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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 1574 | . 2 ⊢ Ⅎ𝑥𝜑 | |
| 2 | ralbidva.1 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝜓 ↔ 𝜒)) | |
| 3 | 1, 2 | rexbida 2525 | 1 ⊢ (𝜑 → (∃𝑥 ∈ 𝐴 𝜓 ↔ ∃𝑥 ∈ 𝐴 𝜒)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2200 ∃wrex 2509 |
| 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 1493 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-4 1556 ax-17 1572 ax-ial 1580 |
| This theorem depends on definitions: df-bi 117 df-nf 1507 df-rex 2514 |
| This theorem is referenced by: 2rexbiia 2546 2rexbidva 2553 rexeqbidva 2747 dfimafn 5690 funimass4 5692 fconstfvm 5867 fliftel 5929 fliftf 5935 f1oiso 5962 releldm2 6343 frecabcl 6560 qsinxp 6775 qliftel 6779 supisolem 7198 enumctlemm 7304 ismkvnex 7345 genpassl 7734 genpassu 7735 addcomprg 7788 mulcomprg 7790 1idprl 7800 1idpru 7801 archrecnq 7873 archrecpr 7874 caucvgprprlemexbt 7916 caucvgprprlemexb 7917 archsr 7992 map2psrprg 8015 suplocsrlempr 8017 axsuploc 8242 cnegexlem3 8346 cnegex2 8348 recexre 8748 rerecclap 8900 creur 9129 creui 9130 nndiv 9174 arch 9389 nnrecl 9390 expnlbnd 10916 fimaxq 11081 wrdval 11106 clim2 11834 clim2c 11835 clim0c 11837 climabs0 11858 climrecvg1n 11899 sumeq2 11910 mertensabs 12088 prodeq2 12108 zproddc 12130 nndivides 12348 alzdvds 12405 oddm1even 12426 oddnn02np1 12431 oddge22np1 12432 evennn02n 12433 evennn2n 12434 divalgb 12476 modremain 12480 modprmn0modprm0 12819 pythagtriplem2 12829 pythagtrip 12846 pceu 12858 4sqlem12 12965 gsumpropd2 13466 mndpfo 13511 mndpropd 13513 grppropd 13590 conjnmzb 13857 dvdsr02 14109 crngunit 14115 dvdsrpropdg 14151 cnfldui 14593 znunit 14663 iscnp3 14917 lmbrf 14929 cncnp 14944 lmss 14960 metrest 15220 metcnp 15226 metcnp2 15227 txmetcnp 15232 cdivcncfap 15318 ivthdec 15358 lgsquadlem2 15797 2lgslem1a 15807 pw1nct 16540 |
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