theorem extracted_formal_statement_37.{u_3, u_2, u_1} {E₁ : Type u_1} {E₂ : Type u_2} {F : Type u_3}
  [inst : NormedAddCommGroup E₁] [inst_1 : InnerProductSpace ℝ E₁] [inst_2 : FiniteDimensional ℝ E₁]
  [inst_3 : NormedAddCommGroup E₂] [inst_4 : InnerProductSpace ℝ E₂] [inst_5 : FiniteDimensional ℝ E₂]
  [inst_6 : NormedAddCommGroup F] [inst_7 : InnerProductSpace ℝ F] [inst_8 : FiniteDimensional ℝ F]
  {admm : ADMM E₁ E₂ F} {admm_kkt : Existance_of_kkt admm} [inst_9 : Setting E₁ E₂ F admm admm_kkt] (n : ℕ) :
  let pm1 := 1 / (ADMM.τ E₁ E₂ F * ADMM.ρ E₁ E₂ F);
  let pm2 := (1 - ADMM.τ E₁ E₂ F) * ADMM.ρ E₁ E₂ F;
  pm1 * ⟪ey (n + 1), ey n - ey (n + 1)⟫_ℝ =
      ⟪ey (n + 1), -((OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1)))⟫_ℝ →
    pm2 *
          ‖(OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) - OptProblem.b E₁ E₂‖ ^
            2 =
        pm2 * ‖(OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1))‖ ^ 2 →
      ADMM.ρ E₁ E₂ F *
              ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n),
                (OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
                  OptProblem.b E₁ E₂⟫_ℝ -
            ADMM.ρ E₁ E₂ F *
              ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n), (OptProblem.A₂ E₁) (e₂ (n + 1))⟫_ℝ =
          ADMM.ρ E₁ E₂ F *
            ⟪-(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F n - ADMM.x₂ E₁ F (n + 1)), (OptProblem.A₁ E₂) (e₁ (n + 1))⟫_ℝ →
        1 / (ADMM.τ E₁ E₂ F * ADMM.ρ E₁ E₂ F) * ⟪ey (n + 1), ey n - ey (n + 1)⟫_ℝ -
                  (1 - ADMM.τ E₁ E₂ F) * ADMM.ρ E₁ E₂ F *
                    ‖(OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
                          OptProblem.b E₁ E₂‖ ^
                      2 +
                ADMM.ρ E₁ E₂ F *
                  ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n),
                    (OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
                      OptProblem.b E₁ E₂⟫_ℝ -
              ADMM.ρ E₁ E₂ F *
                ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n), (OptProblem.A₂ E₁) (e₂ (n + 1))⟫_ℝ ≥
            0 →
          ⟪ey (n + 1), -((OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1)))⟫_ℝ -
                pm2 * ‖(OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1))‖ ^ 2 +
              ADMM.ρ E₁ E₂ F *
                ⟪-(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F n - ADMM.x₂ E₁ F (n + 1)), (OptProblem.A₁ E₂) (e₁ (n + 1))⟫_ℝ ≥
            0 := sorry

State before:
E₁ : Type u_1
E₂ : Type u_2
F : Type u_3
inst✝⁹ : NormedAddCommGroup E₁
inst✝⁸ : InnerProductSpace ℝ E₁
inst✝⁷ : FiniteDimensional ℝ E₁
inst✝⁶ : NormedAddCommGroup E₂
inst✝⁵ : InnerProductSpace ℝ E₂
inst✝⁴ : FiniteDimensional ℝ E₂
inst✝³ : NormedAddCommGroup F
inst✝² : InnerProductSpace ℝ F
inst✝¹ : FiniteDimensional ℝ F
admm : ADMM E₁ E₂ F
admm_kkt : Existance_of_kkt admm
inst✝ : Setting E₁ E₂ F admm admm_kkt
n : ℕ
pm1 : ℝ := 1 / (ADMM.τ E₁ E₂ F * ADMM.ρ E₁ E₂ F)
pm2 : ℝ := (1 - ADMM.τ E₁ E₂ F) * ADMM.ρ E₁ E₂ F
h1 :
  pm1 * ⟪ey (n + 1), ey n - ey (n + 1)⟫_ℝ =
    ⟪ey (n + 1), -((OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1)))⟫_ℝ
h2 :
  pm2 *
      ‖(OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) - OptProblem.b E₁ E₂‖ ^ 2 =
    pm2 * ‖(OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1))‖ ^ 2
h3 :
  ADMM.ρ E₁ E₂ F *
        ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n),
          (OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
            OptProblem.b E₁ E₂⟫_ℝ -
      ADMM.ρ E₁ E₂ F * ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n), (OptProblem.A₂ E₁) (e₂ (n + 1))⟫_ℝ =
    ADMM.ρ E₁ E₂ F * ⟪-(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F n - ADMM.x₂ E₁ F (n + 1)), (OptProblem.A₁ E₂) (e₁ (n + 1))⟫_ℝ
⊢ 1 / (ADMM.τ E₁ E₂ F * ADMM.ρ E₁ E₂ F) * ⟪ey (n + 1), ey n - ey (n + 1)⟫_ℝ -
          (1 - ADMM.τ E₁ E₂ F) * ADMM.ρ E₁ E₂ F *
            ‖(OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
                  OptProblem.b E₁ E₂‖ ^
              2 +
        ADMM.ρ E₁ E₂ F *
          ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n),
            (OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
              OptProblem.b E₁ E₂⟫_ℝ -
      ADMM.ρ E₁ E₂ F * ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n), (OptProblem.A₂ E₁) (e₂ (n + 1))⟫_ℝ ≥
    0

