Fixed change ring to ensure that the original implementation remains.

sagemath · Jun 13, 2021 · 974b361 · 974b361
1 parent 7b231ec
commit 974b361
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/sage/rings/lazy_laurent_series.py b/src/sage/rings/lazy_laurent_series.py
@@ -893,7 +893,7 @@ def change_ring(self, ring):
             c = None
 
         from .lazy_laurent_series_ring import LazyLaurentSeriesRing
-        Q = LazyLaurentSeriesRing(ring, names=R.variable_name())
+        Q = LazyLaurentSeriesRing(ring, names=R.variable_name(), implementation=R._implementation)
         return Q.element_class(Q, coefficient=op, valuation=a, constant=c)
 
     def truncate(self, d):