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| Mirrors > Home > ILE Home > Th. List > inss2 | GIF version | ||
| Description: The intersection of two classes is a subset of one of them. Part of Exercise 12 of [TakeutiZaring] p. 18. (Contributed by NM, 27-Apr-1994.) |
| Ref | Expression |
|---|---|
| inss2 | ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | incom 3396 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
| 2 | inss1 3424 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
| 3 | 1, 2 | eqsstrri 3257 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3196 ⊆ wss 3197 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-v 2801 df-in 3203 df-ss 3210 |
| This theorem is referenced by: difin0 3565 bnd2 4257 ordin 4476 relin2 4838 relres 5033 ssrnres 5171 cnvcnv 5181 funinsn 5370 funimaexg 5405 fnresin2 5439 ssimaex 5697 ffvresb 5800 fnfvimad 5879 ofrfval 6233 ofvalg 6234 ofrval 6235 off 6237 ofres 6239 ofco 6243 offres 6286 tpostpos 6416 smores3 6445 tfrlem5 6466 tfrexlem 6486 erinxp 6764 pmresg 6831 unfiin 7099 ltrelpi 7522 peano5nnnn 8090 peano5nni 9124 rexanuz 11514 bitsinv1 12488 structcnvcnv 13063 ressbasssd 13117 restsspw 13297 eltg4i 14744 ntrss2 14810 ntrin 14813 isopn3 14814 resttopon 14860 restuni2 14866 cnrest2r 14926 cnptopresti 14927 cnptoprest 14928 lmss 14935 metrest 15195 tgioo 15243 2sqlem8 15817 2sqlem9 15818 peano5set 16358 |
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