X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=ginac%2Ftensor.cpp;h=c215237d85f9d1225913b7fff4f87e59e0bc8134;hb=62a1dbf52d01b7f50cce2ed16219466ff7174c09;hp=7b1e32338c2b6ead77cb260f6a1e6d54d76c2628;hpb=3ac17e18ada69428fe170c10abcc5f33a30f0676;p=ginac.git

diff --git a/ginac/tensor.cpp b/ginac/tensor.cpp
index 7b1e3233..c215237d 100644
--- a/ginac/tensor.cpp
+++ b/ginac/tensor.cpp
@@ -141,6 +141,22 @@ DEFAULT_COMPARE(tensdelta)
 DEFAULT_COMPARE(tensmetric)
 DEFAULT_COMPARE(spinmetric)
 
+bool tensdelta::info(unsigned inf) const
+{
+	if(inf == info_flags::real)
+		return true;
+
+	return false;
+}
+
+bool tensmetric::info(unsigned inf) const
+{
+	if(inf == info_flags::real)
+		return true;
+
+	return false;
+}
+
 int minkmetric::compare_same_type(const basic & other) const
 {
 	GINAC_ASSERT(is_a<minkmetric>(other));
@@ -152,6 +168,14 @@ int minkmetric::compare_same_type(const basic & other) const
 		return inherited::compare_same_type(other);
 }
 
+bool minkmetric::info(unsigned inf) const
+{
+	if(inf == info_flags::real)
+		return true;
+
+	return false;
+}
+
 int tensepsilon::compare_same_type(const basic & other) const
 {
 	GINAC_ASSERT(is_a<tensepsilon>(other));
@@ -165,6 +189,22 @@ int tensepsilon::compare_same_type(const basic & other) const
 		return inherited::compare_same_type(other);
 }
 
+bool tensepsilon::info(unsigned inf) const
+{
+	if(inf == info_flags::real)
+		return true;
+
+	return false;
+}
+
+bool spinmetric::info(unsigned inf) const
+{
+	if(inf == info_flags::real)
+		return true;
+
+	return false;
+}
+
 DEFAULT_PRINT_LATEX(tensdelta, "delta", "\\delta")
 DEFAULT_PRINT(tensmetric, "g")
 DEFAULT_PRINT_LATEX(minkmetric, "eta", "\\eta")
@@ -588,6 +628,9 @@ ex epsilon_tensor(const ex & i1, const ex & i2)
 	if (!ex_to<idx>(i1).get_dim().is_equal(_ex2))
 		throw(std::runtime_error("index dimension of epsilon tensor must match number of indices"));
 
+	if(is_a<wildcard>(i1.op(0))||is_a<wildcard>(i2.op(0)))
+		return indexed(epsilon, antisymmetric2(), i1, i2).hold();
+
 	return indexed(epsilon, antisymmetric2(), i1, i2);
 }
 
@@ -604,6 +647,9 @@ ex epsilon_tensor(const ex & i1, const ex & i2, const ex & i3)
 	if (!ex_to<idx>(i1).get_dim().is_equal(_ex3))
 		throw(std::runtime_error("index dimension of epsilon tensor must match number of indices"));
 
+	if(is_a<wildcard>(i1.op(0))||is_a<wildcard>(i2.op(0))||is_a<wildcard>(i3.op(0)))
+		return indexed(epsilon, antisymmetric3(), i1, i2, i3).hold();
+
 	return indexed(epsilon, antisymmetric3(), i1, i2, i3);
 }
 
@@ -621,6 +667,9 @@ ex lorentz_eps(const ex & i1, const ex & i2, const ex & i3, const ex & i4, bool
 	if (!ex_to<idx>(i1).get_dim().is_equal(_ex4))
 		throw(std::runtime_error("index dimension of epsilon tensor must match number of indices"));
 
+	if(is_a<wildcard>(i1.op(0))||is_a<wildcard>(i2.op(0))||is_a<wildcard>(i3.op(0))||is_a<wildcard>(i4.op(0)))
+		return indexed(pos_sig ? epsilon_pos : epsilon_neg, antisymmetric4(), i1, i2, i3, i4).hold();
+
 	return indexed(pos_sig ? epsilon_pos : epsilon_neg, antisymmetric4(), i1, i2, i3, i4);
 }