X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=check%2Fexam_clifford.cpp;h=68393673f78d4672432ee82d499e5cb6b05204ee;hb=a79a813e7249f793859d1d3b443d1931dbab94b6;hp=6262af8ae07fb63b8cfc873f3f3064f476c0c69f;hpb=83a7ee99a947cbbf331018b803ad6be43a9ccd45;p=ginac.git

diff --git a/check/exam_clifford.cpp b/check/exam_clifford.cpp
index 6262af8a..68393673 100644
--- a/check/exam_clifford.cpp
+++ b/check/exam_clifford.cpp
@@ -537,6 +537,19 @@ static unsigned clifford_check7(const ex & G, const symbol & dim)
 	return result;
 }
 
+static unsigned clifford_check8()
+{
+	unsigned result = 0;
+
+	realsymbol a("a");
+	varidx mu(symbol("mu", "\\mu"), 1);
+
+	ex e = clifford_unit(mu, diag_matrix(lst(-1))), e0 = e.subs(mu==0);
+	result += ( exp(a*e0)*e0*e0 == -exp(e0*a) ) ? 0 : 1;
+
+	return result;
+}
+
 unsigned exam_clifford()
 {
 	unsigned result = 0;
@@ -602,6 +615,8 @@ unsigned exam_clifford()
 	result += clifford_check7(indexed(-2*minkmetric(), sy_symm(), xi, chi), dim); cout << '.' << flush;
 	result += clifford_check7(-2*delta_tensor(xi, chi), dim); cout << '.' << flush;
 
+	result += clifford_check8(); cout << '.' << flush;
+
 	return result;
 }