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| Description: The intersection of two classes is a subset of one of them. Part of Exercise 12 of [TakeutiZaring] p. 18. |
| Ref | Expression |
|---|---|
| inss1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elin 2210 |
. . 3
| |
| 2 | 1 | pm3.26bi 322 |
. 2
|
| 3 | 2 | ssriv 2072 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: inss2 2234 ssin 2235 ssinss1 2240 unabs 2241 nssinpss 2243 dfin4 2251 inv1 2303 difdisj 2341 wefrc 2949 ordtri3or 2985 onfr 2992 relin1 3268 resss 3389 cnvcnvss 3494 funimass2 3579 fnresin1 3607 ssimaex 3774 sbthlem7 4459 zfregs 4657 brdom3 4811 brdom5 4812 brdom4 4813 imadomg 4816 tgval2t 7616 unitgt 7622 cnsscnp 7769 bcthlem14 8009 bcthlem16 8011 phnv 8469 minveceu 8579 minvecle 8582 chm1 9374 chdmm1 9395 chabs1t 9434 chabs2t 9435 ledi 9454 lejdi 9456 pjoml4 9525 cmbr3 9538 cmbr4 9539 cmm1 9544 osumcor2 9585 3oalem4 9605 pjssm 9621 pjocin 9638 pjin 9639 mayete3 9668 riesz4t 9992 riesz1t 9993 cnlnadjeu 10005 cnlnadjeut 10006 cnlnssadj 10008 nmopadjle 10016 pjin1 10115 pjclem1 10118 stji1 10164 stm1 10165 dmdbr2 10225 ssmd1 10233 mdslj2 10242 mdsl2b 10245 mdslmd1lem1 10247 mdslmd2 10252 atoml 10304 atcvat4 10319 sumdmdlem2 10341 dmdbr5at 10344 dmdbr6at 10345 dmdbr7at 10346 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-10 968 ax-12 970 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 983 df-sb 1174 df-clab 1467 df-cleq 1472 df-clel 1475 df-v 1815 df-in 2054 df-ss 2056 |