feat: port Algebra.DirectSum.Ring (#1968)

Co-authored-by: int-y1 <jason_yuen2007@hotmail.com> Co-authored-by: Lukas Miaskiwskyi <lukas.mias@gmail.com> Co-authored-by: Oliver Nash <github@olivernash.org> Co-authored-by: Matthew Ballard <matt@mrb.email>
leanprover-community · May 17, 2023 · 4e3c151 · 4e3c151
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diff --git a/Mathlib.lean b/Mathlib.lean
@@ -68,6 +68,7 @@ import Mathlib.Algebra.CubicDiscriminant
 import Mathlib.Algebra.DirectSum.Basic
 import Mathlib.Algebra.DirectSum.Finsupp
 import Mathlib.Algebra.DirectSum.Module
+import Mathlib.Algebra.DirectSum.Ring
 import Mathlib.Algebra.Divisibility.Basic
 import Mathlib.Algebra.Divisibility.Units
 import Mathlib.Algebra.DualNumber