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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 3268 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
2 | inss1 3296 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
3 | 1, 2 | eqsstrri 3130 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
Colors of variables: wff set class |
Syntax hints: ∩ cin 3070 ⊆ wss 3071 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-v 2688 df-in 3077 df-ss 3084 |
This theorem is referenced by: difin0 3436 bnd2 4097 ordin 4307 relin2 4658 relres 4847 ssrnres 4981 cnvcnv 4991 funinsn 5172 funimaexg 5207 fnresin2 5238 ssimaex 5482 ffvresb 5583 ofrfval 5990 ofvalg 5991 ofrval 5992 off 5994 ofres 5996 ofco 6000 offres 6033 tpostpos 6161 smores3 6190 tfrlem5 6211 tfrexlem 6231 erinxp 6503 pmresg 6570 unfiin 6814 ltrelpi 7139 peano5nnnn 7707 peano5nni 8730 rexanuz 10767 structcnvcnv 11985 restsspw 12140 eltg4i 12234 ntrss2 12300 ntrin 12303 isopn3 12304 resttopon 12350 restuni2 12356 cnrest2r 12416 cnptopresti 12417 cnptoprest 12418 lmss 12425 metrest 12685 tgioo 12725 peano5set 13148 |
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