Change log for Magma V2.14-17 (Released 15/10/2008)

Diophantine Equations

·Fix an internal error in Solutions of a Thue-equation. Reported by M. Bennet.

·A wrong bound (too small in certain cases) was used in UnitEquation resulting in internal errors.

Elliptic Curves

·A crash in point multiplication has been fixed (and the computation sped up). Reported by D. Kern.

Galois Groups

·Add support for trivial extensions in GaloisSplittingField which would fail on linear polynomials. Reported by T. Dokchitser.

Matrix Groups

·A hang in matrix group order over fields of characteristic zero has been fixed. Reported by D. Yasaki.

Modules

·In RowSpace check for availability of echelon algorithm.

Number Field Sieve

·Add better input checking to the NFS function to avoid internal errors further down. Reported by M. Grassl.

Polynomial Rings

·ExactQuotient has been extended to handle more general rings in recursive definitions. Reported by M. Stoll.

·A crash in multiplication of very large polynomials has been fixed. Reported by D. Harvey.

System

·Some problems with lock files for packages have been fixed. Reported by M. Stoll.

p-adic Rings and Fields

·Use faster determinant algorithm.

·Improve precision estimates in SplittingField. Fixes a problem reported by T. Dokchitser.