| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 3242 | . 2 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ∈ 𝐴 → 𝐶 ∈ 𝐵)) | |
| 2 | 1 | imp 124 | 1 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ∈ 𝐴) → 𝐶 ∈ 𝐵) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ∈ wcel 2209 ⊆ wss 3220 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 |
| This theorem is used by: elnn 4753 funimass4 5753 fvelimab 5759 ssimaex 5764 funconstss 5827 rexima 5960 ralima 5961 1st2nd 6415 f1o2ndf1 6464 tfri1dALT 6622 eldju1st 7411 axsuploc 8398 lbinf 9280 dfinfre 9288 lbzbi 10025 elfzom1elp1fzo 10630 ssfzo12 10652 seq3split 10938 seqsplitg 10939 shftlem 11595 uzwodc 12830 subgintm 14050 subrngintm 14569 subrgintm 14600 tgcl 15214 neipsm 15304 txbasval 15417 elmopn2 15599 metrest 15656 cncfmet 15742 negcncf 15755 ply1term 15893 plyconst 15895 reeff1olem 15921 usgruspgrben 16525 |
| Copyright terms: Public domain | W3C validator |