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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 22449 | . 2 ⊢ (𝐹 ∈ (Fil‘𝑋) ↔ (𝐹 ∈ (fBas‘𝑋) ∧ ∀𝑥 ∈ 𝒫 𝑋((𝐹 ∩ 𝒫 𝑥) ≠ ∅ → 𝑥 ∈ 𝐹))) | |
2 | 1 | simplbi 500 | 1 ⊢ (𝐹 ∈ (Fil‘𝑋) → 𝐹 ∈ (fBas‘𝑋)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2110 ≠ wne 3016 ∀wral 3138 ∩ cin 3934 ∅c0 4290 𝒫 cpw 4538 ‘cfv 6349 fBascfbas 20527 Filcfil 22447 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-opab 5121 df-mpt 5139 df-id 5454 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-iota 6308 df-fun 6351 df-fv 6357 df-fil 22448 |
This theorem is referenced by: 0nelfil 22451 filsspw 22453 filelss 22454 filin 22456 filtop 22457 snfbas 22468 fgfil 22477 elfilss 22478 filfinnfr 22479 fgabs 22481 filconn 22485 fgtr 22492 trfg 22493 ufilb 22508 ufilmax 22509 isufil2 22510 ssufl 22520 ufileu 22521 filufint 22522 ufilen 22532 fmfg 22551 fmufil 22561 fmid 22562 fmco 22563 ufldom 22564 hausflim 22583 flimrest 22585 flimclslem 22586 flfnei 22593 isflf 22595 flfcnp 22606 fclsrest 22626 fclsfnflim 22629 flimfnfcls 22630 isfcf 22636 cnpfcfi 22642 cnpfcf 22643 cnextcn 22669 cfilufg 22896 neipcfilu 22899 cnextucn 22906 ucnextcn 22907 cfilresi 23892 cfilres 23893 cmetss 23913 relcmpcmet 23915 cfilucfil3 23917 minveclem4a 24027 filnetlem4 33724 |
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