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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 3413 |
. 2
| |
| 2 | inss1 3443 |
. 2
| |
| 3 | 1, 2 | eqsstrri 3273 |
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 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 3219 df-ss 3226 |
| This theorem is referenced by: difin0 3585 bnd2 4288 ordin 4508 relin2 4873 relres 5068 ssrnres 5207 cnvcnv 5217 funinsn 5407 funimaexg 5442 fnresin2 5476 ssimaex 5740 ffvresb 5842 fnfvimad 5924 ofrfval 6277 ofvalg 6278 ofrval 6279 off 6281 ofres 6283 ofco 6287 offres 6330 tpostpos 6497 smores3 6526 tfrlem5 6547 tfrexlem 6567 erinxp 6845 pmresg 6912 unfiin 7188 ltrelpi 7641 peano5nnnn 8209 peano5nni 9242 rexanuz 11677 bitsinv1 12652 structcnvcnv 13245 ressbasssd 13299 restsspw 13479 eltg4i 14937 ntrss2 15003 ntrin 15006 isopn3 15007 resttopon 15053 restuni2 15059 cnrest2r 15119 cnptopresti 15120 cnptoprest 15121 lmss 15128 metrest 15388 tgioo 15436 2sqlem8 16013 2sqlem9 16014 peano5set 16727 |
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