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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 3411 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
| 2 | inss1 3441 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
| 3 | 1, 2 | eqsstrri 3271 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3210 ⊆ wss 3211 |
| 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 2214 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2815 df-in 3217 df-ss 3224 |
| This theorem is referenced by: difin0 3583 bnd2 4286 ordin 4506 relin2 4871 relres 5066 ssrnres 5205 cnvcnv 5215 funinsn 5405 funimaexg 5440 fnresin2 5474 ssimaex 5738 ffvresb 5840 fnfvimad 5922 ofrfval 6275 ofvalg 6276 ofrval 6277 off 6279 ofres 6281 ofco 6285 offres 6328 tpostpos 6495 smores3 6524 tfrlem5 6545 tfrexlem 6565 erinxp 6843 pmresg 6910 unfiin 7186 ltrelpi 7639 peano5nnnn 8207 peano5nni 9240 rexanuz 11673 bitsinv1 12648 structcnvcnv 13228 ressbasssd 13282 restsspw 13462 eltg4i 14920 ntrss2 14986 ntrin 14989 isopn3 14990 resttopon 15036 restuni2 15042 cnrest2r 15102 cnptopresti 15103 cnptoprest 15104 lmss 15111 metrest 15371 tgioo 15419 2sqlem8 15996 2sqlem9 15997 peano5set 16710 |
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