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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 3222 | . 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 3201 |
| 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 2213 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-in 3207 df-ss 3214 |
| This theorem is referenced by: elnn 4710 funimass4 5705 fvelimab 5711 ssimaex 5716 funconstss 5774 rexima 5905 ralima 5906 1st2nd 6353 f1o2ndf1 6402 tfri1dALT 6560 eldju1st 7313 axsuploc 8294 lbinf 9170 dfinfre 9178 lbzbi 9894 elfzom1elp1fzo 10493 ssfzo12 10515 seq3split 10796 seqsplitg 10797 shftlem 11439 uzwodc 12671 subgintm 13848 subrngintm 14290 subrgintm 14321 tgcl 14858 neipsm 14948 txbasval 15061 elmopn2 15243 metrest 15300 cncfmet 15386 negcncf 15399 ply1term 15537 plyconst 15539 reeff1olem 15565 usgruspgrben 16110 |
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