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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 2537 | 1 ⊢ (𝜑 → (∃𝑥 ∈ 𝐴 𝜓 ↔ ∃𝑥 ∈ 𝐴 𝜒)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2203 ∃wrex 2521 |
| 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 2526 |
| This theorem is referenced by: 2rexbiia 2558 2rexbidva 2565 rexeqbidva 2760 dfimafn 5725 funimass4 5727 fconstfvm 5902 fliftel 5966 fliftf 5972 f1oiso 5999 releldm2 6379 frecabcl 6630 qsinxp 6845 qliftel 6849 supisolem 7299 enumctlemm 7405 ismkvnex 7446 genpassl 7839 genpassu 7840 addcomprg 7893 mulcomprg 7895 1idprl 7905 1idpru 7906 archrecnq 7978 archrecpr 7979 caucvgprprlemexbt 8021 caucvgprprlemexb 8022 archsr 8097 map2psrprg 8120 suplocsrlempr 8122 axsuploc 8346 cnegexlem3 8450 cnegex2 8452 recexre 8852 rerecclap 9004 creur 9233 creui 9234 nndiv 9278 arch 9493 nnrecl 9494 expnlbnd 11026 fimaxq 11194 wrdval 11227 clim2 11968 clim2c 11969 clim0c 11971 climabs0 11992 climrecvg1n 12033 sumeq2 12044 mertensabs 12223 prodeq2 12243 zproddc 12265 nndivides 12483 alzdvds 12540 oddm1even 12561 oddnn02np1 12566 oddge22np1 12567 evennn02n 12568 evennn2n 12569 divalgb 12611 modremain 12615 modprmn0modprm0 12954 pythagtriplem2 12964 pythagtrip 12981 pceu 12993 4sqlem12 13100 gsumpropd2 13606 mndpfo 13651 mndpropd 13653 grppropd 13730 conjnmzb 13997 dvdsr02 14250 crngunit 14256 dvdsrpropdg 14292 cnfldui 14737 znunit 14807 iscnp3 15068 lmbrf 15080 cncnp 15095 lmss 15111 metrest 15371 metcnp 15377 metcnp2 15378 txmetcnp 15383 cdivcncfap 15469 ivthdec 15509 lgsquadlem2 15951 2lgslem1a 15961 pw1nct 16777 |
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