| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 3415 | . 2 ⊢ (𝐵 ∩ 𝐴) = (𝐴 ∩ 𝐵) | |
| 2 | inss1 3445 | . 2 ⊢ (𝐵 ∩ 𝐴) ⊆ 𝐵 | |
| 3 | 1, 2 | eqsstrri 3275 | 1 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵 |
| Colors of variables: wff set class |
| Syntax hints: ∩ cin 3213 ⊆ wss 3214 |
| 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 2216 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 df-in 3220 df-ss 3227 |
| This theorem is referenced by: difin0 3587 bnd2 4291 ordin 4511 relin2 4876 relres 5071 ssrnres 5210 cnvcnv 5220 funinsn 5410 funimaexg 5445 fnresin2 5479 ssimaex 5743 ffvresb 5845 fnfvimad 5927 ofrfval 6284 ofvalg 6285 ofrval 6286 off 6288 ofres 6290 ofco 6294 offres 6341 tpostpos 6508 smores3 6537 tfrlem5 6558 tfrexlem 6578 erinxp 6856 pmresg 6923 unfiin 7199 ltrelpi 7655 peano5nnnn 8223 peano5nni 9257 rexanuz 11698 bitsinv1 12673 structcnvcnv 13312 ressbasssd 13366 restsspw 13546 eltg4i 15046 ntrss2 15112 ntrin 15115 isopn3 15116 resttopon 15162 restuni2 15168 cnrest2r 15228 cnptopresti 15229 cnptoprest 15230 lmss 15237 metrest 15497 tgioo 15545 2sqlem8 16122 2sqlem9 16123 peano5set 16836 |
| Copyright terms: Public domain | W3C validator |