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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 3421 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
| 2 | inss1 3451 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
| 3 | 1, 2 | eqsstrri 3281 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3219 ⊆ wss 3220 |
| 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 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This theorem depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-in 3226 df-ss 3233 |
| This theorem is referenced by: vvin 3568 difin0 3598 bnd2 4305 ordin 4525 relin2 4891 relres 5086 ssrnres 5225 cnvcnv 5235 funinsn 5425 funimaexg 5460 fnresin2 5494 ssimaex 5758 ffvresb 5862 fnfvimad 5944 ofrfval 6301 ofvalg 6302 ofrval 6303 off 6305 ofres 6307 ofco 6311 offres 6358 tpostpos 6525 smores3 6554 tfrlem5 6575 tfrexlem 6595 erinxp 6873 pmresg 6947 unfiin 7223 ltrelpi 7681 peano5nnnn 8249 peano5nni 9286 rexanuz 11732 bitsinv1 12707 structcnvcnv 13346 ressbasssd 13400 restsspw 13580 eltg4i 15079 ntrss2 15145 ntrin 15148 isopn3 15149 resttopon 15195 restuni2 15201 cnrest2r 15261 cnptopresti 15262 cnptoprest 15263 lmss 15270 metrest 15530 tgioo 15578 2sqlem8 16156 2sqlem9 16157 peano5set 16880 |
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