# AbstractAlgebra 0.13.0 and Nemo 0.20.0 released

We are pleased to announce the release of new versions of AbstractAlgebra (0.13.0) and Nemo (0.20.0).

Here is an overview of the changes in this release:

### AbstractAlgebra

• Plenty of small bugfixes.
• Retiring the legacy printer, including the functions show_minus_one, needs_parentheses and displayd_with_minus_in_fron used by the old printing routines.
• Matrices now implement the iterator interface of julia.
• Matrix spaces now implement the iterator interface (if the base ring is iterable).
• Use of one(G) instead of G() to create the identity element of permutation groups.
• Renaming rref to rref_rational for rings.

For more details, please consult the AbstractAlgebra.jl 0.13.0 release page which lists all changes that went into this release.

### Nemo

• Various small bugfixes.
• Retiring the legacy printer and use the expressify mechanism for all types.
• Iteration for finite fields.

For more details, please consult the Nemo.jl 0.20.0 release page which lists all changes that went into this release.

The main contributors to these releases were: @albinahlback, @fieker, @fingolfin, @kalmarek, @rfourquet, @thofma, @tthsqe12, @wbhart

On behalf of the developers,

Tommy