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Mirrors > Home > MPE Home > Th. List > rabid2 | Structured version Visualization version GIF version |
Description: An "identity" law for restricted class abstraction. (Contributed by NM, 9-Oct-2003.) (Proof shortened by Andrew Salmon, 30-May-2011.) |
Ref | Expression |
---|---|
rabid2 | ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ ∀𝑥 ∈ 𝐴 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | abeq2 2862 | . . 3 ⊢ (𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
2 | pm4.71 561 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 → 𝜑) ↔ (𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
3 | 2 | albii 1827 | . . 3 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) |
4 | 1, 3 | bitr4i 281 | . 2 ⊢ (𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) |
5 | df-rab 3060 | . . 3 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} | |
6 | 5 | eqeq2i 2749 | . 2 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ 𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)}) |
7 | df-ral 3056 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
8 | 4, 6, 7 | 3bitr4i 306 | 1 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ ∀𝑥 ∈ 𝐴 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∀wal 1541 = wceq 1543 ∈ wcel 2112 {cab 2714 ∀wral 3051 {crab 3055 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-tru 1546 df-ex 1788 df-nf 1792 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ral 3056 df-rab 3060 |
This theorem is referenced by: rabxm 4287 iinrab2 4964 riinrab 4978 class2seteq 5231 dmmptg 6085 frpoinsg 6175 wfisg 6183 dmmptd 6501 fneqeql 6844 fmpt 6905 zfrep6 7706 axdc2lem 10027 ioomax 12975 iccmax 12976 hashbc 13982 lcmf0 16154 dfphi2 16290 phiprmpw 16292 phisum 16306 isnsg4 18537 symggen2 18817 psgnfvalfi 18859 lssuni 19930 psgnghm2 20497 ocv0 20593 dsmmfi 20654 frlmfibas 20678 frlmlbs 20713 psr1baslem 21060 ordtrest2lem 22054 comppfsc 22383 xkouni 22450 xkoccn 22470 tsmsfbas 22979 clsocv 24101 ehlbase 24266 ovolicc2lem4 24371 itg2monolem1 24602 musum 26027 lgsquadlem2 26216 umgr2v2evd2 27569 frgrregorufr0 28361 ubthlem1 28905 xrsclat 30962 psgndmfi 31038 zarcls0 31486 ordtrest2NEWlem 31540 hasheuni 31719 measvuni 31848 imambfm 31895 subfacp1lem6 32814 connpconn 32864 cvmliftmolem2 32911 cvmlift2lem12 32943 tfisg 33456 frinsg 33462 poimirlem28 35491 fdc 35589 isbnd3 35628 pmap1N 37467 pol1N 37610 dia1N 38753 dihwN 38989 vdioph 40245 fiphp3d 40285 dmmptdf 42377 stirlinglem14 43246 fvmptrabdm 44400 suppdm 45467 |
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