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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 3232 | . 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 2203 ⊆ wss 3211 |
| 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 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-11 1555 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-in 3217 df-ss 3224 |
| This theorem is referenced by: elnn 4728 funimass4 5727 fvelimab 5733 ssimaex 5738 funconstss 5796 rexima 5927 ralima 5928 1st2nd 6375 f1o2ndf1 6424 tfri1dALT 6582 eldju1st 7362 axsuploc 8346 lbinf 9222 dfinfre 9230 lbzbi 9948 elfzom1elp1fzo 10547 ssfzo12 10569 seq3split 10850 seqsplitg 10851 shftlem 11501 uzwodc 12733 subgintm 13915 subrngintm 14357 subrgintm 14388 tgcl 14929 neipsm 15019 txbasval 15132 elmopn2 15314 metrest 15371 cncfmet 15457 negcncf 15470 ply1term 15608 plyconst 15610 reeff1olem 15636 usgruspgrben 16181 |
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