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Mirrors > Home > MPE Home > Th. List > elopabi | Structured version Visualization version GIF version |
Description: A consequence of membership in an ordered-pair class abstraction, using ordered pair extractors. (Contributed by NM, 29-Aug-2006.) |
Ref | Expression |
---|---|
elopabi.1 | ⊢ (𝑥 = (1st ‘𝐴) → (𝜑 ↔ 𝜓)) |
elopabi.2 | ⊢ (𝑦 = (2nd ‘𝐴) → (𝜓 ↔ 𝜒)) |
Ref | Expression |
---|---|
elopabi | ⊢ (𝐴 ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑} → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relopabv 5827 | . . . 4 ⊢ Rel {⟨𝑥, 𝑦⟩ ∣ 𝜑} | |
2 | 1st2nd 8049 | . . . 4 ⊢ ((Rel {⟨𝑥, 𝑦⟩ ∣ 𝜑} ∧ 𝐴 ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑}) → 𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩) | |
3 | 1, 2 | mpan 688 | . . 3 ⊢ (𝐴 ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑} → 𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩) |
4 | id 22 | . . 3 ⊢ (𝐴 ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑} → 𝐴 ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑}) | |
5 | 3, 4 | eqeltrrd 2830 | . 2 ⊢ (𝐴 ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑} → ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑}) |
6 | fvex 6915 | . . 3 ⊢ (1st ‘𝐴) ∈ V | |
7 | fvex 6915 | . . 3 ⊢ (2nd ‘𝐴) ∈ V | |
8 | elopabi.1 | . . 3 ⊢ (𝑥 = (1st ‘𝐴) → (𝜑 ↔ 𝜓)) | |
9 | elopabi.2 | . . 3 ⊢ (𝑦 = (2nd ‘𝐴) → (𝜓 ↔ 𝜒)) | |
10 | 6, 7, 8, 9 | opelopab 5548 | . 2 ⊢ (⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑} ↔ 𝜒) |
11 | 5, 10 | sylib 217 | 1 ⊢ (𝐴 ∈ {⟨𝑥, 𝑦⟩ ∣ 𝜑} → 𝜒) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 = wceq 1533 ∈ wcel 2098 ⟨cop 4638 {copab 5214 Rel wrel 5687 ‘cfv 6553 1st c1st 7997 2nd c2nd 7998 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2699 ax-sep 5303 ax-nul 5310 ax-pr 5433 ax-un 7746 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-ral 3059 df-rex 3068 df-rab 3431 df-v 3475 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-nul 4327 df-if 4533 df-sn 4633 df-pr 4635 df-op 4639 df-uni 4913 df-br 5153 df-opab 5215 df-mpt 5236 df-id 5580 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-iota 6505 df-fun 6555 df-fv 6561 df-1st 7999 df-2nd 8000 |
This theorem is referenced by: vciOLD 30391 sat1el2xp 35022 drngoi 37457 dicelval1sta 40692 |
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