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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 3397 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
| 2 | inss1 3425 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
| 3 | 1, 2 | eqsstrri 3258 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3197 ⊆ wss 3198 |
| 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 2802 df-in 3204 df-ss 3211 |
| This theorem is referenced by: difin0 3566 bnd2 4261 ordin 4480 relin2 4844 relres 5039 ssrnres 5177 cnvcnv 5187 funinsn 5376 funimaexg 5411 fnresin2 5445 ssimaex 5703 ffvresb 5806 fnfvimad 5885 ofrfval 6239 ofvalg 6240 ofrval 6241 off 6243 ofres 6245 ofco 6249 offres 6292 tpostpos 6425 smores3 6454 tfrlem5 6475 tfrexlem 6495 erinxp 6773 pmresg 6840 unfiin 7111 ltrelpi 7534 peano5nnnn 8102 peano5nni 9136 rexanuz 11539 bitsinv1 12513 structcnvcnv 13088 ressbasssd 13142 restsspw 13322 eltg4i 14769 ntrss2 14835 ntrin 14838 isopn3 14839 resttopon 14885 restuni2 14891 cnrest2r 14951 cnptopresti 14952 cnptoprest 14953 lmss 14960 metrest 15220 tgioo 15268 2sqlem8 15842 2sqlem9 15843 peano5set 16471 |
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