Magma V2.27-8 Patch Notes

Algebraic Curves¶

• A bug in LPolynomial(C) applied to a certain class of curves has been fixed. Reported by A. Sutherland.

Algebraic Number Fields¶

• An oversight in which a computed maximal order was not stored on the field has been fixed, resulting in no recomputation of known orders. Reported by L. Combes.
• Testing some not yet known to be principal integral ideals of non maximal orders for principality has been fixed. Reported by M. Kirschmer.

Coding Theory¶

• A crash involving the deletion of codes after SymplecticDual had been called has been fixed. Reported by M. Grassl.

Elliptic Curves¶

• A crash in MordellWeilGroup for an elliptic curve defined over a number field has been fixed. Reported by S. Schiavone.

Finite Fields¶

• A slowdown arising from the creation of a very large number of finite fields with different characteristics has been fixed.

Groebner Bases¶

• A bug in Groebner basis computation with a large number of variables in the graded case has been fixed. Reported by W. Wemyss.
• A crash in the parallel F4 algorithm with the sparse monomial representation (selected when there is a large number of variables) has been fixed. Reported by M. Grassl.

Groups¶

• A new version of the matrix group CompositionTree code has been installed. Code supplied by E. O'Brien.
• A bug in MinimalDegreePermutationRepresentation has been fixed. Reported by E. O'Brien.

Hyperelliptic Curves¶

• A bug which caused ReducedModel to hang on some hyperelliptic curves has been fixed. Reported by E. Costa.

Rings¶

• &* when applied to polynomials over a non commutative ring has been fixed. Reported by P. Koprowski.