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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 5684 funimass4 5686 fconstfvm 5861 fliftel 5923 fliftf 5929 f1oiso 5956 releldm2 6337 frecabcl 6551 qsinxp 6766 qliftel 6770 supisolem 7186 enumctlemm 7292 ismkvnex 7333 genpassl 7722 genpassu 7723 addcomprg 7776 mulcomprg 7778 1idprl 7788 1idpru 7789 archrecnq 7861 archrecpr 7862 caucvgprprlemexbt 7904 caucvgprprlemexb 7905 archsr 7980 map2psrprg 8003 suplocsrlempr 8005 axsuploc 8230 cnegexlem3 8334 cnegex2 8336 recexre 8736 rerecclap 8888 creur 9117 creui 9118 nndiv 9162 arch 9377 nnrecl 9378 expnlbnd 10898 fimaxq 11062 wrdval 11087 clim2 11809 clim2c 11810 clim0c 11812 climabs0 11833 climrecvg1n 11874 sumeq2 11885 mertensabs 12063 prodeq2 12083 zproddc 12105 nndivides 12323 alzdvds 12380 oddm1even 12401 oddnn02np1 12406 oddge22np1 12407 evennn02n 12408 evennn2n 12409 divalgb 12451 modremain 12455 modprmn0modprm0 12794 pythagtriplem2 12804 pythagtrip 12821 pceu 12833 4sqlem12 12940 gsumpropd2 13441 mndpfo 13486 mndpropd 13488 grppropd 13565 conjnmzb 13832 dvdsr02 14084 crngunit 14090 dvdsrpropdg 14126 cnfldui 14568 znunit 14638 iscnp3 14892 lmbrf 14904 cncnp 14919 lmss 14935 metrest 15195 metcnp 15201 metcnp2 15202 txmetcnp 15207 cdivcncfap 15293 ivthdec 15333 lgsquadlem2 15772 2lgslem1a 15782 pw1nct 16428 |
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