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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 5894 ralima 5895 1st2nd 6343 f1o2ndf1 6392 tfri1dALT 6516 eldju1st 7269 axsuploc 8251 lbinf 9127 dfinfre 9135 lbzbi 9849 elfzom1elp1fzo 10446 ssfzo12 10468 seq3split 10749 seqsplitg 10750 shftlem 11376 uzwodc 12607 subgintm 13784 subrngintm 14225 subrgintm 14256 tgcl 14787 neipsm 14877 txbasval 14990 elmopn2 15172 metrest 15229 cncfmet 15315 negcncf 15328 ply1term 15466 plyconst 15468 reeff1olem 15494 usgruspgrben 16036 |
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