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| Mirrors > Home > ILE Home > Th. List > ssel2 | GIF version | ||
| Description: Membership relationships follow from a subclass relationship. (Contributed by NM, 7-Jun-2004.) |
| Ref | Expression |
|---|---|
| ssel2 | ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ∈ 𝐴) → 𝐶 ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssel 3221 | . 2 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ∈ 𝐴 → 𝐶 ∈ 𝐵)) | |
| 2 | 1 | imp 124 | 1 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ∈ 𝐴) → 𝐶 ∈ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2202 ⊆ wss 3200 |
| 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-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-11 1554 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-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-in 3206 df-ss 3213 |
| This theorem is referenced by: elnn 4704 funimass4 5696 fvelimab 5702 ssimaex 5707 funconstss 5765 rexima 5895 ralima 5896 1st2nd 6344 f1o2ndf1 6393 tfri1dALT 6517 eldju1st 7270 axsuploc 8252 lbinf 9128 dfinfre 9136 lbzbi 9850 elfzom1elp1fzo 10448 ssfzo12 10470 seq3split 10751 seqsplitg 10752 shftlem 11381 uzwodc 12613 subgintm 13790 subrngintm 14232 subrgintm 14263 tgcl 14794 neipsm 14884 txbasval 14997 elmopn2 15179 metrest 15236 cncfmet 15322 negcncf 15335 ply1term 15473 plyconst 15475 reeff1olem 15501 usgruspgrben 16043 |
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