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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 2947 | . . 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 3149 | . . 3 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} | |
6 | 5 | eqeq2i 2836 | . 2 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ 𝐴 = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)}) |
7 | df-ral 3145 | . 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 2801 ∀wral 3140 {crab 3144 |
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 2795 |
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 2802 df-cleq 2816 df-clel 2895 df-ral 3145 df-rab 3149 |
This theorem is referenced by: rabxm 4342 iinrab2 4994 riinrab 5008 class2seteq 5257 dmmptg 6098 wfisg 6185 dmmptd 6495 fneqeql 6818 fmpt 6876 zfrep6 7658 axdc2lem 9872 ioomax 12814 iccmax 12815 hashbc 13814 lcmf0 15980 dfphi2 16113 phiprmpw 16115 phisum 16129 isnsg4 18321 symggen2 18601 psgnfvalfi 18643 lssuni 19713 psr1baslem 20355 psgnghm2 20727 ocv0 20823 dsmmfi 20884 frlmfibas 20908 frlmlbs 20943 ordtrest2lem 21813 comppfsc 22142 xkouni 22209 xkoccn 22229 tsmsfbas 22738 clsocv 23855 ehlbase 24020 ovolicc2lem4 24123 itg2monolem1 24353 musum 25770 lgsquadlem2 25959 umgr2v2evd2 27311 frgrregorufr0 28105 ubthlem1 28649 xrsclat 30669 psgndmfi 30742 ordtrest2NEWlem 31167 hasheuni 31346 measvuni 31475 imambfm 31522 subfacp1lem6 32434 connpconn 32484 cvmliftmolem2 32531 cvmlift2lem12 32563 tfisg 33057 frpoinsg 33083 frinsg 33089 poimirlem28 34922 fdc 35022 isbnd3 35064 pmap1N 36905 pol1N 37048 dia1N 38191 dihwN 38427 vdioph 39383 fiphp3d 39423 dmmptdf 41495 stirlinglem14 42379 fvmptrabdm 43499 suppdm 44572 |
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