D. Roe as problems with Holomorph, OuterFpGroup, and the construction of invalid automorphisms.
• A crash when calling IsCharacter on a generalised character of norm 1 has been fixed. Reported by K. Andersen.
• A crash when using the !! operator with permutation groups defined on non-standard supports has been fixed. Reported by F. Manners.
• A problem when using IdentifyGroup has been fixed. Bug report by D. Roe.

Local Fields¶

• A bug in FrobeniusElement due to p-adic precision has been fixed. Reported by J. Jones.