Theorem 3optocl 4617

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 229	. . . 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 229	. . . . . 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 229	. . . . . 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 1183	. . . . . 6 ⊢ (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐹) ∧ (𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐹)) → ((𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐹) → 𝜑))
10	1, 5, 7, 9	2optocl 4616	. . . . 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 4615	. . 3 ⊢ (𝐶 ∈ 𝑅 → ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) → 𝜃))
13	12	impcom 124	. 2 ⊢ (((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅) ∧ 𝐶 ∈ 𝑅) → 𝜃)
14	13	3impa 1176	1 ⊢ ((𝐴 ∈ 𝑅 ∧ 𝐵 ∈ 𝑅 ∧ 𝐶 ∈ 𝑅) → 𝜃)

Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   ∧ w3a 962   = wceq 1331   ∈ wcel 1480  ⟨cop 3530   × cxp 4537

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121  ax-sep 4046  ax-pow 4098  ax-pr 4131

This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-ral 2421  df-rex 2422  df-v 2688  df-un 3075  df-in 3077  df-ss 3084  df-pw 3512  df-sn 3533  df-pr 3534  df-op 3536  df-opab 3990  df-xp 4545

This theorem is referenced by:  ecopovtrn  6526  ecopovtrng  6529