try to use rpow if the previous substitution fails

sagemath · Feb 17, 2016 · 265e9b4 · 265e9b4
1 parent 7acc487
commit 265e9b4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/sage/rings/asymptotic/growth_group.py b/src/sage/rings/asymptotic/growth_group.py
@@ -3667,6 +3667,10 @@ def _substitute_(self, rules):
         try:
             return self.base ** self.parent()._var_._substitute_(rules)
         except (ArithmeticError, TypeError, ValueError) as e:
+            try:
+                return self.parent()._var_._substitute_(rules).rpow(self.base)
+            except:
+                pass
             from misc import substitute_raise_exception
             substitute_raise_exception(self, e)