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Mirrors > Home > MPE Home > Th. List > elfg | Structured version Visualization version GIF version |
Description: A condition for elements of a generated filter. (Contributed by Jeff Hankins, 3-Sep-2009.) (Revised by Stefan O'Rear, 2-Aug-2015.) |
Ref | Expression |
---|---|
elfg | ⊢ (𝐹 ∈ (fBas‘𝑋) → (𝐴 ∈ (𝑋filGen𝐹) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐹 𝑥 ⊆ 𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fgval 22560 | . . 3 ⊢ (𝐹 ∈ (fBas‘𝑋) → (𝑋filGen𝐹) = {𝑦 ∈ 𝒫 𝑋 ∣ (𝐹 ∩ 𝒫 𝑦) ≠ ∅}) | |
2 | 1 | eleq2d 2838 | . 2 ⊢ (𝐹 ∈ (fBas‘𝑋) → (𝐴 ∈ (𝑋filGen𝐹) ↔ 𝐴 ∈ {𝑦 ∈ 𝒫 𝑋 ∣ (𝐹 ∩ 𝒫 𝑦) ≠ ∅})) |
3 | pweq 4508 | . . . . . 6 ⊢ (𝑦 = 𝐴 → 𝒫 𝑦 = 𝒫 𝐴) | |
4 | 3 | ineq2d 4118 | . . . . 5 ⊢ (𝑦 = 𝐴 → (𝐹 ∩ 𝒫 𝑦) = (𝐹 ∩ 𝒫 𝐴)) |
5 | 4 | neeq1d 3011 | . . . 4 ⊢ (𝑦 = 𝐴 → ((𝐹 ∩ 𝒫 𝑦) ≠ ∅ ↔ (𝐹 ∩ 𝒫 𝐴) ≠ ∅)) |
6 | 5 | elrab 3603 | . . 3 ⊢ (𝐴 ∈ {𝑦 ∈ 𝒫 𝑋 ∣ (𝐹 ∩ 𝒫 𝑦) ≠ ∅} ↔ (𝐴 ∈ 𝒫 𝑋 ∧ (𝐹 ∩ 𝒫 𝐴) ≠ ∅)) |
7 | elfvdm 6688 | . . . . 5 ⊢ (𝐹 ∈ (fBas‘𝑋) → 𝑋 ∈ dom fBas) | |
8 | elpw2g 5212 | . . . . 5 ⊢ (𝑋 ∈ dom fBas → (𝐴 ∈ 𝒫 𝑋 ↔ 𝐴 ⊆ 𝑋)) | |
9 | 7, 8 | syl 17 | . . . 4 ⊢ (𝐹 ∈ (fBas‘𝑋) → (𝐴 ∈ 𝒫 𝑋 ↔ 𝐴 ⊆ 𝑋)) |
10 | elin 3875 | . . . . . . . 8 ⊢ (𝑥 ∈ (𝐹 ∩ 𝒫 𝐴) ↔ (𝑥 ∈ 𝐹 ∧ 𝑥 ∈ 𝒫 𝐴)) | |
11 | velpw 4497 | . . . . . . . . 9 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) | |
12 | 11 | anbi2i 626 | . . . . . . . 8 ⊢ ((𝑥 ∈ 𝐹 ∧ 𝑥 ∈ 𝒫 𝐴) ↔ (𝑥 ∈ 𝐹 ∧ 𝑥 ⊆ 𝐴)) |
13 | 10, 12 | bitri 278 | . . . . . . 7 ⊢ (𝑥 ∈ (𝐹 ∩ 𝒫 𝐴) ↔ (𝑥 ∈ 𝐹 ∧ 𝑥 ⊆ 𝐴)) |
14 | 13 | exbii 1850 | . . . . . 6 ⊢ (∃𝑥 𝑥 ∈ (𝐹 ∩ 𝒫 𝐴) ↔ ∃𝑥(𝑥 ∈ 𝐹 ∧ 𝑥 ⊆ 𝐴)) |
15 | n0 4244 | . . . . . 6 ⊢ ((𝐹 ∩ 𝒫 𝐴) ≠ ∅ ↔ ∃𝑥 𝑥 ∈ (𝐹 ∩ 𝒫 𝐴)) | |
16 | df-rex 3077 | . . . . . 6 ⊢ (∃𝑥 ∈ 𝐹 𝑥 ⊆ 𝐴 ↔ ∃𝑥(𝑥 ∈ 𝐹 ∧ 𝑥 ⊆ 𝐴)) | |
17 | 14, 15, 16 | 3bitr4i 307 | . . . . 5 ⊢ ((𝐹 ∩ 𝒫 𝐴) ≠ ∅ ↔ ∃𝑥 ∈ 𝐹 𝑥 ⊆ 𝐴) |
18 | 17 | a1i 11 | . . . 4 ⊢ (𝐹 ∈ (fBas‘𝑋) → ((𝐹 ∩ 𝒫 𝐴) ≠ ∅ ↔ ∃𝑥 ∈ 𝐹 𝑥 ⊆ 𝐴)) |
