--- title: "Magma V2.14-9 Patch Notes" canonical: "https://docs.magma-maths.org/patchnotes/2.14-9.html" source: "https://docs.magma-maths.org/patchnotes/2.14-9.md" --- # Magma V2.14-9 Patch Notes ## Aggregates - A crash in associative arrays (when keys are removed) has been fixed. Reported by B. Kerby. ## Elliptic Curves - A bug in `EllipticCurve` applied to genus 1 hyperelliptic curves has been fixed. Reported by Hendrik Hubrechts. ## Incidence Structures - Constructors for the various incidence structures have been extended to accept sets of vectors and sparse matrices to specify the blocks. In particular, the orbit of a vector under the action of a group may be used to specify the blocks. - A new intrinsic function `Design``(I, t, l)` has been added to convert incidence structure I to a t-(v,k,l) design. This is very quick as no checks are performed that I really is such a design. That responsibility lies with the user. The new function is intended for use when the call [`IsDesign`](../Combinatorics/Designs/boolean.md#function-isdesign-inc-rngintelt)`(I,t)` has returned true, l. ## Matrix Groups - A hang in proving a matrix group finite over a cyclotomic field has been fixed. Reported by M. Grassl. - The methods used to find the order of a matrix over a number field, rationals or integers, including determining whether they have finite or infinite order, have been improved. Follows query from H. Baarnhielm on time taken by the order algorithm. ## Modules - The functions `AHom` and [`GHom`](../RepresentationTheory/ModulesOverAnAlgebraAndGroupRepresentations/homomorphism.md#function-ghom-modgrp-modgrp) may now be applied to modules over the rational field. Restriction reported by P. Brooksbank. ## Polynomial Rings - A crash in polynomial arithmetic over residue class rings has been fixed. Reported by L. Finotti. ## Real Numbers - Fixed `RealToIntegerExponent` to return odd values only, as claimed. Reported by M. Grassl.