Change log for Magma V2.23-11 (Released 29/6/2018)

$p$-adic Rings and their extensions

·Error checking of input to Exp has been improved. Reported by C. Fieker.

Algebraic Function Fields

·A fix has been made to ClassNumber of a function fields to avoid division by zero. Reported by A. Etropolski.

·The degree of the different divisor has been fixed for fields having more than 2 relative extensions in their representation. Reported by C. Quitte.

Cohomology

·A crash in CohomologyGroup over non-standard rings has been fixed. Reported by D. Gvirtz.

Groebner Bases

·A hang in the modular algorithm for certain GB computations over the rational field has been fixed. Reported by M. Stoll.

·An incorrect error message when computing GBs of ideals over GF(2) with field polynomials has been fixed. Reported by A. Sutherland.

Jacobi Motives

·Some discrepancies with ComplexEvaluation, and its underlying usage in Grossencharacter were fixed. Noted by J. Voight.

L-series

·The Coefficient intrinsic for the 1st coefficient always returned 1, even when given a list or coefficient function for which it was nonzero.

Matrix Algebras

·A crash in zero quotient algebras for matrices has been fixed.

Number Fields

·A crash involving the lack of a pre-computed basis for ideals when determining a generator with IsPrincipal has been fixed. Reported by M. Kida.

·A bug with computing PicardGroup of orders has been fixed. Reported by S. Marseglia and fixed by J. KlÃ¼ners.

Representation Theory

·Problems with accessing the database of characteristic zero irreducible modules have been fixed. Reported by G. Havas.

System

·The Sleep intrinsic no longer prints an empty sequence. Reported by N. Bruin.

·Listing a signature from the CompTree package no longer sets the "Lattice" verbose flag. Reported by N. Bruin.