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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 4751 | . . 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 3625 Rel wrel 4668 | 
| 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 4151 ax-pow 4207 ax-pr 4242 | 
| 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 3607 df-sn 3628 df-pr 3629 df-op 3631 df-opab 4095 df-xp 4669 df-rel 4670 | 
| This theorem is referenced by: relssres 4984 poirr2 5062 relssdmrn 5190 subrgdvds 13791 txdis1cn 14514 | 
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