Tactic: rw [h1, h2]
    have h4 :
  (inner (ey (n + 1)) (-((A₁ (e₁ (n + 1))) + A₂ (e₂ (n + 1))))) - pm2 * ‖admm.A₁ (e₁ (n + 1)) + A₂ (e₂ (n + 1))‖ ^ 2 +
      (ρ * (inner (A₂ (x₂ (n + 1) - x₂ n)) (A₁ (x₁ (n + 1)) + A₂ (x₂ (n + 1)) - b)) -
        ρ * (inner (A₂ (x₂ (n + 1) - x₂ n)) (A₂ (e₂ (n + 1))))) =
    (inner (ey (n + 1)) (-((A₁ (e₁ (n + 1))) + A₂ (e₂ (n + 1))))) - pm2 * ‖admm.A₁ (e₁ (n + 1)) + A₂ (e₂ (n + 1))‖ ^ 2 +
        ρ * (inner (A₂ (x₂ (n + 1) - x₂ n)) (A₁ (x₁ (n + 1)) + A₂ (x₂ (n + 1)) - b)) -
      ρ * (inner (A₂ (x₂ (n + 1) - x₂ n)) (A₂ (e₂ (n + 1)))) :=
  by ring
    rw [← h4, h3]

State after:
[E₁ : Type u_1
 E₂ : Type u_2
 F : Type u_3
 inst✝⁹ : NormedAddCommGroup E₁
 inst✝⁸ : InnerProductSpace ℝ E₁
 inst✝⁷ : FiniteDimensional ℝ E₁
 inst✝⁶ : NormedAddCommGroup E₂
 inst✝⁵ : InnerProductSpace ℝ E₂
 inst✝⁴ : FiniteDimensional ℝ E₂
 inst✝³ : NormedAddCommGroup F
 inst✝² : InnerProductSpace ℝ F
 inst✝¹ : FiniteDimensional ℝ F
 admm : ADMM E₁ E₂ F
 admm_kkt : Existance_of_kkt admm
 inst✝ : Setting E₁ E₂ F admm admm_kkt
 n : ℕ
 pm1 : ℝ := 1 / (ADMM.τ E₁ E₂ F * ADMM.ρ E₁ E₂ F)
 pm2 : ℝ := (1 - ADMM.τ E₁ E₂ F) * ADMM.ρ E₁ E₂ F
 h1 :
   pm1 * ⟪ey (n + 1), ey n - ey (n + 1)⟫_ℝ =
     ⟪ey (n + 1), -((OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1)))⟫_ℝ
 h2 :
   pm2 *
       ‖(OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) - OptProblem.b E₁ E₂‖ ^
         2 =
     pm2 * ‖(OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1))‖ ^ 2
 h3 :
   ADMM.ρ E₁ E₂ F *
         ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n),
           (OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
             OptProblem.b E₁ E₂⟫_ℝ -
       ADMM.ρ E₁ E₂ F *
         ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n), (OptProblem.A₂ E₁) (e₂ (n + 1))⟫_ℝ =
     ADMM.ρ E₁ E₂ F * ⟪-(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F n - ADMM.x₂ E₁ F (n + 1)), (OptProblem.A₁ E₂) (e₁ (n + 1))⟫_ℝ
 h4 :
   ⟪ey (n + 1), -((OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1)))⟫_ℝ -
         pm2 * ‖(OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1))‖ ^ 2 +
       (ADMM.ρ E₁ E₂ F *
           ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n),
             (OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
               OptProblem.b E₁ E₂⟫_ℝ -
         ADMM.ρ E₁ E₂ F *
           ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n), (OptProblem.A₂ E₁) (e₂ (n + 1))⟫_ℝ) =
     ⟪ey (n + 1), -((OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1)))⟫_ℝ -
           pm2 * ‖(OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1))‖ ^ 2 +
         ADMM.ρ E₁ E₂ F *
           ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n),
             (OptProblem.A₁ E₂) (ADMM.x₁ E₂ F (n + 1)) + (OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1)) -
               OptProblem.b E₁ E₂⟫_ℝ -
       ADMM.ρ E₁ E₂ F * ⟪(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (n + 1) - ADMM.x₂ E₁ F n), (OptProblem.A₂ E₁) (e₂ (n + 1))⟫_ℝ
 ⊢ ⟪ey (n + 1), -((OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1)))⟫_ℝ -
         pm2 * ‖(OptProblem.A₁ E₂) (e₁ (n + 1)) + (OptProblem.A₂ E₁) (e₂ (n + 1))‖ ^ 2 +
       ADMM.ρ E₁ E₂ F *
         ⟪-(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F n - ADMM.x₂ E₁ F (n + 1)), (OptProblem.A₁ E₂) (e₁ (n + 1))⟫_ℝ ≥
     0]

Relevant lemmas: