| Mathbox for Jeff Hankins |
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Related theorems Unicode version |
| Description: For any subset of the base set of an ultrafilter, either the set is in the ultrafilter or the complement is. |
| Ref | Expression |
|---|---|
| ufilss.1 |
|
| Ref | Expression |
|---|---|
| ufilss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uniexg 3795 |
. . . . 5
| |
| 2 | ufilss.1 |
. . . . 5
| |
| 3 | 1, 2 | syl5eqel 1975 |
. . . 4
|
| 4 | elpw2g 3463 |
. . . 4
| |
| 5 | 3, 4 | syl 12 |
. . 3
|
| 6 | 2 | isufil 15564 |
. . . . 5
|
| 7 | 6 | simprbi 353 |
. . . 4
|
| 8 | eleq1 1957 |
. . . . . 6
| |
| 9 | difeq2 2719 |
. . . . . . 7
| |
| 10 | 9 | eleq1d 1963 |
. . . . . 6
|
| 11 | 8, 10 | orbi12d 689 |
. . . . 5
|
| 12 | 11 | rcla4cv 2377 |
. . . 4
|
| 13 | 7, 12 | syl 12 |
. . 3
|
| 14 | 5, 13 | sylbird 222 |
. 2
|
| 15 | 14 | imp 377 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ufprim 15569 ufcondr 15581 |
| 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-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-clab 1872 df-cleq 1877 df-clel 1880 df-ral 2109 df-rex 2110 df-rab 2112 df-v 2294 df-dif 2597 df-in 2603 df-ss 2605 df-pw 3035 df-uni 3178 df-ufil 15563 |