mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
W : Type u_3
P : Type u_4
Q : Type u_5
inst✝⁶ : Ring k
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module k V
inst✝³ : AffineSpace V P
inst✝² : AddCommGroup W
inst✝¹ : Module k W
inst✝ : AffineSpace W Q
t : AffineSubspace k P
⊢ ⊥.prod t = ⊥

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Convex.Function

Goal state before:
pp: 𝕜 : Type u_1
E : Type u_2
β : Type u_5
inst✝⁹ : Field 𝕜
inst✝⁸ : LinearOrder 𝕜
inst✝⁷ : IsStrictOrderedRing 𝕜
inst✝⁶ : AddCommMonoid β
inst✝⁵ : PartialOrder β
inst✝⁴ : IsOrderedAddMonoid β
inst✝³ : AddCommMonoid E
inst✝² : SMul 𝕜 E
inst✝¹ : Module 𝕜 β
inst✝ : PosSMulMono 𝕜 β
f : E → β
s : Set E
x y : E
hf : StrictConvexOn 𝕜 s f
hfx : IsMinOn f s x
hfy : IsMinOn f s y
hx : x ∈ s
hy : y ∈ s
hxy : ¬x = y
z : E := 2⁻¹ • x + 2⁻¹ • y
hz : z ∈ s
⊢ 2⁻¹ + 2⁻¹ = 1

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : NormedField 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
s : Set (Seminorm 𝕜 E)
hp : BddAbove s
x : E
⊢ (sSup s) x = ⨆ p, ↑p x

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
W : Type u_3
P : Type u_4
Q : Type u_5
inst✝⁶ : Ring k
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module k V
inst✝³ : AffineSpace V P
inst✝² : AddCommGroup W
inst✝¹ : Module k W
inst✝ : AffineSpace W Q
s : Set P
t : Set Q
⊢ vectorSpan k (s ×ˢ t) ≤ (vectorSpan k s).prod (vectorSpan k t)

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : NormedField 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
ι : Sort u_12
p : ι → Seminorm 𝕜 E
hp : BddAbove (range p)
x : E
⊢ (⨆ i, p i) x = ⨆ i, (p i) x

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
S : AffineSpace V P
ι : Type u_4
s : Finset ι
inst✝ : DecidableEq ι
p : ι → P
i j : ι
hi : i ∈ s
hj : j ∈ s
c : k
⊢ (affineCombination k s p) (affineCombinationLineMapWeights i j c) = (AffineMap.lineMap (p i) (p j)) c

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
W : Type u_3
P : Type u_4
Q : Type u_5
inst✝⁶ : Ring k
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module k V
inst✝³ : AffineSpace V P
inst✝² : AddCommGroup W
inst✝¹ : Module k W
inst✝ : AffineSpace W Q
s : AffineSubspace k P
t : AffineSubspace k Q
⊢ (s.prod t).direction ≤ s.direction.prod t.direction

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : NormedField 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
⊢ sSup ∅ = ⊥

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Convex.Function

Goal state before:
pp: 𝕜 : Type u_1
E : Type u_2
β : Type u_5
inst✝⁹ : Field 𝕜
inst✝⁸ : LinearOrder 𝕜
inst✝⁷ : IsStrictOrderedRing 𝕜
inst✝⁶ : AddCommMonoid β
inst✝⁵ : PartialOrder β
inst✝⁴ : IsOrderedAddMonoid β
inst✝³ : AddCommMonoid E
inst✝² : SMul 𝕜 E
inst✝¹ : Module 𝕜 β
inst✝ : PosSMulMono 𝕜 β
f : E → β
s : Set E
x y : E
hf : StrictConvexOn 𝕜 s f
hfx : IsMinOn f s x
hfy : IsMinOn f s y
hx : x ∈ s
hy : y ∈ s
hxy : ¬x = y
z : E := 2⁻¹ • x + 2⁻¹ • y
hz : z ∈ s
⊢ 2⁻¹ • f x + 2⁻¹ • f y ≤ 2⁻¹ • f z + 2⁻¹ • f z

