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Mirrors > Home > ILE Home > Th. List > Mathboxes > elabf2 | GIF version |
Description: One implication of elabf 2827. (Contributed by BJ, 21-Nov-2019.) |
Ref | Expression |
---|---|
elabf2.nf | ⊢ Ⅎ𝑥𝜓 |
elabf2.s | ⊢ 𝐴 ∈ V |
elabf2.1 | ⊢ (𝑥 = 𝐴 → (𝜓 → 𝜑)) |
Ref | Expression |
---|---|
elabf2 | ⊢ (𝜓 → 𝐴 ∈ {𝑥 ∣ 𝜑}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elabf2.s | . 2 ⊢ 𝐴 ∈ V | |
2 | nfcv 2281 | . . 3 ⊢ Ⅎ𝑥𝐴 | |
3 | elabf2.nf | . . 3 ⊢ Ⅎ𝑥𝜓 | |
4 | elabf2.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜓 → 𝜑)) | |
5 | 2, 3, 4 | elabgf2 12987 | . 2 ⊢ (𝐴 ∈ V → (𝜓 → 𝐴 ∈ {𝑥 ∣ 𝜑})) |
6 | 1, 5 | ax-mp 5 | 1 ⊢ (𝜓 → 𝐴 ∈ {𝑥 ∣ 𝜑}) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1331 Ⅎwnf 1436 ∈ wcel 1480 {cab 2125 Vcvv 2686 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-v 2688 |
This theorem is referenced by: elab2a 12991 bj-bdfindis 13145 |
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