| 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 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 |
| This proof depends on syntax axioms: ∩ cin 3219 ⊆ wss 3220 |
| This proof depends on 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 proof 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 used by: vvin 3569 difin0 3601 bnd2 4312 ordin 4532 relin2 4898 relres 5093 ssrnres 5233 cnvcnv 5243 funinsn 5433 funimaexg 5468 fnresin2 5502 ssimaex 5767 ffvresb 5874 fnfvimad 5957 ofrfval 6315 ofvalg 6316 ofrval 6317 off 6319 ofres 6321 ofco 6325 offres 6372 tpostpos 6540 smores3 6569 tfrlem5 6590 tfrexlem 6610 erinxp 6888 pmresg 6962 unfiin 7239 ltrelpi 7697 peano5nnnn 8265 peano5nni 9316 rexanuz 11775 bitsinv1 12753 structcnvcnv 13425 ressbasssd 13481 restsspw 13661 gsummptfidmsplit 14253 gsumresfi 14262 asplss 15124 eltg4i 15298 ntrss2 15364 ntrin 15367 isopn3 15368 resttopon 15414 restuni2 15420 cnrest2r 15480 cnptopresti 15481 cnptoprest 15482 lmss 15489 metrest 15749 tgioo 15797 2sqlem8 16464 2sqlem9 16465 peano5set 17188 |
| Copyright terms: Public domain | W3C validator |