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| Mirrors > Home > MPE Home > Th. List > filfbas | Structured version Visualization version GIF version | ||
| Description: A filter is a filter base. (Contributed by Jeff Hankins, 2-Sep-2009.) (Revised by Mario Carneiro, 28-Jul-2015.) |
| Ref | Expression |
|---|---|
| filfbas | ⊢ (𝐹 ∈ (Fil‘𝑋) → 𝐹 ∈ (fBas‘𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isfil 24175 | . 2 ⊢ (𝐹 ∈ (Fil‘𝑋) ↔ (𝐹 ∈ (fBas‘𝑋) ∧ ∀𝑥 ∈ 𝒫 𝑋((𝐹 ∩ 𝒫 𝑥) ≠ ∅ → 𝑥 ∈ 𝐹))) | |
| 2 | 1 | simplbi 502 | 1 ⊢ (𝐹 ∈ (Fil‘𝑋) → 𝐹 ∈ (fBas‘𝑋)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 ≠ wne 2955 ∀wral 3076 ∩ cin 4088 ∅c0 4277 𝒫 cpw 4556 ‘cfv 6543 fBascfbas 21675 Filcfil 24173 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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-sbc 3739 df-csb 3848 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6497 df-fun 6545 df-fv 6551 df-fil 24174 |
| This theorem is used by: 0nelfil 24177 filsspw 24179 filelss 24180 filin 24182 filtop 24183 snfbas 24194 fgfil 24203 elfilss 24204 filfinnfr 24205 fgabs 24207 filconn 24211 fgtr 24218 trfg 24219 ufilb 24234 ufilmax 24235 isufil2 24236 ssufl 24246 ufileu 24247 filufint 24248 ufilen 24258 fmfg 24277 fmufil 24287 fmid 24288 fmco 24289 ufldom 24290 hausflim 24309 flimrest 24311 flimclslem 24312 flfnei 24319 isflf 24321 flfcnp 24332 fclsrest 24352 fclsfnflim 24355 flimfnfcls 24356 isfcf 24362 cnpfcfi 24368 cnpfcf 24369 cnextcn 24395 cfilufg 24620 neipcfilu 24623 cnextucn 24630 ucnextcn 24631 cfilresi 25625 cfilres 25626 cmetss 25646 relcmpcmet 25648 cfilucfil3 25650 minveclem4a 25760 filnetlem4 37265 |
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