Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > rfcnpre3 | Structured version Visualization version Unicode version |
Description: If F is a continuous function with respect to the standard topology, then the preimage A of the values greater or equal than a given real B is a closed set. (Contributed by Glauco Siliprandi, 20-Apr-2017.) |
Ref | Expression |
---|---|
rfcnpre3.2 | |
rfcnpre3.3 | |
rfcnpre3.4 | |
rfcnpre3.5 | |
rfcnpre3.6 | |
rfcnpre3.8 |
Ref | Expression |
---|---|
rfcnpre3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rfcnpre3.3 | . . . . . . . 8 | |
2 | rfcnpre3.4 | . . . . . . . 8 | |
3 | eqid 2622 | . . . . . . . 8 | |
4 | rfcnpre3.8 | . . . . . . . 8 | |
5 | 1, 2, 3, 4 | fcnre 39184 | . . . . . . 7 |
6 | ffn 6045 | . . . . . . 7 | |
7 | elpreima 6337 | . . . . . . 7 | |
8 | 5, 6, 7 | 3syl 18 | . . . . . 6 |
9 | rfcnpre3.6 | . . . . . . . . . . 11 | |
10 | 9 | rexrd 10089 | . . . . . . . . . 10 |
11 | 10 | adantr 481 | . . . . . . . . 9 |
12 | pnfxr 10092 | . . . . . . . . 9 | |
13 | elico1 12218 | . . . . . . . . 9 | |
14 | 11, 12, 13 | sylancl 694 | . . . . . . . 8 |
15 | simpr2 1068 | . . . . . . . . 9 | |
16 | 5 | ffvelrnda 6359 | . . . . . . . . . . . 12 |
17 | 16 | rexrd 10089 | . . . . . . . . . . 11 |
18 | 17 | adantr 481 | . . . . . . . . . 10 |
19 | simpr 477 | . . . . . . . . . 10 | |
20 | 16 | adantr 481 | . . . . . . . . . . 11 |
21 | ltpnf 11954 | . . . . . . . . . . 11 | |
22 | 20, 21 | syl 17 | . . . . . . . . . 10 |
23 | 18, 19, 22 | 3jca 1242 | . . . . . . . . 9 |
24 | 15, 23 | impbida 877 | . . . . . . . 8 |
25 | 14, 24 | bitrd 268 | . . . . . . 7 |
26 | 25 | pm5.32da 673 | . . . . . 6 |
27 | 8, 26 | bitrd 268 | . . . . 5 |
28 | nfcv 2764 | . . . . . 6 | |
29 | nfcv 2764 | . . . . . 6 | |
30 | nfcv 2764 | . . . . . . 7 | |
31 | nfcv 2764 | . . . . . . 7 | |
32 | rfcnpre3.2 | . . . . . . . 8 | |
33 | 32, 28 | nffv 6198 | . . . . . . 7 |
34 | 30, 31, 33 | nfbr 4699 | . . . . . 6 |
35 | fveq2 6191 | . . . . . . 7 | |
36 | 35 | breq2d 4665 | . . . . . 6 |
37 | 28, 29, 34, 36 | elrabf 3360 | . . . . 5 |
38 | 27, 37 | syl6bbr 278 | . . . 4 |
39 | 38 | eqrdv 2620 | . . 3 |
40 | rfcnpre3.5 | . . 3 | |
41 | 39, 40 | syl6eqr 2674 | . 2 |
42 | icopnfcld 22571 | . . . . 5 | |
43 | 9, 42 | syl 17 | . . . 4 |
44 | 1 | fveq2i 6194 | . . . 4 |
45 | 43, 44 | syl6eleqr 2712 | . . 3 |
46 | cnclima 21072 | . . 3 | |
47 | 4, 45, 46 | syl2anc 693 | . 2 |
48 | 41, 47 | eqeltrrd 2702 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 w3a 1037 wceq 1483 wcel 1990 wnfc 2751 crab 2916 cuni 4436 class class class wbr 4653 ccnv 5113 crn 5115 cima 5117 wfn 5883 wf 5884 cfv 5888 (class class class)co 6650 cr 9935 cpnf 10071 cxr 10073 clt 10074 cle 10075 cioo 12175 cico 12177 ctg 16098 ccld 20820 ccn 21028 |
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-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 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-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 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-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 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-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 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-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-er 7742 df-map 7859 df-en 7956 df-dom 7957 df-sdom 7958 df-sup 8348 df-inf 8349 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-n0 11293 df-z 11378 df-uz 11688 df-q 11789 df-ioo 12179 df-ico 12181 df-topgen 16104 df-top 20699 df-topon 20716 df-bases 20750 df-cld 20823 df-cn 21031 |
This theorem is referenced by: stoweidlem59 40276 |
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