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Related theorems GIF version |
| Description: Inference from subclass principle for relations. |
| 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 3304 | . . 3 ⊢ (Rel A → (A ⊆ B ↔ ∀x∀y(〈x, y〉 ∈ A → 〈x, y〉 ∈ B))) | |
| 3 | 1, 2 | ax-mp 7 | . 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 1004 | . 2 ⊢ ∀y(〈x, y〉 ∈ A → 〈x, y〉 ∈ B) |
| 6 | 3, 5 | mpgbir 1029 | 1 ⊢ A ⊆ B |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ↔ wb 153 ∀wal 995 ∈ wcel 999 ⊆ wss 2098 〈cop 2463 Rel wrel 3232 |
| This theorem is referenced by: xpsspw 3314 resiexg 3453 oprssdm 4100 ecopoprdm 4370 enssdom 4444 idssen 4467 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1003 ax-gen 1004 ax-8 1005 ax-10 1007 ax-11 1008 ax-12 1009 ax-13 1010 ax-14 1011 ax-17 1012 ax-4 1014 ax-5o 1016 ax-6o 1019 ax-9o 1164 ax-10o 1182 ax-16 1252 ax-11o 1260 ax-ext 1504 ax-sep 2758 ax-pow 2798 ax-pr 2835 |
| This theorem depends on definitions: df-bi 154 df-or 231 df-an 232 df-ex 1022 df-sb 1214 df-eu 1424 df-mo 1425 df-clab 1510 df-cleq 1515 df-clel 1518 df-ne 1634 df-v 1859 df-dif 2100 df-un 2101 df-in 2102 df-ss 2104 df-nul 2332 df-pw 2454 df-sn 2464 df-pr 2465 df-op 2468 df-opab 2722 df-xp 3241 df-rel 3242 |