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Mirrors > Home > MPE Home > Th. List > df-dir | Structured version Visualization version Unicode version |
Description: Define the class of all directed sets/directions. (Contributed by Jeff Hankins, 25-Nov-2009.) |
Ref | Expression |
---|---|
df-dir |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cdir 17228 | . 2 | |
2 | vr | . . . . . . 7 | |
3 | 2 | cv 1482 | . . . . . 6 |
4 | 3 | wrel 5119 | . . . . 5 |
5 | cid 5023 | . . . . . . 7 | |
6 | 3 | cuni 4436 | . . . . . . . 8 |
7 | 6 | cuni 4436 | . . . . . . 7 |
8 | 5, 7 | cres 5116 | . . . . . 6 |
9 | 8, 3 | wss 3574 | . . . . 5 |
10 | 4, 9 | wa 384 | . . . 4 |
11 | 3, 3 | ccom 5118 | . . . . . 6 |
12 | 11, 3 | wss 3574 | . . . . 5 |
13 | 7, 7 | cxp 5112 | . . . . . 6 |
14 | 3 | ccnv 5113 | . . . . . . 7 |
15 | 14, 3 | ccom 5118 | . . . . . 6 |
16 | 13, 15 | wss 3574 | . . . . 5 |
17 | 12, 16 | wa 384 | . . . 4 |
18 | 10, 17 | wa 384 | . . 3 |
19 | 18, 2 | cab 2608 | . 2 |
20 | 1, 19 | wceq 1483 | 1 |
Colors of variables: wff setvar class |
This definition is referenced by: isdir 17232 |
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