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| Mirrors > Home > MPE Home > Th. List > acsfn0 | Structured version Visualization version GIF version | ||
| Description: Algebraicity of a point closure condition. (Contributed by Stefan O'Rear, 3-Apr-2015.) |
| Ref | Expression |
|---|---|
| acsfn0 | ⊢ ((𝑋 ∈ 𝑉 ∧ 𝐾 ∈ 𝑋) → {𝑎 ∈ 𝒫 𝑋 ∣ 𝐾 ∈ 𝑎} ∈ (ACS‘𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ss 4349 | . . . 4 ⊢ ∅ ⊆ 𝑎 | |
| 2 | 1 | a1bi 365 | . . 3 ⊢ (𝐾 ∈ 𝑎 ↔ (∅ ⊆ 𝑎 → 𝐾 ∈ 𝑎)) |
| 3 | 2 | rabbii 3417 | . 2 ⊢ {𝑎 ∈ 𝒫 𝑋 ∣ 𝐾 ∈ 𝑎} = {𝑎 ∈ 𝒫 𝑋 ∣ (∅ ⊆ 𝑎 → 𝐾 ∈ 𝑎)} |
| 4 | 0ss 4349 | . . 3 ⊢ ∅ ⊆ 𝑋 | |
| 5 | 0fi 9048 | . . 3 ⊢ ∅ ∈ Fin | |
| 6 | acsfn 17795 | . . 3 ⊢ (((𝑋 ∈ 𝑉 ∧ 𝐾 ∈ 𝑋) ∧ (∅ ⊆ 𝑋 ∧ ∅ ∈ Fin)) → {𝑎 ∈ 𝒫 𝑋 ∣ (∅ ⊆ 𝑎 → 𝐾 ∈ 𝑎)} ∈ (ACS‘𝑋)) | |
| 7 | 4, 5, 6 | mpanr12 718 | . 2 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝐾 ∈ 𝑋) → {𝑎 ∈ 𝒫 𝑋 ∣ (∅ ⊆ 𝑎 → 𝐾 ∈ 𝑎)} ∈ (ACS‘𝑋)) |
| 8 | 3, 7 | eqeltrid 2864 | 1 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝐾 ∈ 𝑋) → {𝑎 ∈ 𝒫 𝑋 ∣ 𝐾 ∈ 𝑎} ∈ (ACS‘𝑋)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 {crab 3412 ⊆ wss 3898 ∅c0 4278 𝒫 cpw 4556 ‘cfv 6527 Fincfn 8951 ACScacs 17717 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-ord 6354 df-on 6355 df-lim 6356 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-om 7861 df-en 8952 df-fin 8955 df-mre 17718 df-acs 17721 |
| This theorem is used by: submacs 18985 |
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