From 6818fc20b606266267ef5cf016d31599219151d9 Mon Sep 17 00:00:00 2001 From: Christian Bauer Date: Thu, 7 Jun 2001 20:07:32 +0000 Subject: [PATCH] documentation update --- NEWS | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/NEWS b/NEWS index 544721fc..af84e795 100644 --- a/NEWS +++ b/NEWS @@ -4,23 +4,21 @@ This file records noteworthy changes. * 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()" 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. -- 2.44.0