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Related theorems Unicode version |
| Description: Any subset of extended reals has a supremum. |
| Ref | Expression |
|---|---|
| xrsupss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssxr 5523 |
. . 3
| |
| 2 | df-3or 775 |
. . 3
| |
| 3 | 1, 2 | sylib 198 |
. 2
|
| 4 | xrsupsslem 6033 |
. . 3
| |
| 5 | ssdifss 2165 |
. . . . . 6
| |
| 6 | ssxr 5523 |
. . . . . . . 8
| |
| 7 | orcom 246 |
. . . . . . . . 9
| |
| 8 | df-3or 775 |
. . . . . . . . 9
| |
| 9 | mnfxr 5477 |
. . . . . . . . . . . . 13
| |
| 10 | 9 | elisseti 1815 |
. . . . . . . . . . . 12
|
| 11 | 10 | snid 2432 |
. . . . . . . . . . 11
|
| 12 | elndif 2161 |
. . . . . . . . . . 11
| |
| 13 | 11, 12 | ax-mp 7 |
. . . . . . . . . 10
|
| 14 | biorf 734 |
. . . . . . . . . 10
| |
| 15 | 13, 14 | ax-mp 7 |
. . . . . . . . 9
|
| 16 | 7, 8, 15 | 3bitr4 183 |
. . . . . . . 8
|
| 17 | 6, 16 | sylib 198 |
. . . . . . 7
|
| 18 | xrsupsslem 6033 |
. . . . . . 7
| |
| 19 | 17, 18 | mpdan 703 |
. . . . . 6
|
| 20 | 5, 19 | syl 10 |
. . . . 5
|
| 21 | 20 | adantr 389 |
. . . 4
|
| 22 | 10 | snss 2458 |
. . . . . . . . 9
|
| 23 | undif 2340 |
. . . . . . . . 9
| |
| 24 | uncom 2173 |
. . . . . . . . . 10
| |
| 25 | 24 | eqeq1i 1480 |
. . . . . . . . 9
|
| 26 | 22, 23, 25 | 3bitr 177 |
. . . . . . . 8
|
| 27 | raleq1 1784 |
. . . . . . . . 9
| |
| 28 | rexeq1 1785 |
. . . . . . . . . . 11
| |
| 29 | 28 | imbi2d 611 |
. . . . . . . . . 10
|
| 30 | 29 | ralbidv 1661 |
. . . . . . . . 9
|
| 31 | 27, 30 | anbi12d 627 |
. . . . . . . 8
|
| 32 | 26, 31 | sylbi 199 |
. . . . . . 7
|
| 33 | 32 | rexbidv 1662 |
. . . . . 6
|
| 34 | xrsupexmnf 6031 |
. . . . . 6
| |
| 35 | 33, 34 | syl5bi 208 |
. . . . 5
|
| 36 | 35 | adantl 388 |
. . . 4
|
| 37 | 21, 36 | mpd 26 |
. . 3
|
| 38 | 4, 37 | jaodan 426 |
. 2
|
| 39 | 3, 38 | mpdan 703 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: supxr 6038 supxrcl 6041 supxrun 6042 supxrunb1 6046 supxrunb2 6047 supxrub 6055 supxrleub 6056 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-9 964 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-rep 2689 ax-sep 2699 ax-nul 2706 ax-pow 2738 ax-pr 2775 ax-un 2862 ax-inf2 4608 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 775 df-3an 776 df-ex |