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Mirrors > Home > MPE Home > Th. List > isdrs | Structured version Visualization version Unicode version |
Description: Property of being a directed set. (Contributed by Stefan O'Rear, 1-Feb-2015.) |
Ref | Expression |
---|---|
isdrs.b | |
isdrs.l |
Ref | Expression |
---|---|
isdrs | Dirset |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6191 | . . . . . 6 | |
2 | isdrs.b | . . . . . 6 | |
3 | 1, 2 | syl6eqr 2674 | . . . . 5 |
4 | fveq2 6191 | . . . . . . 7 | |
5 | isdrs.l | . . . . . . 7 | |
6 | 4, 5 | syl6eqr 2674 | . . . . . 6 |
7 | 6 | sbceq1d 3440 | . . . . 5 |
8 | 3, 7 | sbceqbid 3442 | . . . 4 |
9 | fvex 6201 | . . . . . 6 | |
10 | 2, 9 | eqeltri 2697 | . . . . 5 |
11 | fvex 6201 | . . . . . 6 | |
12 | 5, 11 | eqeltri 2697 | . . . . 5 |
13 | neeq1 2856 | . . . . . . 7 | |
14 | 13 | adantr 481 | . . . . . 6 |
15 | rexeq 3139 | . . . . . . . . 9 | |
16 | 15 | raleqbi1dv 3146 | . . . . . . . 8 |
17 | 16 | raleqbi1dv 3146 | . . . . . . 7 |
18 | breq 4655 | . . . . . . . . . 10 | |
19 | breq 4655 | . . . . . . . . . 10 | |
20 | 18, 19 | anbi12d 747 | . . . . . . . . 9 |
21 | 20 | rexbidv 3052 | . . . . . . . 8 |
22 | 21 | 2ralbidv 2989 | . . . . . . 7 |
23 | 17, 22 | sylan9bb 736 | . . . . . 6 |
24 | 14, 23 | anbi12d 747 | . . . . 5 |
25 | 10, 12, 24 | sbc2ie 3505 | . . . 4 |
26 | 8, 25 | syl6bb 276 | . . 3 |
27 | df-drs 16929 | . . 3 Dirset | |
28 | 26, 27 | elrab2 3366 | . 2 Dirset |
29 | 3anass 1042 | . 2 | |
30 | 28, 29 | bitr4i 267 | 1 Dirset |
Colors of variables: wff setvar class |
Syntax hints: wb 196 wa 384 w3a 1037 wceq 1483 wcel 1990 wne 2794 wral 2912 wrex 2913 cvv 3200 wsbc 3435 c0 3915 class class class wbr 4653 cfv 5888 cbs 15857 cple 15948 cpreset 16926 Dirsetcdrs 16927 |
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-nul 4789 |
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-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 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-iota 5851 df-fv 5896 df-drs 16929 |
This theorem is referenced by: drsdir 16935 drsprs 16936 drsbn0 16937 isdrs2 16939 isipodrs 17161 |
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