X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=ginac%2Frelational.cpp;h=86e2c2e8399bde1fbea5eb4db966e69aa2870f27;hb=73081e1cccfec32a9e9dab6a5e4b063b3fa0e7fb;hp=87acde42fe24b89e975167da4dd243716d411fe3;hpb=96af2609db413ddf70371e0423e6c07ecb5ee813;p=ginac.git

diff --git a/ginac/relational.cpp b/ginac/relational.cpp
index 87acde42..86e2c2e8 100644
--- a/ginac/relational.cpp
+++ b/ginac/relational.cpp
@@ -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