From c8e2c9967b23aac88c91771dac5d1f5f04589f18 Mon Sep 17 00:00:00 2001 From: Christian Bauer Date: Fri, 1 Jun 2001 22:45:53 +0000 Subject: [PATCH 1/1] documentation update --- NEWS | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/NEWS b/NEWS index 962876ed..d5d29512 100644 --- a/NEWS +++ b/NEWS @@ -1,18 +1,26 @@ This file records noteworthy changes. 0.8.4 () +* 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". -* Added canonicalize_clifford() function that can be helpful when comparing - expressions containing Dirac matrices. +* New functions/methods: + - canonicalize_clifford() (helpful when comparing expressions containing + Dirac matrices) + - symmetrize() and antisymmetrize() + - numer_denom() (return numerator and denominator) + - map() (apply function to subexpressions) + - evalm() (evaluate sums and products 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()" and are denoted as "$0", "$1" etc. in the output and in ginsh. -* Added symmetrize(), antisymmetrize() and numer_denom() functions. * Fixed possible crash when calling subs() on expressions with non-commutative products. +* Positive integer powers of non-commutative expressions are automatically + expanded. 0.8.3 (11 May 2001) * color and clifford classes are functional and documented. -- 2.44.0