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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 4330 frind 4497 ordtriexmidlem2 4667 ordtriexmid 4668 ontriexmidim 4669 ordtri2orexmid 4670 onsucelsucexmid 4677 0elsucexmid 4712 ordpwsucexmid 4717 ordtri2or2exmid 4718 ontri2orexmidim 4719 canth 6036 acexmidlema 6076 acexmidlemb 6077 isnumi 7527 genpelvl 7879 genpelvu 7880 cauappcvgprlemladdru 8023 cauappcvgprlem1 8026 caucvgprlem1 8046 sup3exmid 9289 supinfneg 10004 infsupneg 10005 supminfex 10006 ublbneg 10022 negm 10024 infssuzex 10676 hashinfuni 11230 gcddvds 12756 dvdslegcd 12757 bezoutlemsup 12802 uzwodc 12830 lcmval 12857 dvdslcm 12863 isprm2lem 12910 eupth2lem3lem3fi 16809 eupth2lem3lem6fi 16810 eupth2lem3lem4fi 16812 |
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