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Mirrors > Home > MPE Home > Th. List > opnnei | Structured version Visualization version Unicode version |
Description: A set is open iff it is a neighborhood of all of its points. (Contributed by Jeff Hankins, 15-Sep-2009.) |
Ref | Expression |
---|---|
opnnei |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0opn 20709 | . . . . 5 | |
2 | 1 | adantr 481 | . . . 4 |
3 | eleq1 2689 | . . . . 5 | |
4 | 3 | adantl 482 | . . . 4 |
5 | 2, 4 | mpbird 247 | . . 3 |
6 | rzal 4073 | . . . 4 | |
7 | 6 | adantl 482 | . . 3 |
8 | 5, 7 | 2thd 255 | . 2 |
9 | opnneip 20923 | . . . . . . 7 | |
10 | 9 | 3expia 1267 | . . . . . 6 |
11 | 10 | ralrimiv 2965 | . . . . 5 |
12 | 11 | ex 450 | . . . 4 |
13 | 12 | adantr 481 | . . 3 |
14 | df-ne 2795 | . . . . . 6 | |
15 | r19.2z 4060 | . . . . . . 7 | |
16 | 15 | ex 450 | . . . . . 6 |
17 | 14, 16 | sylbir 225 | . . . . 5 |
18 | eqid 2622 | . . . . . . . 8 | |
19 | 18 | neii1 20910 | . . . . . . 7 |
20 | 19 | ex 450 | . . . . . 6 |
21 | 20 | rexlimdvw 3034 | . . . . 5 |
22 | 17, 21 | sylan9r 690 | . . . 4 |
23 | 18 | ntrss2 20861 | . . . . . . . . . . 11 |
24 | 23 | adantr 481 | . . . . . . . . . 10 |
25 | vex 3203 | . . . . . . . . . . . . 13 | |
26 | 25 | snss 4316 | . . . . . . . . . . . 12 |
27 | 26 | ralbii 2980 | . . . . . . . . . . 11 |
28 | dfss3 3592 | . . . . . . . . . . . . 13 | |
29 | 28 | biimpri 218 | . . . . . . . . . . . 12 |
30 | 29 | adantl 482 | . . . . . . . . . . 11 |
31 | 27, 30 | sylan2br 493 | . . . . . . . . . 10 |
32 | 24, 31 | eqssd 3620 | . . . . . . . . 9 |
33 | 32 | ex 450 | . . . . . . . 8 |
34 | 25 | snss 4316 | . . . . . . . . . . . 12 |
35 | sstr2 3610 | . . . . . . . . . . . . . 14 | |
36 | 35 | com12 32 | . . . . . . . . . . . . 13 |
37 | 36 | adantl 482 | . . . . . . . . . . . 12 |
38 | 34, 37 | syl5bi 232 | . . . . . . . . . . 11 |
39 | 38 | imp 445 | . . . . . . . . . 10 |
40 | 18 | neiint 20908 | . . . . . . . . . . . 12 |
41 | 40 | 3com23 1271 | . . . . . . . . . . 11 |
42 | 41 | 3expa 1265 | . . . . . . . . . 10 |
43 | 39, 42 | syldan 487 | . . . . . . . . 9 |
44 | 43 | ralbidva 2985 | . . . . . . . 8 |
45 | 18 | isopn3 20870 | . . . . . . . 8 |
46 | 33, 44, 45 | 3imtr4d 283 | . . . . . . 7 |
47 | 46 | ex 450 | . . . . . 6 |
48 | 47 | com23 86 | . . . . 5 |
49 | 48 | adantr 481 | . . . 4 |
50 | 22, 49 | mpdd 43 | . . 3 |
51 | 13, 50 | impbid 202 | . 2 |
52 | 8, 51 | pm2.61dan 832 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wi 4 wb 196 wa 384 wceq 1483 wcel 1990 wne 2794 wral 2912 wrex 2913 wss 3574 c0 3915 csn 4177 cuni 4436 cfv 5888 ctop 20698 cnt 20821 cnei 20901 |
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-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
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-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 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-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-top 20699 df-ntr 20824 df-nei 20902 |
This theorem is referenced by: neiptopreu 20937 flimcf 21786 |
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