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| Mirrors > Home > ILE Home > Th. List > rexbidva | GIF version | ||
| Description: Formula-building rule for restricted existential quantifier (deduction form). (Contributed by NM, 9-Mar-1997.) |
| Ref | Expression |
|---|---|
| ralbidva.1 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝜓 ↔ 𝜒)) |
| Ref | Expression |
|---|---|
| rexbidva | ⊢ (𝜑 → (∃𝑥 ∈ 𝐴 𝜓 ↔ ∃𝑥 ∈ 𝐴 𝜒)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfv 1577 | . 2 ⊢ Ⅎ𝑥𝜑 | |
| 2 | ralbidva.1 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝜓 ↔ 𝜒)) | |
| 3 | 1, 2 | rexbida 2528 | 1 ⊢ (𝜑 → (∃𝑥 ∈ 𝐴 𝜓 ↔ ∃𝑥 ∈ 𝐴 𝜒)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2202 ∃wrex 2512 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1496 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-4 1559 ax-17 1575 ax-ial 1583 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-rex 2517 |
| This theorem is referenced by: 2rexbiia 2549 2rexbidva 2556 rexeqbidva 2750 dfimafn 5703 funimass4 5705 fconstfvm 5880 fliftel 5944 fliftf 5950 f1oiso 5977 releldm2 6357 frecabcl 6608 qsinxp 6823 qliftel 6827 supisolem 7250 enumctlemm 7356 ismkvnex 7397 genpassl 7787 genpassu 7788 addcomprg 7841 mulcomprg 7843 1idprl 7853 1idpru 7854 archrecnq 7926 archrecpr 7927 caucvgprprlemexbt 7969 caucvgprprlemexb 7970 archsr 8045 map2psrprg 8068 suplocsrlempr 8070 axsuploc 8294 cnegexlem3 8398 cnegex2 8400 recexre 8800 rerecclap 8952 creur 9181 creui 9182 nndiv 9226 arch 9441 nnrecl 9442 expnlbnd 10972 fimaxq 11137 wrdval 11165 clim2 11906 clim2c 11907 clim0c 11909 climabs0 11930 climrecvg1n 11971 sumeq2 11982 mertensabs 12161 prodeq2 12181 zproddc 12203 nndivides 12421 alzdvds 12478 oddm1even 12499 oddnn02np1 12504 oddge22np1 12505 evennn02n 12506 evennn2n 12507 divalgb 12549 modremain 12553 modprmn0modprm0 12892 pythagtriplem2 12902 pythagtrip 12919 pceu 12931 4sqlem12 13038 gsumpropd2 13539 mndpfo 13584 mndpropd 13586 grppropd 13663 conjnmzb 13930 dvdsr02 14183 crngunit 14189 dvdsrpropdg 14225 cnfldui 14668 znunit 14738 iscnp3 14997 lmbrf 15009 cncnp 15024 lmss 15040 metrest 15300 metcnp 15306 metcnp2 15307 txmetcnp 15312 cdivcncfap 15398 ivthdec 15438 lgsquadlem2 15880 2lgslem1a 15890 pw1nct 16708 |
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