19 | 9, 18 | anbi12d 634 | . . 3 ⊢ (𝐹 ∈ (fBas‘𝑋) → ((𝐴 ∈ 𝒫 𝑋 ∧ (𝐹 ∩ 𝒫 𝐴) ≠ ∅) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐹 𝑥 ⊆ 𝐴))) |
20 | 6, 19 | syl5bb 286 | . 2 ⊢ (𝐹 ∈ (fBas‘𝑋) → (𝐴 ∈ {𝑦 ∈ 𝒫 𝑋 ∣ (𝐹 ∩ 𝒫 𝑦) ≠ ∅} ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐹 𝑥 ⊆ 𝐴))) |
21 | 2, 20 | bitrd 282 | 1 ⊢ (𝐹 ∈ (fBas‘𝑋) → (𝐴 ∈ (𝑋filGen𝐹) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐹 𝑥 ⊆ 𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1539 ∃wex 1782 ∈ wcel 2112 ≠ wne 2952 ∃wrex 3072 {crab 3075 ∩ cin 3858 ⊆ wss 3859 ∅c0 4226 𝒫 cpw 4492 dom cdm 5522 ‘cfv 6333 (class class class)co 7148 fBascfbas 20144 filGencfg 20145 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1912 ax-6 1971 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2159 ax-12 2176 ax-ext 2730 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 |
This theorem depends on definitions: df-bi 210 df-an 401 df-or 846 df-3an 1087 df-tru 1542 df-ex 1783 df-nf 1787 df-sb 2071 df-mo 2558 df-eu 2589 df-clab 2737 df-cleq 2751 df-clel 2831 df-nfc 2902 df-ne 2953 df-ral 3076 df-rex 3077 df-rab 3080 df-v 3412 df-sbc 3698 df-dif 3862 df-un 3864 df-in 3866 df-ss 3876 df-nul 4227 df-if 4419 df-pw 4494 df-sn 4521 df-pr 4523 df-op 4527 df-uni 4797 df-br 5031 df-opab 5093 df-id 5428 df-xp 5528 df-rel 5529 df-cnv 5530 df-co 5531 df-dm 5532 df-iota 6292 df-fun 6335 df-fv 6341 df-ov 7151 df-oprab 7152 df-mpo 7153 df-fg 20154 |
This theorem is referenced by: ssfg 22562 fgss 22563 fgss2 22564 fgfil 22565 elfilss 22566 fgcl 22568 fgabs 22569 fgtr 22580 trfg 22581 uffix 22611 elfm 22637 elfm2 22638 elfm3 22640 fbflim 22666 flffbas 22685 fclsbas 22711 isucn2 22970 metust 23250 cfilucfil 23251 metuel 23256 fgcfil 23961 fgmin 34098 filnetlem4 34109 |
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