X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=check%2Fexam_color.cpp;h=7f9e314eb162df29d8cd1d280806039d953d6904;hp=2190db8ed27e0a2920aa04424a0788b1ebd03a31;hb=0633ed8082961673eedc092689e06fa39d6bc322;hpb=4dc267ddbec7fcc1ba15bf0d60d72a346c9efb26

diff --git a/check/exam_color.cpp b/check/exam_color.cpp
index 2190db8e..7f9e314e 100644
--- a/check/exam_color.cpp
+++ b/check/exam_color.cpp
@@ -3,7 +3,7 @@
  *  Here we test GiNaC's color objects (su(3) Lie algebra). */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -17,7 +17,7 @@
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #include "exams.h"
@@ -44,7 +44,7 @@ static unsigned check_equal_simplify(const ex &e1, const ex &e2)
 	return 0;
 }
 
-static unsigned color_check1(void)
+static unsigned color_check1()
 {
 	// checks general identities and contractions of the structure constants
 
@@ -78,7 +78,7 @@ static unsigned color_check1(void)
 	return result;
 }
 
-static unsigned color_check2(void)
+static unsigned color_check2()
 {
 	// checks general identities and contractions of the generators
 
@@ -101,17 +101,19 @@ static unsigned color_check2(void)
 	result += check_equal_simplify(e, 16 * color_ONE() / 9);
 	e = color_T(a) * color_T(b) * color_T(c) * color_T(c) * color_T(b) *  color_T(a);
 	result += check_equal_simplify(e, 64 * color_ONE() / 27);
+	e = color_T(a) * color_T(b) * color_T(c) * color_T(k) * color_T(a) * color_T(k) *  color_T(c) * color_T(b);
+	result += check_equal_simplify(e, -color_ONE() / 162);
 
 	return result;
 }
 
-static unsigned color_check3(void)
+static unsigned color_check3()
 {
 	// checks traces
 
 	unsigned result = 0;
 
-	idx a(symbol("a"), 8), b(symbol("b"), 8), c(symbol("c"), 8), k(symbol("k"), 8);
+	idx a(symbol("a"), 8), b(symbol("b"), 8), c(symbol("c"), 8);
 	ex e;
 
 	e = color_ONE();
@@ -123,10 +125,22 @@ static unsigned color_check3(void)
 	e = color_T(a) * color_T(b) * color_T(c);
 	result += check_equal(color_trace(e), color_h(a, b, c) / 4);
 
+	e = color_ONE(0) * color_ONE(1) / 9;
+	result += check_equal(color_trace(e, 0), color_ONE(1) / 3);
+	result += check_equal(color_trace(e, 1), color_ONE(0) / 3);
+	result += check_equal(color_trace(e, 2), e);
+	result += check_equal(color_trace(e, lst(0, 1)), 1);
+
+	e = color_T(a, 0) * color_T(a, 1) * color_T(b, 0) * color_T(b, 1);
+	result += check_equal_simplify(color_trace(e, 0), 2 * color_ONE(1) / 3);
+	result += check_equal_simplify(color_trace(e, 1), 2 * color_ONE(0) / 3);
+	result += check_equal_simplify(color_trace(e, 2), e);
+	result += check_equal_simplify(color_trace(e, lst(0, 1)), 2);
+
 	return result;
 }
 
-unsigned exam_color(void)
+unsigned exam_color()
 {
 	unsigned result = 0;