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| Mirrors > Home > ILE Home > Th. List > elrab3 | GIF version | ||
| Description: Membership in a restricted class abstraction, using implicit substitution. (Contributed by NM, 5-Oct-2006.) |
| Ref | Expression |
|---|---|
| elrab.1 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| elrab3 | ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜑} ↔ 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elrab.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 2 | 1 | elrab 2982 | . 2 ⊢ (𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜑} ↔ (𝐴 ∈ 𝐵 ∧ 𝜓)) |
| 3 | 2 | baib 931 | 1 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜑} ↔ 𝜓)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 ∈ wcel 2209 {crab 2532 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rab 2537 df-v 2823 |
| This theorem is used by: unimax 3969 undifexmid 4332 frind 4499 ordtriexmidlem2 4669 ordtriexmid 4670 ontriexmidim 4671 ordtri2orexmid 4672 onsucelsucexmid 4679 0elsucexmid 4714 ordpwsucexmid 4719 ordtri2or2exmid 4720 ontri2orexmidim 4721 canth 6039 acexmidlema 6079 acexmidlemb 6080 isnumi 7533 genpelvl 7885 genpelvu 7886 cauappcvgprlemladdru 8029 cauappcvgprlem1 8032 caucvgprlem1 8052 sup3exmid 9295 supinfneg 10011 infsupneg 10012 supminfex 10013 ublbneg 10029 negm 10031 infssuzex 10683 hashinfuni 11238 gcddvds 12765 dvdslegcd 12766 bezoutlemsup 12811 uzwodc 12839 lcmval 12866 dvdslcm 12872 isprm2lem 12919 eupth2lem3lem3fi 16916 eupth2lem3lem6fi 16917 eupth2lem3lem4fi 16919 rirrdisj 17291 |
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