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Theorem 2optocl 2470
Description: Implicit substitution of classes for ordered pairs.
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 group(s):   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

Proof of Theorem 2optocl
StepHypRef Expression
1 2optocl.1 . . . 4 R = (C × D)
2 2optocl.3 . . . . 5 (⟨z, w⟩ = B → (ψχ))
32imbi2d 464 . . . 4 (⟨z, w⟩ = B → ((ARψ) ↔ (ARχ)))
4 2optocl.2 . . . . . . 7 (⟨x, y⟩ = A → (φψ))
54imbi2d 464 . . . . . 6 (⟨x, y⟩ = A → (((zCwD) → φ) ↔ ((zCwD) → ψ)))
6 2optocl.4 . . . . . . 7 (((xCyD) ∧ (zCwD)) → φ)
76exp 291 . . . . . 6 ((xCyD) → ((zCwD) → φ))
81, 5, 7optocl 2469 . . . . 5 (AR → ((zCwD) → ψ))
98com12 13 . . . 4 ((zCwD) → (ARψ))
101, 3, 9optocl 2469 . . 3 (BR → (ARχ))
1110com12 13 . 2 (AR → (BRχ))
1211imp 277 1 ((ARBR) → χ)
Colors of variables: wff set class
Syntax hints:   → wi 2   ↔ wb 127   ∧ wa 196   = wceq 1091   ∈ wcel 1092  ⟨cop 1810   × cxp 2408
This theorem is referenced by:  3optocl 2471  ecopoprsym 3246  th3qlem2 3251  axaddcl 4066  axmulcl 4068
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-opab 2098  df-xp 2424
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