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Mirrors > Home > MPE Home > Th. List > dirdm | Structured version Visualization version Unicode version |
Description: A direction's domain is equal to its field. (Contributed by Jeff Hankins, 25-Nov-2009.) (Revised by Mario Carneiro, 22-Nov-2013.) |
Ref | Expression |
---|---|
dirdm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssun1 3776 | . . . 4 | |
2 | dmrnssfld 5384 | . . . 4 | |
3 | 1, 2 | sstri 3612 | . . 3 |
4 | 3 | a1i 11 | . 2 |
5 | dmresi 5457 | . . 3 | |
6 | eqid 2622 | . . . . . . . 8 | |
7 | 6 | isdir 17232 | . . . . . . 7 |
8 | 7 | ibi 256 | . . . . . 6 |
9 | 8 | simpld 475 | . . . . 5 |
10 | 9 | simprd 479 | . . . 4 |
11 | dmss 5323 | . . . 4 | |
12 | 10, 11 | syl 17 | . . 3 |
13 | 5, 12 | syl5eqssr 3650 | . 2 |
14 | 4, 13 | eqssd 3620 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 wceq 1483 wcel 1990 cun 3572 wss 3574 cuni 4436 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: dirref 17235 dirge 17237 tailfval 32367 tailf 32370 filnetlem4 32376 |
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