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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 5694 funimass4 5696 fconstfvm 5872 fliftel 5934 fliftf 5940 f1oiso 5967 releldm2 6348 frecabcl 6565 qsinxp 6780 qliftel 6784 supisolem 7207 enumctlemm 7313 ismkvnex 7354 genpassl 7744 genpassu 7745 addcomprg 7798 mulcomprg 7800 1idprl 7810 1idpru 7811 archrecnq 7883 archrecpr 7884 caucvgprprlemexbt 7926 caucvgprprlemexb 7927 archsr 8002 map2psrprg 8025 suplocsrlempr 8027 axsuploc 8252 cnegexlem3 8356 cnegex2 8358 recexre 8758 rerecclap 8910 creur 9139 creui 9140 nndiv 9184 arch 9399 nnrecl 9400 expnlbnd 10927 fimaxq 11092 wrdval 11120 clim2 11848 clim2c 11849 clim0c 11851 climabs0 11872 climrecvg1n 11913 sumeq2 11924 mertensabs 12103 prodeq2 12123 zproddc 12145 nndivides 12363 alzdvds 12420 oddm1even 12441 oddnn02np1 12446 oddge22np1 12447 evennn02n 12448 evennn2n 12449 divalgb 12491 modremain 12495 modprmn0modprm0 12834 pythagtriplem2 12844 pythagtrip 12861 pceu 12873 4sqlem12 12980 gsumpropd2 13481 mndpfo 13526 mndpropd 13528 grppropd 13605 conjnmzb 13872 dvdsr02 14125 crngunit 14131 dvdsrpropdg 14167 cnfldui 14609 znunit 14679 iscnp3 14933 lmbrf 14945 cncnp 14960 lmss 14976 metrest 15236 metcnp 15242 metcnp2 15243 txmetcnp 15248 cdivcncfap 15334 ivthdec 15374 lgsquadlem2 15813 2lgslem1a 15823 pw1nct 16630 |
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