import Mathlib
import Optlib


open Set InnerProductSpace Topology Filter InnerProduct

open scoped Pointwise

theorem extracted_formal_statement_48.{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+)
  (h_original_goal :
    1 / (ADMM.τ E₁ E₂ F * ADMM.ρ E₁ E₂ F) * (‖ey ↑n‖ ^ 2 - ‖ey (↑n + 1)‖ ^ 2) -
                (2 - 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 +
              2 * M (n + 1) -
            ADMM.ρ E₁ E₂ F * ‖(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (↑n + 1) - ADMM.x₂ E₁ F ↑n)‖ ^ 2 -
          ADMM.ρ E₁ E₂ F * ‖(OptProblem.A₂ E₁) (e₂ (↑n + 1))‖ ^ 2 +
        ADMM.ρ E₁ E₂ F * ‖(OptProblem.A₂ E₁) (e₂ ↑n)‖ ^ 2 ≥
      0) :
  0 ≤
    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 +
        M (n + 1) -
      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 := sorry

Tactic 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+
⊢ 1 / (ADMM.τ E₁ E₂ F * ADMM.ρ E₁ E₂ F) * (‖ey ↑n‖ ^ 2 - ‖ey (↑n + 1)‖ ^ 2) -
              (2 - 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 +
            2 * M (n + 1) -
          ADMM.ρ E₁ E₂ F * ‖(OptProblem.A₂ E₁) (ADMM.x₂ E₁ F (↑n + 1) - ADMM.x₂ E₁ F ↑n)‖ ^ 2 -
        ADMM.ρ E₁ E₂ F * ‖(OptProblem.A₂ E₁) (e₂ (↑n + 1))‖ ^ 2 +
      ADMM.ρ E₁ E₂ F * ‖(OptProblem.A₂ E₁) (e₂ ↑n)‖ ^ 2 ≥
    0

Tactic:
rw [Φ_isdescending_inequ5']
    apply mul_nonneg
    · norm_num

Tactic state after:
[case hb
 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+
 ⊢ 0 ≤
     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 +
         M (n + 1) -
       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]