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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 5707 ffvresb 5810 fnfvimad 5890 ofrfval 6244 ofvalg 6245 ofrval 6246 off 6248 ofres 6250 ofco 6254 offres 6297 tpostpos 6430 smores3 6459 tfrlem5 6480 tfrexlem 6500 erinxp 6778 pmresg 6845 unfiin 7118 ltrelpi 7544 peano5nnnn 8112 peano5nni 9146 rexanuz 11549 bitsinv1 12524 structcnvcnv 13099 ressbasssd 13153 restsspw 13333 eltg4i 14781 ntrss2 14847 ntrin 14850 isopn3 14851 resttopon 14897 restuni2 14903 cnrest2r 14963 cnptopresti 14964 cnptoprest 14965 lmss 14972 metrest 15232 tgioo 15280 2sqlem8 15854 2sqlem9 15855 peano5set 16538 |
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