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Mirrors > Home > ILE Home > Th. List > abssi | GIF version |
Description: Inference of abstraction subclass from implication. (Contributed by NM, 20-Jan-2006.) |
Ref | Expression |
---|---|
abssi.1 | ⊢ (𝜑 → 𝑥 ∈ 𝐴) |
Ref | Expression |
---|---|
abssi | ⊢ {𝑥 ∣ 𝜑} ⊆ 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | abssi.1 | . . 3 ⊢ (𝜑 → 𝑥 ∈ 𝐴) | |
2 | 1 | ss2abi 3012 | . 2 ⊢ {𝑥 ∣ 𝜑} ⊆ {𝑥 ∣ 𝑥 ∈ 𝐴} |
3 | abid2 2158 | . 2 ⊢ {𝑥 ∣ 𝑥 ∈ 𝐴} = 𝐴 | |
4 | 2, 3 | sseqtri 2977 | 1 ⊢ {𝑥 ∣ 𝜑} ⊆ 𝐴 |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 1393 {cab 2026 ⊆ wss 2917 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 |
This theorem depends on definitions: df-bi 110 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-in 2924 df-ss 2931 |
This theorem is referenced by: ssab2 3024 abf 3260 intab 3644 opabss 3821 relopabi 4463 exse2 4699 tfrlem8 5934 frecabex 5984 fiprc 6292 nqprxx 6644 ltnqex 6647 gtnqex 6648 recexprlemell 6720 recexprlemelu 6721 recexprlempr 6730 |
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