| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 23789 | . 2 ⊢ (𝐹 ∈ (Fil‘𝑋) ↔ (𝐹 ∈ (fBas‘𝑋) ∧ ∀𝑥 ∈ 𝒫 𝑋((𝐹 ∩ 𝒫 𝑥) ≠ ∅ → 𝑥 ∈ 𝐹))) | |
| 2 | 1 | simplbi 497 | 1 ⊢ (𝐹 ∈ (Fil‘𝑋) → 𝐹 ∈ (fBas‘𝑋)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 ≠ wne 2930 ∀wral 3049 ∩ cin 3898 ∅c0 4283 𝒫 cpw 4552 ‘cfv 6490 fBascfbas 21295 Filcfil 23787 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fv 6498 df-fil 23788 |
| This theorem is referenced by: 0nelfil 23791 filsspw 23793 filelss 23794 filin 23796 filtop 23797 snfbas 23808 fgfil 23817 elfilss 23818 filfinnfr 23819 fgabs 23821 filconn 23825 fgtr 23832 trfg 23833 ufilb 23848 ufilmax 23849 isufil2 23850 ssufl 23860 ufileu 23861 filufint 23862 ufilen 23872 fmfg 23891 fmufil 23901 fmid 23902 fmco 23903 ufldom 23904 hausflim 23923 flimrest 23925 flimclslem 23926 flfnei 23933 isflf 23935 flfcnp 23946 fclsrest 23966 fclsfnflim 23969 flimfnfcls 23970 isfcf 23976 cnpfcfi 23982 cnpfcf 23983 cnextcn 24009 cfilufg 24234 neipcfilu 24237 cnextucn 24244 ucnextcn 24245 cfilresi 25249 cfilres 25250 cmetss 25270 relcmpcmet 25272 cfilucfil3 25274 minveclem4a 25384 filnetlem4 36524 |
| Copyright terms: Public domain | W3C validator |