X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fnormal.cpp;h=818aa808159a1789c7d577a3f3e7f6b4a6e0ea36;hp=ce606f0809411286cfef98e0f93df9b4ad5ac7ae;hb=3956eb4456d23f7ba937d9b2b726c1b6eac64530;hpb=3d7b9dad7f51c748b52e53ce2f759ae432531de1

diff --git a/ginac/normal.cpp b/ginac/normal.cpp
index ce606f08..818aa808 100644
--- a/ginac/normal.cpp
+++ b/ginac/normal.cpp
@@ -2196,14 +2196,18 @@ ex basic::normal(exmap & repl, exmap & rev_lookup, lst & modifier) const
 
 	normal_map_function map_normal;
 	int nmod = modifier.nops(); // To watch new modifiers to the replacement list
-	lst result = dynallocate<lst>({replace_with_symbol(map(map_normal), repl, rev_lookup, modifier), _ex1});
+	ex result = replace_with_symbol(map(map_normal), repl, rev_lookup, modifier);
 	for (int imod = nmod; imod < modifier.nops(); ++imod) {
 		exmap this_repl;
 		this_repl.insert(std::make_pair(modifier.op(imod).op(0), modifier.op(imod).op(1)));
-		result = ex_to<lst>(result.subs(this_repl, subs_options::no_pattern));
+		result = result.subs(this_repl, subs_options::no_pattern);
 	}
 
-	return result;
+	// Sometimes we may obtain negative powers, they need to be placed to denominator
+	if (is_a<power>(result) && result.op(1).info(info_flags::negative))
+		return dynallocate<lst>({_ex1, power(result.op(0), -result.op(1))});
+	else
+		return dynallocate<lst>({result, _ex1});
 }