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Mirrors > Home > ILE Home > Th. List > sseqin2 | Unicode version |
Description: A relationship between subclass and intersection. Similar to Exercise 9 of [TakeutiZaring] p. 18. (Contributed by NM, 17-May-1994.) |
Ref | Expression |
---|---|
sseqin2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfss1 3321 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wceq 1342 cin 3110 wss 3111 |
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 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-v 2723 df-in 3117 df-ss 3124 |
This theorem is referenced by: dfss4st 3350 resabs1 4907 rescnvcnv 5060 frecfnom 6360 fiintim 6885 nn0supp 9157 uzin 9489 iooval2 9842 fzval2 9938 suprzubdc 11870 dfphi2 12131 resttopon 12718 restabs 12722 restopnb 12728 txcnmpt 12820 |
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