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Magma V2.13-10 Patch Notes

Patch release for Magma V2.13-10. Updated areas: Coding Theory, Groups, Interpreter, Local Rings, Matrices and 5 more.

10 areas

Coding Theory

  • Some bugs in the computation of the minimum Lee weight for codes over \(\mathbb{Z}_4\) have been fixed.

Groups

  • A bug in the reconstruction of p-group automorphisms on a second call to AutomorphismGroup has been fixed. Bug reported by Derek Holt.

  • Internal errors when the BlocksAction routine for permutation groups was given an incorrect block system have been trapped. Bug reported by Derek Holt.

  • A crash when IntegralGroup was given an infinite group argument has been fixed. This now gives a runtime error. Bug reported by Markus Grassl.

Interpreter

  • A bad leak in the eval operator has been fixed. Reported by D. Holt.

Local Rings

  • A bug that could cause some parentheses to be omitted when printing polynomials over some local rings has been fixed. Reported by J. Voight.

Matrices

  • A bug in KernelMatrix for matrices over multivariate polynomial rings over the integers and having zero rows has been fixed. Reported by Andreas-Stephan Elsenhans.

Modules

  • Missing checks for matrix spaces over rings with zero divisors have been inserted.

Monoids

  • A crash when using a monoid with generator names assigned has been fixed. Bug reported by Klaus Brockhaus.

Number Fields

  • Zeroes for orders and number fields returned the zeroes with not enough precision in the wrong ring (old reals).

  • The embedding from cyclotomic fields, number fields and quadratic fields into real and complex fields was ignoring the precision of the target ring, the internal number field precision was used.

  • An internal bug for user created prime ideals in relative extensions that could result in internal errors when the residue class fields of those ideals are used, has been fixed.

  • A bug in indexform equations in arbitrary orders of cubic fields that would, in some cases, trigger an internal error has been fixed.

Polynomial Rings

  • Localization for univariate polynomial rings over the rationals did not work when wrong arguments were being passed to it.

  • Localization(RngMPol, RngMPol) is now implemented.

  • Bugs in computing the squarefree factorization of polynomials over non-perfect fields have been fixed.

Residue Class Rings

  • Any rational may now be coerced into Integers(1).

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