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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 3399 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
| 2 | inss1 3427 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
| 3 | 1, 2 | eqsstrri 3260 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3199 ⊆ wss 3200 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-in 3206 df-ss 3213 |
| This theorem is referenced by: difin0 3568 bnd2 4263 ordin 4482 relin2 4846 relres 5041 ssrnres 5179 cnvcnv 5189 funinsn 5379 funimaexg 5414 fnresin2 5448 ssimaex 5707 ffvresb 5810 fnfvimad 5889 ofrfval 6243 ofvalg 6244 ofrval 6245 off 6247 ofres 6249 ofco 6253 offres 6296 tpostpos 6429 smores3 6458 tfrlem5 6479 tfrexlem 6499 erinxp 6777 pmresg 6844 unfiin 7117 ltrelpi 7543 peano5nnnn 8111 peano5nni 9145 rexanuz 11548 bitsinv1 12522 structcnvcnv 13097 ressbasssd 13151 restsspw 13331 eltg4i 14778 ntrss2 14844 ntrin 14847 isopn3 14848 resttopon 14894 restuni2 14900 cnrest2r 14960 cnptopresti 14961 cnptoprest 14962 lmss 14969 metrest 15229 tgioo 15277 2sqlem8 15851 2sqlem9 15852 peano5set 16535 |
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