X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=check%2Fexam_clifford.cpp;h=fc97ac02447fb81a89d6c71e500f4720d04a5ff9;hp=bea0a219f1d0cb045adf9737950bed8fa1a3905f;hb=3ab7092e925aba28498d7508f50da9f913dcffd2;hpb=c029603c04ff63a6b171ff1f949d43c50413f49d

diff --git a/check/exam_clifford.cpp b/check/exam_clifford.cpp
index bea0a219..fc97ac02 100644
--- a/check/exam_clifford.cpp
+++ b/check/exam_clifford.cpp
@@ -107,7 +107,7 @@ static unsigned clifford_check3(void)
 
 	symbol dim("D"), m("m"), q("q"), l("l"), ldotq("ldotq");
 	varidx mu(symbol("mu"), dim), nu(symbol("nu"), dim), rho(symbol("rho"), dim),
-	       sig(symbol("sig"), dim), kap(symbol("kap"), dim), lam(symbol("lam"), 4);
+	       sig(symbol("sig"), dim), kap(symbol("kap"), dim), lam(symbol("lam"), dim);
 	ex e;
 
 	e = dirac_gamma(mu);
@@ -173,6 +173,17 @@ static unsigned clifford_check3(void)
 	e = dirac_trace(e).simplify_indexed(sp);
 	result += check_equal(e, 4*(2*ldotq*ldotq + q*q*ldotq - q*q*l*l + q*q*m*m).expand());
 
+	// stuff that had problems in the past
+	ex prop = dirac_slash(q, dim) - m * dirac_ONE();
+	e = dirac_slash(l, dim) * dirac_gamma5() * dirac_slash(l, dim) * prop;
+	e = dirac_trace(dirac_slash(q, dim) * e) - dirac_trace(m * e)
+	  - dirac_trace(prop * e);
+	result += check_equal(e, 0);
+
+	e = (dirac_gamma5() + dirac_ONE()) * dirac_gamma5();
+	e = dirac_trace(e);
+	result += check_equal(e, 4);
+
 	return result;
 }
 
@@ -250,7 +261,7 @@ unsigned exam_clifford(void)
 	result += clifford_check3();  cout << '.' << flush;
 	result += clifford_check4();  cout << '.' << flush;
 	result += clifford_check5();  cout << '.' << flush;
-	
+
 	if (!result) {
 		cout << " passed " << endl;
 		clog << "(no output)" << endl;