X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Frelational.cpp;h=86e2c2e8399bde1fbea5eb4db966e69aa2870f27;hp=27f7b33b8372e178b3ee8144d5c348fdcf3d8305;hb=0e1c79a27b0567d8b9f5110b3a42647a71085aec;hpb=6d225ee55693c0617d254e6fa283c00c71bd2919

diff --git a/ginac/relational.cpp b/ginac/relational.cpp
index 27f7b33b..86e2c2e8 100644
--- a/ginac/relational.cpp
+++ b/ginac/relational.cpp
@@ -33,7 +33,7 @@ namespace GiNaC {
 
 GINAC_IMPLEMENT_REGISTERED_CLASS_OPT(relational, basic,
   print_func<print_context>(&relational::do_print).
-  print_func<print_tree>(&basic::do_print_tree).
+  print_func<print_tree>(&relational::do_print_tree).
   print_func<print_python_repr>(&relational::do_print_python_repr))
 
 //////////
@@ -164,7 +164,14 @@ ex relational::op(size_t i) const
 
 ex relational::map(map_function & f) const
 {
-	return (new relational(f(lh), f(rh), o))->setflag(status_flags::dynallocated);
+	const ex &mapped_lh = f(lh);
+	const ex &mapped_rh = f(rh);
+
+	if (!are_ex_trivially_equal(lh, mapped_lh)
+	 || !are_ex_trivially_equal(rh, mapped_rh))
+		return (new relational(mapped_lh, mapped_rh, o))->setflag(status_flags::dynallocated);
+	else
+		return *this;
 }
 
 ex relational::eval(int level) const