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| Mirrors > Home > ILE Home > Th. List > relssdv | GIF version | ||
| Description: Deduction from subclass principle for relations. (Contributed by NM, 11-Sep-2004.) |
| Ref | Expression |
|---|---|
| relssdv.1 | ⊢ (𝜑 → Rel 𝐴) |
| relssdv.2 | ⊢ (𝜑 → (〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵)) |
| Ref | Expression |
|---|---|
| relssdv | ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relssdv.2 | . . 3 ⊢ (𝜑 → (〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵)) | |
| 2 | 1 | alrimivv 1889 | . 2 ⊢ (𝜑 → ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵)) |
| 3 | relssdv.1 | . . 3 ⊢ (𝜑 → Rel 𝐴) | |
| 4 | ssrel 4752 | . . 3 ⊢ (Rel 𝐴 → (𝐴 ⊆ 𝐵 ↔ ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵))) | |
| 5 | 3, 4 | syl 14 | . 2 ⊢ (𝜑 → (𝐴 ⊆ 𝐵 ↔ ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵))) |
| 6 | 2, 5 | mpbird 167 | 1 ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 ∀wal 1362 ∈ wcel 2167 ⊆ wss 3157 〈cop 3626 Rel wrel 4669 |
| 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 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-v 2765 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-opab 4096 df-xp 4670 df-rel 4671 |
| This theorem is referenced by: relssres 4985 poirr2 5063 relssdmrn 5191 subrgdvds 13867 txdis1cn 14598 |
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