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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 3401 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
| 2 | inss1 3429 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
| 3 | 1, 2 | eqsstrri 3261 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3200 ⊆ wss 3201 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-v 2805 df-in 3207 df-ss 3214 |
| This theorem is referenced by: difin0 3570 bnd2 4269 ordin 4488 relin2 4852 relres 5047 ssrnres 5186 cnvcnv 5196 funinsn 5386 funimaexg 5421 fnresin2 5455 ssimaex 5716 ffvresb 5818 fnfvimad 5900 ofrfval 6253 ofvalg 6254 ofrval 6255 off 6257 ofres 6259 ofco 6263 offres 6306 tpostpos 6473 smores3 6502 tfrlem5 6523 tfrexlem 6543 erinxp 6821 pmresg 6888 unfiin 7161 ltrelpi 7587 peano5nnnn 8155 peano5nni 9188 rexanuz 11611 bitsinv1 12586 structcnvcnv 13161 ressbasssd 13215 restsspw 13395 eltg4i 14849 ntrss2 14915 ntrin 14918 isopn3 14919 resttopon 14965 restuni2 14971 cnrest2r 15031 cnptopresti 15032 cnptoprest 15033 lmss 15040 metrest 15300 tgioo 15348 2sqlem8 15925 2sqlem9 15926 peano5set 16639 |
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