Description: Idempotence of the "locally" predicate, i.e. being "locally A " is a local property. (Contributed by Mario Carneiro, 2-Mar-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | llyidm | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | llytop | |
|
2 | llyi | |
|
3 | simprr3 | |
|
4 | simprl | |
|
5 | ssidd | |
|
6 | 1 | 3ad2ant1 | |
7 | 6 | adantr | |
8 | restopn2 | |
|
9 | 7 4 8 | syl2anc | |
10 | 4 5 9 | mpbir2and | |
11 | simprr2 | |
|
12 | llyi | |
|
13 | 3 10 11 12 | syl3anc | |
14 | restopn2 | |
|
15 | 7 4 14 | syl2anc | |
16 | simpl | |
|
17 | 15 16 | syl6bi | |
18 | simprl | |
|
19 | simprr1 | |
|
20 | simprr1 | |
|
21 | 20 | adantr | |
22 | 19 21 | sstrd | |
23 | velpw | |
|
24 | 22 23 | sylibr | |
25 | 18 24 | elind | |
26 | simprr2 | |
|
27 | 7 | adantr | |
28 | simplrl | |
|
29 | restabs | |
|
30 | 27 19 28 29 | syl3anc | |
31 | simprr3 | |
|
32 | 30 31 | eqeltrrd | |
33 | 25 26 32 | jca32 | |
34 | 33 | ex | |
35 | 17 34 | syland | |
36 | 35 | reximdv2 | |
37 | 13 36 | mpd | |
38 | 2 37 | rexlimddv | |
39 | 38 | 3expb | |
40 | 39 | ralrimivva | |
41 | islly | |
|
42 | 1 40 41 | sylanbrc | |
43 | 42 | ssriv | |
44 | llyrest | |
|
45 | 44 | adantl | |
46 | llytop | |
|
47 | 46 | ssriv | |
48 | 47 | a1i | |
49 | 45 48 | restlly | |
50 | 49 | mptru | |
51 | 43 50 | eqssi | |