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Mirrors > Home > MPE Home > Th. List > nrmsep | Structured version Visualization version Unicode version |
Description: In a normal space, disjoint closed sets are separated by open sets. (Contributed by Jeff Hankins, 1-Feb-2010.) |
Ref | Expression |
---|---|
nrmsep |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nrmtop 21140 | . . . . . 6 | |
2 | 1 | ad2antrr 762 | . . . . 5 |
3 | elssuni 4467 | . . . . . 6 | |
4 | 3 | ad2antrl 764 | . . . . 5 |
5 | eqid 2622 | . . . . . 6 | |
6 | 5 | clscld 20851 | . . . . 5 |
7 | 2, 4, 6 | syl2anc 693 | . . . 4 |
8 | 5 | cldopn 20835 | . . . 4 |
9 | 7, 8 | syl 17 | . . 3 |
10 | simprrl 804 | . . 3 | |
11 | incom 3805 | . . . . 5 | |
12 | simprrr 805 | . . . . 5 | |
13 | 11, 12 | syl5eq 2668 | . . . 4 |
14 | simplr2 1104 | . . . . 5 | |
15 | 5 | cldss 20833 | . . . . 5 |
16 | reldisj 4020 | . . . . 5 | |
17 | 14, 15, 16 | 3syl 18 | . . . 4 |
18 | 13, 17 | mpbid 222 | . . 3 |
19 | 5 | sscls 20860 | . . . . . 6 |
20 | 2, 4, 19 | syl2anc 693 | . . . . 5 |
21 | ssrin 3838 | . . . . 5 | |
22 | 20, 21 | syl 17 | . . . 4 |
23 | disjdif 4040 | . . . 4 | |
24 | sseq0 3975 | . . . 4 | |
25 | 22, 23, 24 | sylancl 694 | . . 3 |
26 | sseq2 3627 | . . . . 5 | |
27 | ineq2 3808 | . . . . . 6 | |
28 | 27 | eqeq1d 2624 | . . . . 5 |
29 | 26, 28 | 3anbi23d 1402 | . . . 4 |
30 | 29 | rspcev 3309 | . . 3 |
31 | 9, 10, 18, 25, 30 | syl13anc 1328 | . 2 |
32 | nrmsep2 21160 | . 2 | |
33 | 31, 32 | reximddv 3018 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 w3a 1037 wceq 1483 wcel 1990 wrex 2913 cdif 3571 cin 3573 wss 3574 c0 3915 cuni 4436 cfv 5888 ctop 20698 ccld 20820 ccl 20822 cnrm 21114 |
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-int 4476 df-iun 4522 df-iin 4523 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-cld 20823 df-cls 20825 df-nrm 21121 |
This theorem is referenced by: isnrm3 21163 |
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