leanprover-community · kim-em · May 20, 2024
diff --git a/Mathlib/AlgebraicGeometry/Morphisms/Basic.lean b/Mathlib/AlgebraicGeometry/Morphisms/Basic.lean
@@ -526,7 +526,7 @@ theorem diagonalTargetAffineLocallyOfOpenCover (P : AffineTargetMorphismProperty
   let 𝒱 := (Scheme.Pullback.openCoverOfBase 𝒰 f f).bind fun i =>
     Scheme.Pullback.openCoverOfLeftRight.{u} (𝒰' i) (𝒰' i) pullback.snd pullback.snd
   have i1 : ∀ i, IsAffine (𝒱.obj i) := fun i => by dsimp [𝒱]; infer_instance
-  refine' (hP.affine_openCover_iff _ _).mpr _
+  refine' (hP.affine_openCover_iff _ 𝒱).mpr _
   rintro ⟨i, j, k⟩
   dsimp [𝒱]
   convert (affine_cancel_left_isIso hP.1

diff --git a/Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean b/Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean
@@ -136,8 +136,8 @@ theorem isCompact_basicOpen (X : Scheme) {U : Opens X.carrier} (hU : IsCompact (
     use V.1 ⊓ X.basicOpen f
     have : V.1.1 ⟶ U := by
       apply homOfLE; change _ ⊆ (U : Set X.carrier); rw [e]
-      convert @Set.subset_iUnion₂ _ _ _
-        (fun (U : X.affineOpens) (_ : U ∈ s) => ↑U) V V.prop using 1
+      convert Set.subset_iUnion₂ (s := fun (U : X.affineOpens) (_ : U ∈ s) => (U : Set X.carrier))
+        V V.prop using 1
     erw [← X.toLocallyRingedSpace.toRingedSpace.basicOpen_res this.op]
     exact IsAffineOpen.basicOpenIsAffine V.1.prop _
   haveI : Finite s := hs.to_subtype

diff --git a/Mathlib/AlgebraicGeometry/StructureSheaf.lean b/Mathlib/AlgebraicGeometry/StructureSheaf.lean
@@ -980,10 +980,7 @@ instance IsLocalization.to_basicOpen (r : R) :
 #align algebraic_geometry.structure_sheaf.is_localization.to_basic_open AlgebraicGeometry.StructureSheaf.IsLocalization.to_basicOpen
 
 instance to_basicOpen_epi (r : R) : Epi (toOpen R (PrimeSpectrum.basicOpen r)) :=
-  ⟨fun {S} f g h => by
-    refine' IsLocalization.ringHom_ext (R := R)
-      (S := (structureSheaf R).val.obj (op <| PrimeSpectrum.basicOpen r)) _ _
-    exact h⟩
+  ⟨fun _ _ h => IsLocalization.ringHom_ext (Submonoid.powers r) h⟩
 #align algebraic_geometry.structure_sheaf.to_basic_open_epi AlgebraicGeometry.StructureSheaf.to_basicOpen_epi
 
 @[elementwise]

diff --git a/Mathlib/Analysis/BoxIntegral/Partition/Basic.lean b/Mathlib/Analysis/BoxIntegral/Partition/Basic.lean
@@ -625,7 +625,7 @@ theorem filter_true : (π.filter fun _ => True) = π :=
 theorem iUnion_filter_not (π : Prepartition I) (p : Box ι → Prop) :
     (π.filter fun J => ¬p J).iUnion = π.iUnion \ (π.filter p).iUnion := by
   simp only [Prepartition.iUnion]
-  convert (@Set.biUnion_diff_biUnion_eq _ (Box ι) π.boxes (π.filter p).boxes (↑) _).symm
+  convert (@Set.biUnion_diff_biUnion_eq (ι → ℝ) (Box ι) π.boxes (π.filter p).boxes (↑) _).symm
   · simp (config := { contextual := true })
   · rw [Set.PairwiseDisjoint]
     convert π.pairwiseDisjoint

diff --git a/Mathlib/Analysis/Convex/Segment.lean b/Mathlib/Analysis/Convex/Segment.lean
@@ -337,12 +337,12 @@ theorem midpoint_mem_segment [Invertible (2 : 𝕜)] (x y : E) : midpoint 𝕜 x
 #align midpoint_mem_segment midpoint_mem_segment
 
 theorem mem_segment_sub_add [Invertible (2 : 𝕜)] (x y : E) : x ∈ [x - y -[𝕜] x + y] := by
-  convert @midpoint_mem_segment 𝕜 _ _ _ _ _ _ _
+  convert @midpoint_mem_segment 𝕜 _ _ _ _ _ (x - y) (x + y)
   rw [midpoint_sub_add]
 #align mem_segment_sub_add mem_segment_sub_add
 
