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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 2893 | . 2 ⊢ (𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜑} ↔ (𝐴 ∈ 𝐵 ∧ 𝜓)) |
3 | 2 | baib 919 | 1 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜑} ↔ 𝜓)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 105 = wceq 1353 ∈ wcel 2148 {crab 2459 |
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-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-rab 2464 df-v 2739 |
This theorem is referenced by: unimax 3842 undifexmid 4191 frind 4350 ordtriexmidlem2 4517 ordtriexmid 4518 ontriexmidim 4519 ordtri2orexmid 4520 onsucelsucexmid 4527 0elsucexmid 4562 ordpwsucexmid 4567 ordtri2or2exmid 4568 ontri2orexmidim 4569 canth 5824 acexmidlema 5861 acexmidlemb 5862 isnumi 7176 genpelvl 7506 genpelvu 7507 cauappcvgprlemladdru 7650 cauappcvgprlem1 7653 caucvgprlem1 7673 sup3exmid 8908 supinfneg 9589 infsupneg 9590 supminfex 9591 ublbneg 9607 negm 9609 hashinfuni 10748 infssuzex 11940 gcddvds 11954 dvdslegcd 11955 bezoutlemsup 12000 uzwodc 12028 lcmval 12053 dvdslcm 12059 isprm2lem 12106 |
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