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Mirrors > Home > ILE Home > Th. List > inss1 | 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 |
---|---|
inss1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elin 3259 | . . 3 | |
2 | 1 | simplbi 272 | . 2 |
3 | 2 | ssriv 3101 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 cin 3070 wss 3071 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-v 2688 df-in 3077 df-ss 3084 |
This theorem is referenced by: inss2 3297 ssinss1 3305 unabs 3307 inssddif 3317 inv1 3399 disjdif 3435 inundifss 3440 relin1 4657 resss 4843 resmpt3 4868 cnvcnvss 4993 funin 5194 funimass2 5201 fnresin1 5237 fnres 5239 fresin 5301 ssimaex 5482 fneqeql2 5529 isoini2 5720 ofrfval 5990 ofvalg 5991 ofrval 5992 off 5994 ofres 5996 ofco 6000 smores 6189 smores2 6191 tfrlem5 6211 pmresg 6570 unfiin 6814 sbthlem7 6851 peano5nnnn 7700 peano5nni 8723 rexanuz 10760 fvsetsid 11993 tgvalex 12219 tgval2 12220 eltg3 12226 tgcl 12233 tgdom 12241 tgidm 12243 epttop 12259 ntropn 12286 ntrin 12293 cnptopresti 12407 cnptoprest 12408 txcnmpt 12442 xmetres 12551 metres 12552 blin2 12601 metrest 12675 tgioo 12715 limcresi 12804 |
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