@@ -132,7 +132,7 @@ lemma le_leftOrthogonal_rightOrthogonal (P : ObjectProperty C) :
132132
133133/-- If `P` is closed under quotients, extensions, and coproducts, then for any `X`,
134134the cokernel of the maximal `P`-subobject's arrow is `P.rightOrthogonal`. -/
135- lemma rightOrthogonal_cokernel_sSupOfP (P : ObjectProperty C)
135+ lemma rightOrthogonal_cokernel_sSup (P : ObjectProperty C)
136136 [P.IsClosedUnderQuotients] [P.IsClosedUnderExtensions]
137137 [∀ J : Type w, P.IsClosedUnderColimitsOfShape (Discrete J)]
138138 [LocallySmall.{w} C] [WellPowered.{w} C] [HasCoproducts.{w} C]
@@ -176,7 +176,7 @@ lemma rightOrthogonal_leftOrthogonal_le (P : ObjectProperty C)
176176 P.rightOrthogonal.leftOrthogonal ≤ P :=
177177 fun X hX ↦
178178 haveI : Epi (sSup P X).arrow :=
179- Preadditive.epi_of_cokernel_zero (hX (cokernel.π _) (rightOrthogonal_cokernel_sSupOfP P X))
179+ Preadditive.epi_of_cokernel_zero (hX (cokernel.π _) (rightOrthogonal_cokernel_sSup P X))
180180 P.prop_of_epi (sSup P X).arrow (sSup_prop P X)
181181
182182/-- If an object property `P` in an abelian category is closed under quotients, extensions,
@@ -283,6 +283,7 @@ theorem isTorsionClass_iff {P : ObjectProperty C} [LocallySmall.{w} C] [WellPowe
283283 exact ⟨P.rightOrthogonal,
284284 { torsion_eq_leftOrthogonal := eq_rightOrthogonal_leftOrthogonal P,
285285 free_eq_rightOrthogonal := rfl }⟩
286+
286287end TorsionTheory
287288
288289end CategoryTheory.Abelian
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