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Theorem 2optocl 4832
Description: Implicit substitution of classes for ordered pairs. (Contributed by NM, 12-Mar-1995.)
Hypotheses
Ref Expression
2optocl.1 𝑅 = (𝐶 × 𝐷)
2optocl.2 (⟨𝑥, 𝑦⟩ = 𝐴 → (𝜑𝜓))
2optocl.3 (⟨𝑧, 𝑤⟩ = 𝐵 → (𝜓𝜒))
2optocl.4 (((𝑥𝐶𝑦𝐷) ∧ (𝑧𝐶𝑤𝐷)) → 𝜑)
Assertion
Ref Expression
2optocl ((𝐴𝑅𝐵𝑅) → 𝜒)
Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝐴   𝑧,𝐵,𝑤   𝑥,𝐶,𝑦,𝑧,𝑤   𝑥,𝐷,𝑦,𝑧,𝑤   𝜓,𝑥,𝑦   𝜒,𝑧,𝑤   𝑧,𝑅,𝑤
Allowed substitution hints:   𝜑(𝑥,𝑦,𝑧,𝑤)   𝜓(𝑧,𝑤)   𝜒(𝑥,𝑦)   𝐵(𝑥,𝑦)   𝑅(𝑥,𝑦)

Proof of Theorem 2optocl
StepHypRef Expression
1 2optocl.1 . . 3 𝑅 = (𝐶 × 𝐷)
2 2optocl.3 . . . 4 (⟨𝑧, 𝑤⟩ = 𝐵 → (𝜓𝜒))
32imbi2d 230 . . 3 (⟨𝑧, 𝑤⟩ = 𝐵 → ((𝐴𝑅𝜓) ↔ (𝐴𝑅𝜒)))
4 2optocl.2 . . . . . 6 (⟨𝑥, 𝑦⟩ = 𝐴 → (𝜑𝜓))
54imbi2d 230 . . . . 5 (⟨𝑥, 𝑦⟩ = 𝐴 → (((𝑧𝐶𝑤𝐷) → 𝜑) ↔ ((𝑧𝐶𝑤𝐷) → 𝜓)))
6 2optocl.4 . . . . . 6 (((𝑥𝐶𝑦𝐷) ∧ (𝑧𝐶𝑤𝐷)) → 𝜑)
76ex 115 . . . . 5 ((𝑥𝐶𝑦𝐷) → ((𝑧𝐶𝑤𝐷) → 𝜑))
81, 5, 7optocl 4831 . . . 4 (𝐴𝑅 → ((𝑧𝐶𝑤𝐷) → 𝜓))
98com12 30 . . 3 ((𝑧𝐶𝑤𝐷) → (𝐴𝑅𝜓))
101, 3, 9optocl 4831 . 2 (𝐵𝑅 → (𝐴𝑅𝜒))
1110impcom 125 1 ((𝐴𝑅𝐵𝑅) → 𝜒)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1398  wcel 2205  cop 3697   × cxp 4752
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2208  ax-ext 2216  ax-sep 4233  ax-pow 4292  ax-pr 4327
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-un 3218  df-in 3220  df-ss 3227  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-opab 4177  df-xp 4760
This theorem is referenced by:  3optocl  4833  ecopovsym  6878  ecopovsymg  6881  th3qlem2  6885  axaddcom  8201
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