Theorem: LO.FirstOrder.Arith.Model.Exponential.exponential_succ_mul_two (Arithmetization/ISigmaZero/Exponential/Exp.lean)

State before:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
⊢ Exponential (x + 1) (2 * y) → Exponential x y
Tactic:
intro h
State after:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
h : Exponential (x + 1) (2 * y)
⊢ Exponential x y

State before:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
h : Exponential (x + 1) (2 * y)
⊢ Exponential x y
Tactic:
rcases exponential_succ.mp h with ⟨y', e, h⟩
State after:
case intro.intro
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
h✝ : Exponential (x + 1) (2 * y)
y' : M
e : 2 * y = 2 * y'
h : Exponential x y'
⊢ Exponential x y

State before:
case intro.intro
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
h✝ : Exponential (x + 1) (2 * y)
y' : M
e : 2 * y = 2 * y'
h : Exponential x y'
⊢ Exponential x y
Tactic:
simpa [show y = y' from by simpa using e] using h
State after:
no goals

State before:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
h✝ : Exponential (x + 1) (2 * y)
y' : M
e : 2 * y = 2 * y'
h : Exponential x y'
⊢ y = y'
Tactic:
simpa using e
State after:
no goals

State before:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
⊢ Exponential x y → Exponential (x + 1) (2 * y)
Tactic:
intro h
State after:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
h : Exponential x y
⊢ Exponential (x + 1) (2 * y)

State before:
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
x y : M
h : Exponential x y
⊢ Exponential (x + 1) (2 * y)
Tactic:
exact exponential_succ.mpr ⟨y, rfl, h⟩
State after:
no goals