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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 1576 | . 2 ⊢ Ⅎ𝑥𝜑 | |
| 2 | ralbidva.1 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝜓 ↔ 𝜒)) | |
| 3 | 1, 2 | rexbida 2527 | 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 2511 |
| 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 1495 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-4 1558 ax-17 1574 ax-ial 1582 |
| This theorem depends on definitions: df-bi 117 df-nf 1509 df-rex 2516 |
| This theorem is referenced by: 2rexbiia 2548 2rexbidva 2555 rexeqbidva 2749 dfimafn 5695 funimass4 5697 fconstfvm 5873 fliftel 5937 fliftf 5943 f1oiso 5970 releldm2 6351 frecabcl 6568 qsinxp 6783 qliftel 6787 supisolem 7210 enumctlemm 7316 ismkvnex 7357 genpassl 7747 genpassu 7748 addcomprg 7801 mulcomprg 7803 1idprl 7813 1idpru 7814 archrecnq 7886 archrecpr 7887 caucvgprprlemexbt 7929 caucvgprprlemexb 7930 archsr 8005 map2psrprg 8028 suplocsrlempr 8030 axsuploc 8255 cnegexlem3 8359 cnegex2 8361 recexre 8761 rerecclap 8913 creur 9142 creui 9143 nndiv 9187 arch 9402 nnrecl 9403 expnlbnd 10930 fimaxq 11095 wrdval 11123 clim2 11864 clim2c 11865 clim0c 11867 climabs0 11888 climrecvg1n 11929 sumeq2 11940 mertensabs 12119 prodeq2 12139 zproddc 12161 nndivides 12379 alzdvds 12436 oddm1even 12457 oddnn02np1 12462 oddge22np1 12463 evennn02n 12464 evennn2n 12465 divalgb 12507 modremain 12511 modprmn0modprm0 12850 pythagtriplem2 12860 pythagtrip 12877 pceu 12889 4sqlem12 12996 gsumpropd2 13497 mndpfo 13542 mndpropd 13544 grppropd 13621 conjnmzb 13888 dvdsr02 14141 crngunit 14147 dvdsrpropdg 14183 cnfldui 14625 znunit 14695 iscnp3 14954 lmbrf 14966 cncnp 14981 lmss 14997 metrest 15257 metcnp 15263 metcnp2 15264 txmetcnp 15269 cdivcncfap 15355 ivthdec 15395 lgsquadlem2 15834 2lgslem1a 15844 pw1nct 16663 |
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