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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 4259 ordin 4478 relin2 4842 relres 5037 ssrnres 5175 cnvcnv 5185 funinsn 5374 funimaexg 5409 fnresin2 5443 ssimaex 5701 ffvresb 5804 fnfvimad 5883 ofrfval 6237 ofvalg 6238 ofrval 6239 off 6241 ofres 6243 ofco 6247 offres 6290 tpostpos 6423 smores3 6452 tfrlem5 6473 tfrexlem 6493 erinxp 6771 pmresg 6838 unfiin 7109 ltrelpi 7532 peano5nnnn 8100 peano5nni 9134 rexanuz 11536 bitsinv1 12510 structcnvcnv 13085 ressbasssd 13139 restsspw 13319 eltg4i 14766 ntrss2 14832 ntrin 14835 isopn3 14836 resttopon 14882 restuni2 14888 cnrest2r 14948 cnptopresti 14949 cnptoprest 14950 lmss 14957 metrest 15217 tgioo 15265 2sqlem8 15839 2sqlem9 15840 peano5set 16445 |
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