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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 3373 |
. 2
| |
| 2 | inss1 3401 |
. 2
| |
| 3 | 1, 2 | eqsstrri 3234 |
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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2189 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-v 2778 df-in 3180 df-ss 3187 |
| This theorem is referenced by: difin0 3542 bnd2 4233 ordin 4450 relin2 4812 relres 5006 ssrnres 5144 cnvcnv 5154 funinsn 5342 funimaexg 5377 fnresin2 5411 ssimaex 5663 ffvresb 5766 ofrfval 6190 ofvalg 6191 ofrval 6192 off 6194 ofres 6196 ofco 6200 offres 6243 tpostpos 6373 smores3 6402 tfrlem5 6423 tfrexlem 6443 erinxp 6719 pmresg 6786 unfiin 7049 ltrelpi 7472 peano5nnnn 8040 peano5nni 9074 rexanuz 11414 bitsinv1 12388 structcnvcnv 12963 ressbasssd 13016 restsspw 13196 eltg4i 14642 ntrss2 14708 ntrin 14711 isopn3 14712 resttopon 14758 restuni2 14764 cnrest2r 14824 cnptopresti 14825 cnptoprest 14826 lmss 14833 metrest 15093 tgioo 15141 2sqlem8 15715 2sqlem9 15716 peano5set 16075 |
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