Theorem 3optocl 4737

Description: Implicit substitution of classes for ordered pairs. (Contributed by NM, 12-Mar-1995.)

Hypotheses

Ref	Expression
3optocl.1	⊢ 𝑅 = (𝐷 × 𝐹)
3optocl.2	⊢ (⟨𝑥, 𝑦⟩ = 𝐴 → (𝜑 ↔ 𝜓))
3optocl.3	⊢ (⟨𝑧, 𝑤⟩ = 𝐵 → (𝜓 ↔ 𝜒))
3optocl.4	⊢ (⟨𝑣, 𝑢⟩ = 𝐶 → (𝜒 ↔ 𝜃))
3optocl.5	⊢ (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐹) ∧ (𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐹) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹)) → 𝜑)

Assertion

Ref	Expression
3optocl	⊢ ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅 ∧ 𝐶 ∈ 𝑅) → 𝜃)

Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝑣,𝑢,𝐴   𝑧,𝐵,𝑤,𝑣,𝑢   𝑣,𝐶,𝑢   𝑥,𝐷,𝑦,𝑧,𝑤,𝑣,𝑢   𝑥,𝐹,𝑦,𝑧,𝑤,𝑣,𝑢   𝑧,𝑅,𝑤,𝑣,𝑢   𝜓,𝑥,𝑦   𝜒,𝑧,𝑤   𝜃,𝑣,𝑢

Allowed substitution hints:   𝜑(𝑥,𝑦,𝑧,𝑤,𝑣,𝑢)   𝜓(𝑧,𝑤,𝑣,𝑢)   𝜒(𝑥,𝑦,𝑣,𝑢)   𝜃(𝑥,𝑦,𝑧,𝑤)   𝐵(𝑥,𝑦)   𝐶(𝑥,𝑦,𝑧,𝑤)   𝑅(𝑥,𝑦)

Proof of Theorem 3optocl

Step	Hyp	Ref	Expression
1		3optocl.1	. . . 4 ⊢ 𝑅 = (𝐷 × 𝐹)
2		3optocl.4	. . . . 5 ⊢ (⟨𝑣, 𝑢⟩ = 𝐶 → (𝜒 ↔ 𝜃))
3	2	imbi2d 230	. . . 4 ⊢ (⟨𝑣, 𝑢⟩ = 𝐶 → (((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) → 𝜒) ↔ ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) → 𝜃)))
4		3optocl.2	. . . . . . 7 ⊢ (⟨𝑥, 𝑦⟩ = 𝐴 → (𝜑 ↔ 𝜓))
5	4	imbi2d 230	. . . . . 6 ⊢ (⟨𝑥, 𝑦⟩ = 𝐴 → (((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → 𝜑) ↔ ((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → 𝜓)))
6		3optocl.3	. . . . . . 7 ⊢ (⟨𝑧, 𝑤⟩ = 𝐵 → (𝜓 ↔ 𝜒))
7	6	imbi2d 230	. . . . . 6 ⊢ (⟨𝑧, 𝑤⟩ = 𝐵 → (((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → 𝜓) ↔ ((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → 𝜒)))
8		3optocl.5	. . . . . . 7 ⊢ (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐹) ∧ (𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐹) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹)) → 𝜑)
9	8	3expia 1207	. . . . . 6 ⊢ (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐹) ∧ (𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐹)) → ((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → 𝜑))
10	1, 5, 7, 9	2optocl 4736	. . . . 5 ⊢ ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) → ((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → 𝜒))
11	10	com12 30	. . . 4 ⊢ ((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) → 𝜒))
12	1, 3, 11	optocl 4735	. . 3 ⊢ (𝐶 ∈ 𝑅 → ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) → 𝜃))
13	12	impcom 125	. 2 ⊢ (((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) ∧ 𝐶 ∈ 𝑅) → 𝜃)
14	13	3impa 1196	1 ⊢ ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅 ∧ 𝐶 ∈ 𝑅) → 𝜃)

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   ∧ w3a 980   = wceq 1364   ∈ wcel 2164  ⟨cop 3621   × cxp 4657

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-v 2762  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-opab 4091  df-xp 4665

This theorem is referenced by:  ecopovtrn  6686  ecopovtrng  6689