Sage 9.5 Release Tour

current development cycle (2021)

Symbolics

• symbolic_expression is now able to create vectors and matrices of symbolic expressions for more general inputs. #16761

  • For example, if the input is a list or tuple of lists/tuples/vectors:

    • sage: M = symbolic_expression([[1, x, x^2], (x, x^2, x^3), vector([x^2, x^3, x^4])]); M
      [  1   x x^2]
      [  x x^2 x^3]
      [x^2 x^3 x^4]
      sage: M.parent()
      Full MatrixSpace of 3 by 3 dense matrices over Symbolic Ring

• Symbolic expressions can no longer be called with positional arguments. #14270

  • This was deprecated since Sage 4.0, although a bug prevented the deprecation warning from being issued in Sage versions 8.4 to 9.3. #32319

    Instead of (x+1)(2), write either (x+1)(x=2), or (x+1).subs(x=2), or ((x+1).function(x))(2).

Linear Algebra

Manifolds

Algebra

Deprecated and removed functionality

• The package sage.media is now deprecated. #12673

• The module sage.stats.basic_stats is now deprecated. #29662

  • In the deprecation messages, we point users to suitable numpy, and scipy.stats, and pandas functions. (Python 3 also comes with a basic ​built-in stats module, but much of its functionality is unfortunately incompatible with SageMath's number types, #28234.)

Package upgrades

• https://repology.org/projects/?inrepo=sagemath_develop

Availability of Sage 9.5 and installation help

The first beta release in the 9.5 development series was tagged on 2021-08-31.

• See sage-devel for development discussions and sage-release for announcements of beta versions and release candidates.

More details

• Open Meta-Tickets

• Trac tickets with milestone 9.5