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Theorem 2ecoptocl 8785
Description: Implicit substitution of classes for equivalence classes of ordered pairs. (Contributed by NM, 23-Jul-1995.)
Hypotheses
Ref Expression
2ecoptocl.1 𝑆 = ((𝐶 × 𝐷) / 𝑅)
2ecoptocl.2 ([⟨𝑥, 𝑦⟩]𝑅 = 𝐴 → (𝜑𝜓))
2ecoptocl.3 ([⟨𝑧, 𝑤⟩]𝑅 = 𝐵 → (𝜓𝜒))
2ecoptocl.4 (((𝑥𝐶𝑦𝐷) ∧ (𝑧𝐶𝑤𝐷)) → 𝜑)
Assertion
Ref Expression
2ecoptocl ((𝐴𝑆𝐵𝑆) → 𝜒)
Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝐴   𝑧,𝐵,𝑤   𝑥,𝐶,𝑦,𝑧,𝑤   𝑥,𝐷,𝑦,𝑧,𝑤   𝑧,𝑆,𝑤   𝑥,𝑅,𝑦,𝑧,𝑤   𝜓,𝑥,𝑦   𝜒,𝑧,𝑤
Allowed substitution hints:   𝜑(𝑥,𝑦,𝑧,𝑤)   𝜓(𝑧,𝑤)   𝜒(𝑥,𝑦)   𝐵(𝑥,𝑦)   𝑆(𝑥,𝑦)

Proof of Theorem 2ecoptocl
StepHypRef Expression
1 2ecoptocl.1 . . 3 𝑆 = ((𝐶 × 𝐷) / 𝑅)
2 2ecoptocl.3 . . . 4 ([⟨𝑧, 𝑤⟩]𝑅 = 𝐵 → (𝜓𝜒))
32imbi2d 342 . . 3 ([⟨𝑧, 𝑤⟩]𝑅 = 𝐵 → ((𝐴𝑆𝜓) ↔ (𝐴𝑆𝜒)))
4 2ecoptocl.2 . . . . . 6 ([⟨𝑥, 𝑦⟩]𝑅 = 𝐴 → (𝜑𝜓))
54imbi2d 342 . . . . 5 ([⟨𝑥, 𝑦⟩]𝑅 = 𝐴 → (((𝑧𝐶𝑤𝐷) → 𝜑) ↔ ((𝑧𝐶𝑤𝐷) → 𝜓)))
6 2ecoptocl.4 . . . . . 6 (((𝑥𝐶𝑦𝐷) ∧ (𝑧𝐶𝑤𝐷)) → 𝜑)
76ex 416 . . . . 5 ((𝑥𝐶𝑦𝐷) → ((𝑧𝐶𝑤𝐷) → 𝜑))
81, 5, 7ecoptocl 8784 . . . 4 (𝐴𝑆 → ((𝑧𝐶𝑤𝐷) → 𝜓))
98com12 32 . . 3 ((𝑧𝐶𝑤𝐷) → (𝐴𝑆𝜓))
101, 3, 9ecoptocl 8784 . 2 (𝐵𝑆 → (𝐴𝑆𝜒))
1110impcom 411 1 ((𝐴𝑆𝐵𝑆) → 𝜒)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208  wa 399   = wceq 1559  wcel 2141  cop 4587   × cxp 5643  [cec 8671   / cqs 8672
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-ext 2733
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-sb 2090  df-clab 2740  df-cleq 2753  df-clel 2836  df-rex 3086  df-rab 3414  df-v 3455  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-sn 4582  df-pr 4584  df-op 4588  df-br 5100  df-opab 5162  df-xp 5651  df-cnv 5653  df-dm 5655  df-rn 5656  df-res 5657  df-ima 5658  df-ec 8675  df-qs 8679
This theorem is referenced by:  3ecoptocl  8786  ecovcom  8800  addclsr  11038  mulclsr  11039  ltsosr  11049  mulgt0sr  11060
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