--- title: "Magma V2.28-22 Patch Notes" canonical: "https://docs.magma-maths.org/patchnotes/2.28-22.html" source: "https://docs.magma-maths.org/patchnotes/2.28-22.md" --- # Magma V2.28-22 Patch Notes ## Algebraic Function Fields - `Genus` of algebraic function fields using the Montes algorithm has been fixed. Reported by Anouk Eggink. ## Algebraic Number Fields - A crash in `ClassGroup` when linear extensions are involved has been fixed. Reported by Lewis Combes. - A signature `Evaluate(RngIntElt, PlcNumElt)` has been added back in. Reported by Shiva Chidambaram. - A bug where in `IsInvertible` for some non-unit elements of quotients of orders by primes has been been fixed. ## Associative Algebras - A bug in [`ElementsOfNorm`](../Algebras/AssociativeAlgebras/ideals.md#function-elementsofnorm-algassvordidl-rngelt) for an ideal in an associative algebra, failing when there are no elements of the given norm, has been fixed. Reported by Nuno Freitas. ## Commutative Algebra - A crash in `Hom` for modules defined over affine algebras and polynomial rings has been fixed. Reported by David Benson. - New procedure [`SetFaugereModular`](../CommutativeAlgebra/GrobnerBases/groebner.md#function-setfaugeremodular) (with corresponding function `GetFaugereModular`) to the allow modular Faugere F4 algorithm to be forced off (when set to [`false`](../MagmaLanguage/StatementsAndExpressions/boolean.md#literal-literal-false-false)). ## Matrix Groups - Finiteness testing for matrix groups defined over orders of number fields is now supported correctly. Reported by Ariel Pacetti. ## Modular Forms - A bug in printing [`Newforms`](../ModularArithmeticGeometry/ModularForms/newforms.md#function-newforms-modfrm) which was identifying conjugate forms, has been fixed. Reported by Sachi Hashimoto. ## Modular Symbols - A bug in `qExpansionBasis` for spaces of modular symbols created by Atkin-Lehner decomposition has been fixed. Reported by Maarten Derickx. ## Multivariate Polynomial Rings - A crash in very high degree polynomial multiplication over finite fields of characteristic 2 (coming out of bivariate polynomial factorization) has been fixed. - Magma-level printing for multivariate polynomial rings is now supported. ## Permutation Groups - A bug in `AutomorphismGroup` applied to matrices with constant entries has been fixed. Reported by Markus Grassl. ## Sequences - Magma-level printing of arithmetic progression sequences has been fixed. - Sequences in Pascal triangle form now have proper Magma-level printing. - The obsolete Curly print level has been removed.