Theorem: PadicSeq.add_eq_max_of_ne
File: Mathlib/NumberTheory/Padics/PadicNumbers.lean

tactic: have : LimZero (f - 0) := hf
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : f ≈ 0
⊢ norm (f + g) = max (norm f) (norm g)

tactic: have : f + g ≈ g := show LimZero (f + g - g) by simpa only [sub_zero, add_sub_cancel]
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : f ≈ 0
this : LimZero (f - 0)
⊢ norm (f + g) = max (norm f) (norm g)

tactic: have h1 : (f + g).norm = g.norm := norm_equiv this
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : f ≈ 0
this✝ : LimZero (f - 0)
this : f + g ≈ g
⊢ norm (f + g) = max (norm f) (norm g)

tactic: have h2 : f.norm = 0 := (norm_zero_iff _).2 hf
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : f ≈ 0
this✝ : LimZero (f - 0)
this : f + g ≈ g
h1 : norm (f + g) = norm g
⊢ norm (f + g) = max (norm f) (norm g)

tactic: rw [h1, h2, max_eq_right (norm_nonneg _)]
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : f ≈ 0
this✝ : LimZero (f - 0)
this : f + g ≈ g
h1 : norm (f + g) = norm g
h2 : norm f = 0
⊢ norm (f + g) = max (norm f) (norm g)

tactic: simpa only [sub_zero, add_sub_cancel]
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : f ≈ 0
this : LimZero (f - 0)
⊢ LimZero (f + g - g)

tactic: have : LimZero (g - 0) := hg
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : g ≈ 0
⊢ norm (f + g) = max (norm f) (norm g)

tactic: have : f + g ≈ f := show LimZero (f + g - f) by rw [add_sub_cancel']; simpa only [sub_zero]
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : g ≈ 0
this : LimZero (g - 0)
⊢ norm (f + g) = max (norm f) (norm g)

tactic: have h1 : (f + g).norm = f.norm := norm_equiv this
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : g ≈ 0
this✝ : LimZero (g - 0)
this : f + g ≈ f
⊢ norm (f + g) = max (norm f) (norm g)

tactic: have h2 : g.norm = 0 := (norm_zero_iff _).2 hg
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : g ≈ 0
this✝ : LimZero (g - 0)
this : f + g ≈ f
h1 : norm (f + g) = norm f
⊢ norm (f + g) = max (norm f) (norm g)

tactic: rw [h1, h2, max_eq_left (norm_nonneg _)]
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : g ≈ 0
this✝ : LimZero (g - 0)
this : f + g ≈ f
h1 : norm (f + g) = norm f
h2 : norm g = 0
⊢ norm (f + g) = max (norm f) (norm g)

tactic: rw [add_sub_cancel']
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : g ≈ 0
this : LimZero (g - 0)
⊢ LimZero (f + g - f)

tactic: simpa only [sub_zero]
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : g ≈ 0
this : LimZero (g - 0)
⊢ LimZero g

tactic: unfold norm at hfgne⊢
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne : norm f ≠ norm g
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
⊢ norm (f + g) = max (norm f) (norm g)

tactic: split_ifs  at hfgne⊢
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfgne :
  (if hf : f ≈ 0 then 0 else padicNorm p (↑f (stationaryPoint hf))) ≠
    if hf : g ≈ 0 then 0 else padicNorm p (↑g (stationaryPoint hf))
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
⊢ (if hf : f + g ≈ 0 then 0 else padicNorm p (↑(f + g) (stationaryPoint hf))) =
    max (if hf : f ≈ 0 then 0 else padicNorm p (↑f (stationaryPoint hf)))
      (if hf : g ≈ 0 then 0 else padicNorm p (↑g (stationaryPoint hf)))

tactic: rw [lift_index_left hf, lift_index_right hg] at hfgne
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ padicNorm p (↑(f + g) (stationaryPoint hfg)) =
    max (padicNorm p (↑f (stationaryPoint hf))) (padicNorm p (↑g (stationaryPoint hg)))

tactic: rw [lift_index_left_left hfg, lift_index_left hf, lift_index_right hg]
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ padicNorm p (↑(f + g) (stationaryPoint hfg)) =
    max (padicNorm p (↑f (stationaryPoint hf))) (padicNorm p (↑g (stationaryPoint hg)))

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v2
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

tactic: exact padicNorm.add_eq_max_of_ne hfgne
state_before: p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ padicNorm p (↑(f + g) (max (stationaryPoint hfg) (max ?v2 ?v3))) =
    max (padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))))
      (padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg)))))

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v2
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v2
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v2
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v2
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝¹ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne✝ : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne :
  padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (max ?v1 (max ?v2 (stationaryPoint hg))))
⊢ ℕ

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v2
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne✝ : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
hfgne : padicNorm p (↑f (max ?v1 (max (stationaryPoint hf) ?v3))) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v1
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ

case v3
p : ℕ
hp : Fact (Nat.Prime p)
f g : PadicSeq p
hfg : ¬f + g ≈ 0
hf : ¬f ≈ 0
hg : ¬g ≈ 0
hfgne : padicNorm p (↑f (stationaryPoint hf)) ≠ padicNorm p (↑g (stationaryPoint hg))
⊢ ℕ