* In the output and in ginsh, lists are now delimited by { } braces, and
matrices are delimited by single [ ] brackets.
* simplify_indexed() renames dummy indices so, e.g., "a.i*a.i+a.j*a.j" gets
- simplified to "2*a.i*a.i".
+ simplified to "2*a.i*a.i" (or "2*a.j*a.j").
* New functions/methods:
- canonicalize_clifford() (helpful when comparing expressions containing
Dirac matrices)
- symmetrize() and antisymmetrize()
- - numer_denom() (return numerator and denominator)
+ - numer_denom() (return numerator and denominator in one call)
- map() (apply function to subexpressions)
- - evalm() (evaluate sums and products of matrices)
+ - evalm() (evaluate sums, products and integer powers of matrices)
* Added a new function match() for performing pattern matching. subs() and
has() also accept patterns as arguments. A pattern can be any expression,
optionally containing wildcard objects. These are constructed with the
call "wild(<unsigned>)" and are denoted as "$0", "$1" etc. in the output
and in ginsh.
-* Fixed possible crash when calling subs() on expressions with non-commutative
- products.
-* Positive integer powers of non-commutative expressions are automatically
- expanded.
+* Positive integer powers of non-commutative expressions (except matrices)
+ are automatically expanded.
* Removed cint subdirectory, ginaccint is a separate package now due to
packaging considerations.
* Several little bugfixes.