Magma V2.11-7 Patch Notes

Algebraic Geometry¶

• Some bugs involving non-irreducible/reduced curves have been fixed, in particular in IsAbsolutelyIrreducible.
• Some bugs involving the empty scheme or empty sets in (Singular)PointsOverSplittingField have been fixed.

Commutative Algebra¶

• Some bugs involving multivariate resultants have been fixed.
• A bug normalizing multivariate polynomials over valuation rings has been fixed.
• A bug in MinimalBasis for inputs containing the zero polynomial has been fixed. (Bug reported by Tony Scholl.)

Groups¶

• A memory management problem that allowed the orders of ATLAS groups to be corrupted has been fixed. (Bug reported by Markus Grassl.)

Rings and Fields¶

• It is now possible to take Exp, Log and Sqrt of series over rings which contain the rationals. However, it is no longer possible to apply Exp to series over finite fields.
• A problem with class groups of imaginary quadratic fields that could result in a crash has been fixed.
• A problem with the computation of ReducedDiscriminant for certain types of number fields that could result in a crash has been fixed.
• RadicalExtension of a number field by some non-integral element changed the input.

System¶

• A bug causing crashes when a memory block greater than 4GB is allocated on 64-bit machines has been fixed. Reported by Bas Braams.