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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 2945 | . . 3 ⊢ (𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
2 | pm4.71 560 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 → 𝜑) ↔ (𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
3 | 2 | albii 1820 | . . 3 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) |
4 | 1, 3 | bitr4i 280 | . 2 ⊢ (𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) |
5 | df-rab 3147 | . . 3 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} | |
6 | 5 | eqeq2i 2834 | . 2 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ 𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)}) |
7 | df-ral 3143 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
8 | 4, 6, 7 | 3bitr4i 305 | 1 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ ∀𝑥 ∈ 𝐴 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∀wal 1535 = wceq 1537 ∈ wcel 2114 {cab 2799 ∀wral 3138 {crab 3142 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-ral 3143 df-rab 3147 |
This theorem is referenced by: rabxm 4340 iinrab2 4992 riinrab 5006 class2seteq 5255 dmmptg 6096 wfisg 6183 dmmptd 6493 fneqeql 6816 fmpt 6874 zfrep6 7656 axdc2lem 9870 ioomax 12812 iccmax 12813 hashbc 13812 lcmf0 15978 dfphi2 16111 phiprmpw 16113 phisum 16127 isnsg4 18319 symggen2 18599 psgnfvalfi 18641 lssuni 19711 psr1baslem 20353 psgnghm2 20725 ocv0 20821 dsmmfi 20882 frlmfibas 20906 frlmlbs 20941 ordtrest2lem 21811 comppfsc 22140 xkouni 22207 xkoccn 22227 tsmsfbas 22736 clsocv 23853 ehlbase 24018 ovolicc2lem4 24121 itg2monolem1 24351 musum 25768 lgsquadlem2 25957 umgr2v2evd2 27309 frgrregorufr0 28103 ubthlem1 28647 xrsclat 30667 psgndmfi 30740 ordtrest2NEWlem 31165 hasheuni 31344 measvuni 31473 imambfm 31520 subfacp1lem6 32432 connpconn 32482 cvmliftmolem2 32529 cvmlift2lem12 32561 tfisg 33055 frpoinsg 33081 frinsg 33087 poimirlem28 34935 fdc 35035 isbnd3 35077 pmap1N 36918 pol1N 37061 dia1N 38204 dihwN 38440 vdioph 39396 fiphp3d 39436 dmmptdf 41508 stirlinglem14 42392 fvmptrabdm 43512 suppdm 44585 |
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