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: k : Type u_6
V : Type u_7
P : Type u_8
inst✝⁴ : CommRing k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
ι : Type u_9
inst✝ : DecidableEq ι
s : Finset ι
p : ι → P
w : ι → k
i : ι
hi : i ∈ s
r : k
⊢ (AffineMap.homothety (p i) r) ((affineCombination k s p) w) =
    (affineCombination k s p) ((AffineMap.lineMap (Pi.single i 1) w) r)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
W : Type u_3
P : Type u_4
Q : Type u_5
inst✝⁶ : Ring k
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module k V
inst✝³ : AffineSpace V P
inst✝² : AddCommGroup W
inst✝¹ : Module k W
inst✝ : AffineSpace W Q
s : Set P
t : Set Q
hs : s.Nonempty
ht : t.Nonempty
⊢ vectorSpan k (s ×ˢ t) = (vectorSpan k s).prod (vectorSpan k t)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
W : Type u_3
P : Type u_4
Q : Type u_5
inst✝⁶ : Ring k
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module k V
inst✝³ : AffineSpace V P
inst✝² : AddCommGroup W
inst✝¹ : Module k W
inst✝ : AffineSpace W Q
s : AffineSubspace k P
t : AffineSubspace k Q
hs : s ≠ ⊥
ht : t ≠ ⊥
⊢ (s.prod t).direction = s.direction.prod t.direction

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Convex.Function

Goal state before:
pp: 𝕜 : Type u_1
E : Type u_2
β : Type u_5
inst✝⁹ : Field 𝕜
inst✝⁸ : LinearOrder 𝕜
inst✝⁷ : IsStrictOrderedRing 𝕜
inst✝⁶ : AddCommMonoid β
inst✝⁵ : PartialOrder β
inst✝⁴ : IsOrderedAddMonoid β
inst✝³ : AddCommMonoid E
inst✝² : SMul 𝕜 E
inst✝¹ : Module 𝕜 β
inst✝ : PosSMulMono 𝕜 β
f : E → β
s : Set E
x y : E
hf : StrictConvexOn 𝕜 s f
hfx : IsMinOn f s x
hfy : IsMinOn f s y
hx : x ∈ s
hy : y ∈ s
hxy : ¬x = y
z : E := 2⁻¹ • x + 2⁻¹ • y
hz : z ∈ s
⊢ 2⁻¹ • f z + 2⁻¹ • f z = f z

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Convex.Function

Goal state before:
pp: 𝕜 : Type u_1
E : Type u_2
β : Type u_5
inst✝⁹ : Field 𝕜
inst✝⁸ : LinearOrder 𝕜
inst✝⁷ : IsStrictOrderedRing 𝕜
inst✝⁶ : AddCommMonoid β
inst✝⁵ : PartialOrder β
inst✝⁴ : IsOrderedAddMonoid β
inst✝³ : AddCommMonoid E
inst✝² : SMul 𝕜 E
inst✝¹ : Module 𝕜 β
inst✝ : PosSMulMono 𝕜 β
f : E → β
s : Set E
x y : E
hf : StrictConvexOn 𝕜 s f
hfx : IsMinOn f s x
hfy : IsMinOn f s y
hx : x ∈ s
hy : y ∈ s
⊢ x = y

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
inst✝ : DivisionRing k
ι : Type u_4
s : Finset ι
h : ↑(#s) ≠ 0
⊢ ∑ i ∈ s, centroidWeights k s i = 1

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
inst✝¹ : DivisionRing k
ι : Type u_4
s : Finset ι
inst✝ : CharZero k
h : #s ≠ 0
⊢ ∑ i ∈ s, centroidWeights k s i = 1

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝³ : DivisionRing k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s : Finset P
⊢ centroid k univ Subtype.val = centroid k s id

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝³ : DivisionRing k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
ι : Type u_4
p : ι → P
i : ι
⊢ centroid k {i} p = p i

