Magma V2.11-7 Patch Notes

Patch release for Magma V2.11-7. Updated areas: Algebraic Geometry, Commutative Algebra, Groups, Rings and Fields, System.

28 August 2004 5 areas

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.

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.)

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

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.

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