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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 2719 | . . 3 ⊢ (𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
2 | pm4.71 660 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 → 𝜑) ↔ (𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
3 | 2 | albii 1737 | . . 3 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝑥 ∈ 𝐴 ∧ 𝜑))) |
4 | 1, 3 | bitr4i 266 | . 2 ⊢ (𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) |
5 | df-rab 2905 | . . 3 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} | |
6 | 5 | eqeq2i 2622 | . 2 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ 𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)}) |
7 | df-ral 2901 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
8 | 4, 6, 7 | 3bitr4i 291 | 1 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ ∀𝑥 ∈ 𝐴 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 ∀wal 1473 = wceq 1475 ∈ wcel 1977 {cab 2596 ∀wral 2896 {crab 2900 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-ral 2901 df-rab 2905 |
This theorem is referenced by: rabxm 3915 iinrab2 4519 riinrab 4532 class2seteq 4759 dmmptg 5549 wfisg 5632 dmmptd 5937 fneqeql 6233 fmpt 6289 zfrep6 7027 axdc2lem 9153 ioomax 12119 iccmax 12120 hashbc 13094 lcmf0 15185 dfphi2 15317 phiprmpw 15319 phisum 15333 isnsg4 17460 symggen2 17714 psgnfvalfi 17756 lssuni 18761 psr1baslem 19376 psgnghm2 19746 ocv0 19840 dsmmfi 19901 frlmfibas 19924 frlmlbs 19955 ordtrest2lem 20817 comppfsc 21145 xkouni 21212 xkoccn 21232 tsmsfbas 21741 clsocv 22857 ehlbase 23002 ovolicc2lem4 23095 itg2monolem1 23323 musum 24717 lgsquadlem2 24906 vdgr1d 26430 vdgr1b 26431 frgraregorufr0 26579 ubthlem1 27110 xrsclat 29011 psgndmfi 29177 ordtrest2NEWlem 29296 hasheuni 29474 measvuni 29604 imambfm 29651 subfacp1lem6 30421 conpcon 30471 cvmliftmolem2 30518 cvmlift2lem12 30550 tfisg 30960 frinsg 30986 poimirlem28 32607 fdc 32711 isbnd3 32753 pmap1N 34071 pol1N 34214 dia1N 35360 dihwN 35596 vdioph 36361 fiphp3d 36401 dmmptdf 38412 stirlinglem14 38980 umgr2v2evd2 40743 frgrregorufr0 41489 suppdm 42094 |
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