# Change log

The list below gives a human-readable overview of the changes from one version to the next. For details of precisely what is changed at the code level, consult the github repository. Odd patch levels correspond to versions in development, even numbered ones are released in packaged form.

### github master

- Introduced
`map_sympy`which can be used to apply Sympy functions to Cadabra expressions, acting in-place. - Fixed: expressions with powers often lack brackets.

### 2.1.4 (released 14-Apr-2017)

- Enable packages to be written using Cadabra notation, instead of only pure Python (still experimental).
- Young tableaux
properties
`Tableau`and`FilledTableau`the related algorithm`lr_tensor`are available again. - Sorting Majorana spinors possible again using
`sort_spinors`. - Extended
`rename_dummies`with capability to rename indices to different set. - Make
`vary`work on powers of expressions with dummy indices. - Substitution of sub-sums now available
(e.g. substitute of
`A+B=C`in`ex:=A+B+C+D`). - Improved LaTeX export to make printed notebooks look much better.
- Many improvements to the component engine, in particular for handling of derivatives and fractions involving tensors.
- Better line spacing for line-wrapped equations.
- Smarter scroll-to-cell behaviour of the notebook.
- Canonicalising expressions with component values for indices now works again.
- The
`unwrap`algorithm can now be guided about what to unwrap, and also knows about spinors and Dirac bars. - Experimental support to use Cadabra directly from C++ code, as a
library (see
the
`c++lib`directory). - Fixes for using a custom
`post_process`defined as a function nested inside another. - Rudimentary timing logic, try
`server.totals();` - Fixed: pasting text in the notebook sometimes double-pastes.
- Fixed:
`split_index`does not work properly on left- and right-hand side of equations. - Fixed:
`sort_product`does not always sort expressions. - Fixed:
`eliminate_metric`only acts at top level of an expression, should have`deep=True`by default. - Fixed: a bug which would lead to a segfault when using
`deep=True`.

### 2.1.2

- Bug fix: Crash on opening of a notebook on Ubuntu 16.04 and possibly others, related to minor differences in gtk versions.
- Bug fix: Installation paths of Debian/Ubuntu/Mint binary
packages changed from
`/usr/local`to`/usr`.

### 2.1.1

- Bug fix: Compilation error on gtk versions lower than 3.10.0.

### 2.1.0

- First properly versioned release after a series of 2.0.x releases which were meant for testing.