| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: A filter base is a subset of its generated filter. (Contributed by Jeff Hankins, 3-Sep-2009.) |
| Ref | Expression |
|---|---|
| fbssfg |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 1884 |
. . . 4
| |
| 2 | 1 | elfg 10284 |
. . 3
|
| 3 | elssuni 3206 |
. . . 4
| |
| 4 | ssid 2634 |
. . . . 5
| |
| 5 | sseq1 2637 |
. . . . . 6
| |
| 6 | 5 | rcla4ev 2381 |
. . . . 5
|
| 7 | 4, 6 | mpan2 760 |
. . . 4
|
| 8 | 3, 7 | jca 310 |
. . 3
|
| 9 | 2, 8 | syl5bir 227 |
. 2
|
| 10 | 9 | ssrdv 2622 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: fgbas 10286 fbfgss 10288 fgid 10289 hausfillim 10303 elfilmap2 10313 fgmin 15558 isufil2 15565 ufileu 15573 filufint 15574 flimcls 15588 fmfnfmlem4 15597 fmfnfm 15598 fmufil 15599 flimfbas 15601 fclusbas 15610 fclsfnflim 15614 flimfnfcls 15615 fcluscnp 15618 fcluscomp 15621 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-rex 2110 df-rab 2112 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-br 3339 df-opab 3396 df-id 3586 df-xp 4000 df-rel 4001 df-cnv 4002 df-co 4003 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-fun 4008 df-fv 4014 df-fg 10260 |