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| Mirrors > Home > ILE Home > Th. List > inss2 | Unicode 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 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | incom 3399 |
. 2
| |
| 2 | inss1 3427 |
. 2
| |
| 3 | 1, 2 | eqsstrri 3260 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-in 3206 df-ss 3213 |
| This theorem is referenced by: difin0 3568 bnd2 4263 ordin 4482 relin2 4846 relres 5041 ssrnres 5179 cnvcnv 5189 funinsn 5379 funimaexg 5414 fnresin2 5448 ssimaex 5708 ffvresb 5811 fnfvimad 5893 ofrfval 6247 ofvalg 6248 ofrval 6249 off 6251 ofres 6253 ofco 6257 offres 6300 tpostpos 6433 smores3 6462 tfrlem5 6483 tfrexlem 6503 erinxp 6781 pmresg 6848 unfiin 7121 ltrelpi 7547 peano5nnnn 8115 peano5nni 9149 rexanuz 11569 bitsinv1 12544 structcnvcnv 13119 ressbasssd 13173 restsspw 13353 eltg4i 14806 ntrss2 14872 ntrin 14875 isopn3 14876 resttopon 14922 restuni2 14928 cnrest2r 14988 cnptopresti 14989 cnptoprest 14990 lmss 14997 metrest 15257 tgioo 15305 2sqlem8 15879 2sqlem9 15880 peano5set 16594 |
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