| 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 23904 | . 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 2142 ≠ wne 2957 ∀wral 3076 ∩ cin 3903 ∅c0 4285 𝒫 cpw 4555 ‘cfv 6521 fBascfbas 21409 Filcfil 23902 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pr 5390 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5542 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-iota 6477 df-fun 6523 df-fv 6529 df-fil 23903 |
| This theorem is referenced by: 0nelfil 23906 filsspw 23908 filelss 23909 filin 23911 filtop 23912 snfbas 23923 fgfil 23932 elfilss 23933 filfinnfr 23934 fgabs 23936 filconn 23940 fgtr 23947 trfg 23948 ufilb 23963 ufilmax 23964 isufil2 23965 ssufl 23975 ufileu 23976 filufint 23977 ufilen 23987 fmfg 24006 fmufil 24016 fmid 24017 fmco 24018 ufldom 24019 hausflim 24038 flimrest 24040 flimclslem 24041 flfnei 24048 isflf 24050 flfcnp 24061 fclsrest 24081 fclsfnflim 24084 flimfnfcls 24085 isfcf 24091 cnpfcfi 24097 cnpfcf 24098 cnextcn 24124 cfilufg 24349 neipcfilu 24352 cnextucn 24359 ucnextcn 24360 cfilresi 25354 cfilres 25355 cmetss 25375 relcmpcmet 25377 cfilucfil3 25379 minveclem4a 25489 filnetlem4 36738 |
| Copyright terms: Public domain | W3C validator |