| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5871 fliftel 5933 fliftf 5939 f1oiso 5966 releldm2 6347 frecabcl 6564 qsinxp 6779 qliftel 6783 supisolem 7206 enumctlemm 7312 ismkvnex 7353 genpassl 7743 genpassu 7744 addcomprg 7797 mulcomprg 7799 1idprl 7809 1idpru 7810 archrecnq 7882 archrecpr 7883 caucvgprprlemexbt 7925 caucvgprprlemexb 7926 archsr 8001 map2psrprg 8024 suplocsrlempr 8026 axsuploc 8251 cnegexlem3 8355 cnegex2 8357 recexre 8757 rerecclap 8909 creur 9138 creui 9139 nndiv 9183 arch 9398 nnrecl 9399 expnlbnd 10925 fimaxq 11090 wrdval 11115 clim2 11843 clim2c 11844 clim0c 11846 climabs0 11867 climrecvg1n 11908 sumeq2 11919 mertensabs 12097 prodeq2 12117 zproddc 12139 nndivides 12357 alzdvds 12414 oddm1even 12435 oddnn02np1 12440 oddge22np1 12441 evennn02n 12442 evennn2n 12443 divalgb 12485 modremain 12489 modprmn0modprm0 12828 pythagtriplem2 12838 pythagtrip 12855 pceu 12867 4sqlem12 12974 gsumpropd2 13475 mndpfo 13520 mndpropd 13522 grppropd 13599 conjnmzb 13866 dvdsr02 14118 crngunit 14124 dvdsrpropdg 14160 cnfldui 14602 znunit 14672 iscnp3 14926 lmbrf 14938 cncnp 14953 lmss 14969 metrest 15229 metcnp 15235 metcnp2 15236 txmetcnp 15241 cdivcncfap 15327 ivthdec 15367 lgsquadlem2 15806 2lgslem1a 15816 pw1nct 16604 |
| Copyright terms: Public domain | W3C validator |