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : NormedField 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
s : Set (Seminorm 𝕜 E)
hs₁ : BddAbove s
hs₂ : s.Nonempty
⊢ IsLUB s (sSup s)

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
x : E
r : ℝ
hr : 0 < r
⊢ x ∈ p.ball x r

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
x : E
r : ℝ
hr : 0 ≤ r
⊢ x ∈ p.closedBall x r

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
W : Type u_3
P : Type u_4
Q : Type u_5
inst✝⁶ : Ring k
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module k V
inst✝³ : AffineSpace V P
inst✝² : AddCommGroup W
inst✝¹ : Module k W
inst✝ : AffineSpace W Q
s : Set P
t : Set Q
⊢ affineSpan k (s ×ˢ t) = (affineSpan k s).prod (affineSpan k t)

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
y : E
r : ℝ
⊢ y ∈ p.ball 0 r ↔ p y < r

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝⁵ : DivisionRing k
inst✝⁴ : AddCommGroup V
inst✝³ : Module k V
inst✝² : AffineSpace V P
ι : Type u_4
inst✝¹ : DecidableEq ι
inst✝ : Invertible 2
p : ι → P
i₁ i₂ : ι
h : ¬i₁ = i₂
⊢ ↑(#{i₁, i₂}) ≠ 0

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
y : E
r : ℝ
⊢ y ∈ p.closedBall 0 r ↔ p y ≤ r

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: ι : Type u_1
k : Type u_2
V : Type u_3
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s : Finset ι
w : ι → k
h : ∑ i ∈ s, w i = 0
p : ι → P
⊢ (s.weightedVSub p) w ∈ vectorSpan k (Set.range p)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s₁ s₂ : AffineSubspace k P
h : s₁ ∥ s₂
⊢ s₂ ∥ s₁

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s : AffineSubspace k P
⊢ s = map (↑(constVAdd k P 0)) s

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: ι : Type u_1
k : Type u_2
V : Type u_3
P : Type u_4
inst✝⁴ : Ring k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
inst✝ : Nontrivial k
s : Finset ι
w : ι → k
h : ∑ i ∈ s, w i = 1
p : ι → P
hnz : ∑ i ∈ s, w i ≠ 0
i1 : ι
hi1 : i1 ∈ s
w1 : ι → k := Function.update (Function.const ι 0) i1 1
⊢ ∑ i ∈ s, w1 i = 1

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝⁵ : DivisionRing k
inst✝⁴ : AddCommGroup V
inst✝³ : Module k V
inst✝² : AffineSpace V P
ι : Type u_4
inst✝¹ : DecidableEq ι
inst✝ : Invertible 2
p : ι → P
i₁ i₂ : ι
⊢ centroid k {i₁, i₂} p = 2⁻¹ • (p i₂ -ᵥ p i₁) +ᵥ p i₁

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝⁴ : DivisionRing k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
inst✝ : Invertible 2
p : Fin 2 → P
⊢ centroid k univ p = 2⁻¹ • (p 1 -ᵥ p 0) +ᵥ p 0

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s₁ s₂ s₃ : AffineSubspace k P
h₁₂ : s₁ ∥ s₂
h₂₃ : s₂ ∥ s₃
⊢ s₁ ∥ s₃

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝³ : DivisionRing k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
ι : Type u_4
ι₂ : Type u_5
s₂ : Finset ι₂
e : ι₂ ↪ ι
p : ι → P
⊢ centroid k (map e s₂) p = centroid k s₂ (p ∘ ⇑e)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s₁ s₂ : AffineSubspace k P
h : s₁ ∥ s₂
⊢ s₁.direction = s₂.direction

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
x : E
r : ℝ
⊢ p.closedBall x r = ⋂ ρ, ⋂ (_ : ρ > r), p.ball x ρ

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
inst✝² : DivisionRing k
ι : Type u_4
s : Finset ι
inst✝¹ : CharZero k
inst✝ : Fintype ι
h : #s ≠ 0
⊢ ∑ i, centroidWeightsIndicator k s i = 1

