Back to News
Patch Notes

Magma V2.26-12 Patch Notes

Patch release for Magma V2.26-12. Updated areas: Algebraic Number Fields, Algebraically Closed Fields, Elliptic Curves, Local Rings, Matrix Algebra and 4 more.

9 areas

Algebraic Number Fields

  • The algorithm used to compute IsSubfield for fields of degree more than 50 has been changed. Previously a root was computed by lifting but this showed to be unnecessarily expensive when for such degrees all roots can be computed in much less time. Reported by A. Pacetti.
  • A crash has been fixed in MaximalOrder when the Ramification parameter is specified and the number field is defined by a non-monic or non integral polynomial. Reported by J. Rouse.
  • ValuationRings and Localizations of number fields can now be constructed. Requested by A. Markowitz.

Algebraically Closed Fields

  • A crash involving algebraically closed fields defined over a small finite (arising from G-module computations) has been fixed. Reported by D. Benson.

Elliptic Curves

  • A crash in TatePairing(P, Q, m) where $P$ and $Q$ are equal has been fixed. Reported by M.R. Houben.

Local Rings

  • $p$-adic rings constructed as a completion of the integers or rationals will now have default precision given by the Precision parameter, consistent with completions of number fields. Reported by T. Keller.

Matrix Algebra

  • A crash in Centre for matrix algebras with large numbers of generators has been fixed. Reported by R. Zeier.

Representation Theory

Series Rings

  • Series rings constructed as a completion of a rational function field will now have default precision given by the Precision parameter, consistent with completions of function fields. Reported by T. Keller.

System

  • A crash has been fixed when printing multisets whose elements are multisets containing tuples of sets. Reported by R. van Bommel.

Valuation Rings

  • ValuationRings of algebraic number fields and function fields can now be constructed.
Back to News