 theorem mem_segment_add_sub [Invertible (2 : 𝕜)] (x y : E) : x ∈ [x + y -[𝕜] x - y] := by
-  convert @midpoint_mem_segment 𝕜 _ _ _ _ _ _ _
+  convert @midpoint_mem_segment 𝕜 _ _ _ _ _ (x + y) (x - y)
   rw [midpoint_add_sub]
 #align mem_segment_add_sub mem_segment_add_sub
 

diff --git a/Mathlib/Analysis/InnerProductSpace/l2Space.lean b/Mathlib/Analysis/InnerProductSpace/l2Space.lean
@@ -475,7 +475,7 @@ protected theorem dense_span (b : HilbertBasis ι 𝕜 E) :
 
 protected theorem hasSum_inner_mul_inner (b : HilbertBasis ι 𝕜 E) (x y : E) :
     HasSum (fun i => ⟪x, b i⟫ * ⟪b i, y⟫) ⟪x, y⟫ := by
-  convert (b.hasSum_repr y).mapL (innerSL _ x) using 1
+  convert (b.hasSum_repr y).mapL (innerSL 𝕜 x) using 1
   ext i
   rw [innerSL_apply, b.repr_apply_apply, inner_smul_right, mul_comm]
 #align hilbert_basis.has_sum_inner_mul_inner HilbertBasis.hasSum_inner_mul_inner

diff --git a/Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean b/Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean
@@ -351,7 +351,7 @@ instance finiteDimensional_vectorSpan_insert (s : AffineSubspace k P)
   rcases (s : Set P).eq_empty_or_nonempty with (hs | ⟨p₀, hp₀⟩)
   · rw [coe_eq_bot_iff] at hs
     rw [hs, bot_coe, span_empty, bot_coe, direction_affineSpan]
-    convert finiteDimensional_bot _ _ <;> simp
+    convert finiteDimensional_bot k V <;> simp
   · rw [affineSpan_coe, direction_affineSpan_insert hp₀]
     infer_instance
 #align finite_dimensional_vector_span_insert finiteDimensional_vectorSpan_insert

diff --git a/Mathlib/LinearAlgebra/TensorProduct/Vanishing.lean b/Mathlib/LinearAlgebra/TensorProduct/Vanishing.lean
@@ -120,7 +120,7 @@ theorem vanishesTrivially_of_sum_tmul_eq_zero (hm : Submodule.span R (Set.range
   have exact_ker_subtype : Exact (ker G).subtype G := G.exact_subtype_ker_map
   -- Tensor the exact sequence with $N$.
   have exact_rTensor_ker_subtype : Exact (rTensor N (ker G).subtype) (rTensor N G) :=
-    rTensor_exact N exact_ker_subtype G_surjective
+    rTensor_exact (M := ↥(ker G)) N exact_ker_subtype G_surjective
   /- We conclude that $\sum_i e_i \otimes n_i$ is in the range of
     $\ker G \otimes N \to R^\iota \otimes N$. -/
   have en_mem_range : en ∈ range (rTensor N (ker G).subtype) :=

diff --git a/Mathlib/NumberTheory/Padics/PadicVal.lean b/Mathlib/NumberTheory/Padics/PadicVal.lean
@@ -768,8 +768,8 @@ digits of `k` plus the sum of the digits of `n - k` minus the sum of digits of `
 theorem sub_one_mul_padicValNat_choose_eq_sub_sum_digits {k n : ℕ} [hp : Fact p.Prime]
     (h : k ≤ n) : (p - 1) * padicValNat p (choose n k) =
     (p.digits k).sum + (p.digits (n - k)).sum - (p.digits n).sum := by
-  convert @sub_one_mul_padicValNat_choose_eq_sub_sum_digits' _ _ _ _
-  all_goals exact Nat.eq_add_of_sub_eq h rfl
+  convert @sub_one_mul_padicValNat_choose_eq_sub_sum_digits' _ _ _ ‹_›
+  all_goals omega
 
 end padicValNat
 

diff --git a/Mathlib/RingTheory/Jacobson.lean b/Mathlib/RingTheory/Jacobson.lean
@@ -491,7 +491,7 @@ theorem isMaximal_comap_C_of_isMaximal [Nontrivial R] (hP' : ∀ x : R, C x ∈
   suffices (⊥ : Ideal (Localization M)).IsMaximal by
     rw [← IsLocalization.comap_map_of_isPrime_disjoint M (Localization M) ⊥ bot_prime
       (disjoint_iff_inf_le.mpr fun x hx => hM (hx.2 ▸ hx.1))]
-    refine' ((isMaximal_iff_isMaximal_disjoint (Localization M) _ _).mp (by rwa [map_bot])).1
+    refine' ((isMaximal_iff_isMaximal_disjoint (Localization M) a _).mp (by rwa [map_bot])).1
   let M' : Submonoid (R[X] ⧸ P) := M.map φ
   have hM' : (0 : R[X] ⧸ P) ∉ M' := fun ⟨z, hz⟩ =>
     hM (quotientMap_injective (_root_.trans hz.2 φ.map_zero.symm) ▸ hz.1)