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
inst✝² : DivisionRing k
ι : Type u_4
s : Finset ι
inst✝¹ : CharZero k
inst✝ : Fintype ι
h : s.Nonempty
⊢ ∑ i, centroidWeightsIndicator k s i = 1

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s : AffineSubspace k P
⊢ s ∥ ⊥ ↔ s = ⊥

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
inst✝² : DivisionRing k
ι : Type u_4
s : Finset ι
inst✝¹ : CharZero k
inst✝ : Fintype ι
n : ℕ
h : #s = n + 1
⊢ ∑ i, centroidWeightsIndicator k s i = 1

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: ι : Type u_1
k : Type u_2
V : Type u_3
P : Type u_4
inst✝⁴ : Ring k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
inst✝ : Nontrivial k
s : Finset ι
w : ι → k
h : ∑ i ∈ s, w i = 1
p : ι → P
hnz : ∑ i ∈ s, w i ≠ 0
i1 : ι
hi1 : i1 ∈ s
w1 : ι → k := Function.update (Function.const ι 0) i1 1
hw1 : ∑ i ∈ s, w1 i = 1
hw1s : (Finset.affineCombination k s p) w1 = p i1
⊢ (Finset.affineCombination k s p) w -ᵥ p i1 ∈ (affineSpan k (Set.range p)).direction

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s : AffineSubspace k P
⊢ ⊥ ∥ s ↔ s = ⊥

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
r : ℝ
x : E
hr : 0 < r
⊢ ball 0 x r = univ

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: ι : Type u_1
k : Type u_2
V : Type u_3
P : Type u_4
inst✝⁴ : Ring k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
inst✝ : Nontrivial k
s : Finset ι
w : ι → k
h : ∑ i ∈ s, w i = 1
p : ι → P
⊢ (Finset.affineCombination k s p) w ∈ affineSpan k (Set.range p)

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
c : ℝ≥0
hc : 0 < c
r : ℝ
x : E
⊢ (c • p).ball x r = p.ball x (r / ↑c)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝⁴ : DivisionRing k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
ι : Type u_4
s : Finset ι
p : ι → P
hi : ∀ i ∈ s, ∀ j ∈ s, p i = p j → i = j
ps : Set P
inst✝ : Fintype ↑ps
hps : ps = p '' ↑s
f : ↑(p '' ↑s) → ι := fun x ↦ Exists.choose ⋯
hf : ∀ (x : ↑(p '' ↑s)), f x ∈ s ∧ p (f x) = ↑x
f' : ↑ps → ι := fun x ↦ f ⟨↑x, ⋯⟩
hf' : ∀ (x : ↑ps), f' x ∈ s ∧ p (f' x) = ↑x
⊢ Function.Injective f'

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: ι : Type u_1
k : Type u_2
V : Type u_3
P : Type u_4
inst✝⁴ : Ring k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
inst✝ : Nonempty ι
s : Finset ι
w : ι → k
h : ∑ i ∈ s, w i = 1
p : ι → P
⊢ (Finset.affineCombination k s p) w ∈ affineSpan k (Set.range p)

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
c : ℝ≥0
hc : 0 < c
r : ℝ
x : E
⊢ (c • p).closedBall x r = p.closedBall x (r / ↑c)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s₁ s₂ : AffineSubspace k P
⊢ s₁ ∥ s₂ ↔ s₁.direction = s₂.direction ∧ (s₁ = ⊥ ↔ s₂ = ⊥)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s₁ s₂ : Set P
h : affineSpan k s₁ ∥ affineSpan k s₂
⊢ vectorSpan k s₁ = vectorSpan k s₂

