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Mirrors > Home > MPE Home > Th. List > dirge | Structured version Visualization version Unicode version |
Description: For any two elements of a directed set, there exists a third element greater than or equal to both. (Note that this does not say that the two elements have a least upper bound.) (Contributed by Jeff Hankins, 25-Nov-2009.) (Revised by Mario Carneiro, 22-Nov-2013.) |
Ref | Expression |
---|---|
dirge.1 |
Ref | Expression |
---|---|
dirge |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dirge.1 | . . . . . . 7 | |
2 | dirdm 17234 | . . . . . . 7 | |
3 | 1, 2 | syl5eq 2668 | . . . . . 6 |
4 | 3 | eleq2d 2687 | . . . . 5 |
5 | 3 | eleq2d 2687 | . . . . 5 |
6 | 4, 5 | anbi12d 747 | . . . 4 |
7 | eqid 2622 | . . . . . . . . 9 | |
8 | 7 | isdir 17232 | . . . . . . . 8 |
9 | 8 | ibi 256 | . . . . . . 7 |
10 | 9 | simprrd 797 | . . . . . 6 |
11 | codir 5516 | . . . . . 6 | |
12 | 10, 11 | sylib 208 | . . . . 5 |
13 | breq1 4656 | . . . . . . . 8 | |
14 | 13 | anbi1d 741 | . . . . . . 7 |
15 | 14 | exbidv 1850 | . . . . . 6 |
16 | breq1 4656 | . . . . . . . 8 | |
17 | 16 | anbi2d 740 | . . . . . . 7 |
18 | 17 | exbidv 1850 | . . . . . 6 |
19 | 15, 18 | rspc2v 3322 | . . . . 5 |
20 | 12, 19 | syl5com 31 | . . . 4 |
21 | 6, 20 | sylbid 230 | . . 3 |
22 | reldir 17233 | . . . . . . . . . 10 | |
23 | relelrn 5359 | . . . . . . . . . 10 | |
24 | 22, 23 | sylan 488 | . . . . . . . . 9 |
25 | 24 | ex 450 | . . . . . . . 8 |
26 | ssun2 3777 | . . . . . . . . . . 11 | |
27 | dmrnssfld 5384 | . . . . . . . . . . 11 | |
28 | 26, 27 | sstri 3612 | . . . . . . . . . 10 |
29 | 28, 3 | syl5sseqr 3654 | . . . . . . . . 9 |
30 | 29 | sseld 3602 | . . . . . . . 8 |
31 | 25, 30 | syld 47 | . . . . . . 7 |
32 | 31 | adantrd 484 | . . . . . 6 |
33 | 32 | ancrd 577 | . . . . 5 |
34 | 33 | eximdv 1846 | . . . 4 |
35 | df-rex 2918 | . . . 4 | |
36 | 34, 35 | syl6ibr 242 | . . 3 |
37 | 21, 36 | syld 47 | . 2 |
38 | 37 | 3impib 1262 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 w3a 1037 wceq 1483 wex 1704 wcel 1990 wral 2912 wrex 2913 cun 3572 wss 3574 cuni 4436 class class class wbr 4653 cid 5023 cxp 5112 ccnv 5113 cdm 5114 crn 5115 cres 5116 ccom 5118 wrel 5119 cdir 17228 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-dir 17230 |
This theorem is referenced by: tailfb 32372 |
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