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Magma V2.29-4 Patch Notes

Patch release for Magma V2.29-4. Updated areas: Algebraic Number Fields, Commutative Algebra, Hyperelliptic Curves, Polynomial Rings, Quaternion Algebras and 2 more.

7 areas

Algebraic Number Fields

  • A crash when applying an isomorphism of number fields has been fixed. Reported by Sachi Hashimoto.

Commutative Algebra

  • An incorrect result in PrimaryDecomposition for multivariate ideals in very small characteristic has been fixed. Reported by Yongyuan Huang.

  • A hang in the La Scala free resolution algorithm applied to a certain large graded module has been fixed. Reported by George Kirkup.

Hyperelliptic Curves

  • The IsIsomorphic function has been fixed to correctly handle degenerate cases of hyperelliptic curves (genus 0 and genus 1). Reported by Sachi Hashimoto.

Polynomial Rings

  • An error has been fixed which would cause the incorrect decoding of the Magma-level printing for B.1 where B is a boolean polynomial ring with between 5 and 32 variables (inclusive).

Quaternion Algebras

Rational Curves and Conics

  • An IsIsomorphic function has been added to check whether two conic curves are isomorphic, and to return the corresponding isomorphism.

Strings

  • Grammar has been fixed for error messages when a string does not represent a number in a given base. Reported by David Roe.

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