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝⁴ : DivisionRing k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
ι : Type u_4
s : Finset ι
p : ι → P
hi : ∀ i ∈ s, ∀ j ∈ s, p i = p j → i = j
ps : Set P
inst✝ : Fintype ↑ps
hps : ps = p '' ↑s
f : ↑(p '' ↑s) → ι := fun x ↦ Exists.choose ⋯
hf : ∀ (x : ↑(p '' ↑s)), f x ∈ s ∧ p (f x) = ↑x
f' : ↑ps → ι := fun x ↦ f ⟨↑x, ⋯⟩
hf' : ∀ (x : ↑ps), f' x ∈ s ∧ p (f' x) = ↑x
hf'i : Function.Injective f'
f'e : ↑ps ↪ ι := { toFun := f', inj' := hf'i }
⊢ map f'e univ = s

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p q : Seminorm 𝕜 E
e : E
r : ℝ
⊢ (p ⊔ q).ball e r = p.ball e r ∩ q.ball e r

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
s₁ s₂ : Set P
⊢ affineSpan k s₁ ∥ affineSpan k s₂ ↔ vectorSpan k s₁ = vectorSpan k s₂ ∧ (s₁ = ∅ ↔ s₂ = ∅)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
p₁ p₂ p₃ p₄ : P
⊢ line[k, p₁, p₂] ∥ line[k, p₃, p₄] ↔ vectorSpan k {p₁, p₂} = vectorSpan k {p₃, p₄}

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Combination

Goal state before:
pp: ι : Type u_1
k : Type u_2
V : Type u_3
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
v : V
p : ι → P
i0 : ι
l : ι →₀ k
left✝ : l ∈ Finsupp.supported k k Set.univ
hv : (Finsupp.linearCombination k fun i ↦ p i -ᵥ p i0) l = v
w : ι → k := ⇑l - Function.update (Function.const ι 0) i0 (∑ i ∈ l.support, l i)
hwdef : w = ⇑l - Function.update (Function.const ι 0) i0 (∑ i ∈ l.support, l i)
⊢ ∑ i ∈ insert i0 l.support, w i = 0

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝⁵ : Ring k
inst✝⁴ : AddCommGroup V
inst✝³ : Module k V
inst✝² : AffineSpace V P
inst✝¹ : IsDomain k
inst✝ : Module.IsTorsionFree k V
p₁ q₁ p₂ q₂ : P
⊢ line[k, p₁, q₁] ∥ line[k, p₂, q₂] ↔ ∃ z, z • (q₁ -ᵥ p₁) = q₂ -ᵥ p₂

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p q : Seminorm 𝕜 E
e : E
r : ℝ
⊢ (p ⊔ q).closedBall e r = p.closedBall e r ∩ q.closedBall e r

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝⁵ : Ring k
inst✝⁴ : AddCommGroup V
inst✝³ : Module k V
inst✝² : AffineSpace V P
inst✝¹ : IsDomain k
inst✝ : Module.IsTorsionFree k V
p₁ q₁ p₂ q₂ : P
x✝ : ∃ z, z • (q₁ -ᵥ p₁) = q₂ -ᵥ p₂
z : kˣ
hz : z • (q₁ -ᵥ p₁) = q₂ -ᵥ p₂
⊢ z⁻¹ • (q₂ -ᵥ p₂) = q₁ -ᵥ p₁

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝⁵ : Ring k
inst✝⁴ : AddCommGroup V
inst✝³ : Module k V
inst✝² : AffineSpace V P
inst✝¹ : IsDomain k
inst✝ : Module.IsTorsionFree k V
p₁ q₁ p₂ q₂ : P
x✝ : ∃ z, z • (q₂ -ᵥ p₂) = q₁ -ᵥ p₁
z : kˣ
hz : z • (q₂ -ᵥ p₂) = q₁ -ᵥ p₁
⊢ z⁻¹ • (q₁ -ᵥ p₁) = q₂ -ᵥ p₂

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝⁵ : Ring k
inst✝⁴ : AddCommGroup V
inst✝³ : Module k V
inst✝² : AffineSpace V P
inst✝¹ : IsDomain k
inst✝ : Module.IsTorsionFree k V
p₁ q₁ p₂ q₂ : P
⊢ line[k, p₁, q₁] ∥ line[k, p₂, q₂] ↔ ∃ z, z • (q₂ -ᵥ p₂) = q₁ -ᵥ p₁

