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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 3219 | . 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 2200 ⊆ wss 3198 |
| 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 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-11 1552 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-in 3204 df-ss 3211 |
| This theorem is referenced by: elnn 4702 funimass4 5692 fvelimab 5698 ssimaex 5703 funconstss 5761 rexima 5890 ralima 5891 1st2nd 6339 f1o2ndf1 6388 tfri1dALT 6512 eldju1st 7261 axsuploc 8242 lbinf 9118 dfinfre 9126 lbzbi 9840 elfzom1elp1fzo 10437 ssfzo12 10459 seq3split 10740 seqsplitg 10741 shftlem 11367 uzwodc 12598 subgintm 13775 subrngintm 14216 subrgintm 14247 tgcl 14778 neipsm 14868 txbasval 14981 elmopn2 15163 metrest 15220 cncfmet 15306 negcncf 15319 ply1term 15457 plyconst 15459 reeff1olem 15485 usgruspgrben 16025 |
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