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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 3218 | . 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 3197 |
| 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 3203 df-ss 3210 |
| This theorem is referenced by: elnn 4699 funimass4 5689 fvelimab 5695 ssimaex 5700 funconstss 5758 rexima 5887 ralima 5888 1st2nd 6336 f1o2ndf1 6385 tfri1dALT 6508 eldju1st 7254 axsuploc 8235 lbinf 9111 dfinfre 9119 lbzbi 9828 elfzom1elp1fzo 10425 ssfzo12 10447 seq3split 10727 seqsplitg 10728 shftlem 11348 uzwodc 12579 subgintm 13756 subrngintm 14197 subrgintm 14228 tgcl 14759 neipsm 14849 txbasval 14962 elmopn2 15144 metrest 15201 cncfmet 15287 negcncf 15300 ply1term 15438 plyconst 15440 reeff1olem 15466 usgruspgrben 16005 |
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