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| Mirrors > Home > ILE Home > Th. List > relssi | GIF version | ||
| Description: Inference from subclass principle for relations. (Contributed by NM, 31-Mar-1998.) |
| Ref | Expression |
|---|---|
| relssi.1 | ⊢ Rel 𝐴 |
| relssi.2 | ⊢ (〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| relssi | ⊢ 𝐴 ⊆ 𝐵 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relssi.1 | . . 3 ⊢ Rel 𝐴 | |
| 2 | ssrel 4764 | . . 3 ⊢ (Rel 𝐴 → (𝐴 ⊆ 𝐵 ↔ ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵))) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ (𝐴 ⊆ 𝐵 ↔ ∀𝑥∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵)) |
| 4 | relssi.2 | . . 3 ⊢ (〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵) | |
| 5 | 4 | ax-gen 1472 | . 2 ⊢ ∀𝑦(〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵) |
| 6 | 3, 5 | mpgbir 1476 | 1 ⊢ 𝐴 ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 ∀wal 1371 ∈ wcel 2176 ⊆ wss 3166 〈cop 3636 Rel wrel 4681 |
| 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 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-14 2179 ax-ext 2187 ax-sep 4163 ax-pow 4219 ax-pr 4254 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-v 2774 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-op 3642 df-opab 4107 df-xp 4682 df-rel 4683 |
| This theorem is referenced by: resiexg 5005 dftpos4 6351 enssdom 6855 idssen 6870 txuni2 14761 |
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