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
ι : Type u_11
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : ι → Seminorm 𝕜 E
s : Finset ι
H : s.Nonempty
e : E
r : ℝ
⊢ (s.sup' H p).ball e r = s.inf' H fun i ↦ (p i).ball e r

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
ι : Type u_11
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : ι → Seminorm 𝕜 E
s : Finset ι
H : s.Nonempty
e : E
r : ℝ
⊢ (s.sup' H p).closedBall e r = s.inf' H fun i ↦ (p i).closedBall e r

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝⁴ : DivisionRing k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
ι : Type u_4
s : Finset ι
p : ι → P
hi : ∀ i ∈ s, ∀ j ∈ s, p i = p j → i = j
ps : Set P
inst✝ : Fintype ↑ps
hps : ps = p '' ↑s
⊢ centroid k s p = centroid k univ fun x ↦ ↑x

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝³ : DivisionRing k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
ι : Type u_4
s : Finset ι
ι₂ : Type u_5
s₂ : Finset ι₂
p : ι → P
hi : ∀ i ∈ s, ∀ j ∈ s, p i = p j → i = j
p₂ : ι₂ → P
hi₂ : ∀ i ∈ s₂, ∀ j ∈ s₂, p₂ i = p₂ j → i = j
he : p '' ↑s = p₂ '' ↑s₂
⊢ centroid k s p = centroid k s₂ p₂

Tactic:
rw [s.centroid_eq_centroid_image_of_inj_on k hi rfl,
      s₂.centroid_eq_centroid_image_of_inj_on k hi₂ he]

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
r₁ r₂ : ℝ
x₁ x₂ : E
⊢ p.ball x₁ r₁ + p.ball x₂ r₂ ⊆ p.ball (x₁ + x₂) (r₁ + r₂)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝³ : DivisionRing k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
ι : Type u_4
s : Finset ι
ι₂ : Type u_5
s₂ : Finset ι₂
p : ι → P
hi : ∀ i ∈ s, ∀ j ∈ s, p i = p j → i = j
p₂ : ι₂ → P
hi₂ : ∀ i ∈ s₂, ∀ j ∈ s₂, p₂ i = p₂ j → i = j
he : p '' ↑s = p₂ '' ↑s₂
⊢ centroid k s p = centroid k s₂ p₂

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.Centroid

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_3
inst✝⁴ : DivisionRing k
inst✝³ : AddCommGroup V
inst✝² : Module k V
inst✝¹ : AffineSpace V P
ι : Type u_4
s : Finset ι
inst✝ : CharZero k
p : ι → P
p₀ : P
hs : s.Nonempty
⊢ centroid k s p -ᵥ p₀ = centroid k s fun i ↦ p i -ᵥ p₀

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Seminorm

Goal state before:
pp: 𝕜 : Type u_3
E : Type u_7
inst✝² : SeminormedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : SMul 𝕜 E
p : Seminorm 𝕜 E
r₁ r₂ : ℝ
x₁ x₂ : E
⊢ p.closedBall x₁ r₁ + p.closedBall x₂ r₂ ⊆ p.closedBall (x₁ + x₂) (r₁ + r₂)

Tactic:
by

Goal state after:
Module: Mathlib.LinearAlgebra.AffineSpace.AffineSubspace.Basic

Goal state before:
pp: k : Type u_1
V : Type u_2
P : Type u_4
inst✝³ : Ring k
inst✝² : AddCommGroup V
inst✝¹ : Module k V
inst✝ : AffineSpace V P
p₁ q₁ p₂ q₂ : P
⊢ line[k, p₁, q₁].direction ≤ line[k, p₂, q₂].direction ↔ ∃ z, z • (q₂ -ᵥ p₂) = q₁ -ᵥ p₁

Tactic:
by

Goal state after: