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Mirrors > Home > NFE Home > Th. List > sselda | GIF version |
Description: Membership deduction from subclass relationship. (Contributed by NM, 26-Jun-2014.) |
Ref | Expression |
---|---|
sseld.1 | ⊢ (φ → A ⊆ B) |
Ref | Expression |
---|---|
sselda | ⊢ ((φ ∧ C ∈ A) → C ∈ B) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseld.1 | . . 3 ⊢ (φ → A ⊆ B) | |
2 | 1 | sseld 3272 | . 2 ⊢ (φ → (C ∈ A → C ∈ B)) |
3 | 2 | imp 418 | 1 ⊢ ((φ ∧ C ∈ A) → C ∈ B) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 358 ∈ wcel 1710 ⊆ wss 3257 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2478 df-v 2861 df-nin 3211 df-compl 3212 df-in 3213 df-ss 3259 |
This theorem is referenced by: vfinncvntsp 4549 vfinspsslem1 4550 vfinspclt 4552 ffvresb 5431 spaccl 6286 spacis 6288 nchoicelem4 6292 |
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