| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: A filter is a filter base. (Contributed by Jeff Hankins, 2-Sep-2009.) |
| Ref | Expression |
|---|---|
| filfbas |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 1884 |
. . . . 5
| |
| 2 | 1 | filusb 10267 |
. . . 4
|
| 3 | ne0i 2881 |
. . . 4
| |
| 4 | 2, 3 | syl 12 |
. . 3
|
| 5 | filesn 10268 |
. . . 4
| |
| 6 | df-nel 2020 |
. . . 4
| |
| 7 | 5, 6 | sylibr 217 |
. . 3
|
| 8 | filint 10269 |
. . . . . 6
| |
| 9 | ssid 2634 |
. . . . . . 7
| |
| 10 | 9 | a1i 8 |
. . . . . 6
|
| 11 | sseq1 2637 |
. . . . . . 7
| |
| 12 | 11 | rcla4ev 2381 |
. . . . . 6
|
| 13 | 8, 10, 12 | syl11anc 524 |
. . . . 5
|
| 14 | 13 | 3expib 1070 |
. . . 4
|
| 15 | 14 | r19.21aivv 2183 |
. . 3
|
| 16 | 4, 7, 15 | 3jca 1050 |
. 2
|
| 17 | isfbas2 10263 |
. 2
| |
| 18 | 16, 17 | mpbird 213 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: fgid 10289 hausfillim 10303 fbfgfmeq 10315 flimfnei 10319 isflimf 10323 holimf 10326 fbfgss2 14937 cnpfillim4 14947 isufil2 15565 ufileulem 15572 ufileu 15573 filufint 15574 uffixfr 15575 flimcls 15588 cnpfillim 15589 fmufil 15599 filfm 15600 flimfcnp 15602 fclsfnflim 15614 flimfnfcls 15615 fcluscnplem 15617 fcluscnp 15618 isfclusf 15625 flfssfcf 15629 uffcfflf 15630 |
| 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-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 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-3an 860 df-ex 1327 df-sb 1536 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-nel 2020 df-ral 2109 df-rex 2110 df-v 2294 df-dif 2597 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-uni 3178 df-fbas 10259 df-fil 10265 |