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Mirrors > Home > MPE Home > Th. List > relogcn | Structured version Visualization version GIF version |
Description: The real logarithm function is continuous. (Contributed by Mario Carneiro, 17-Feb-2015.) |
Ref | Expression |
---|---|
relogcn | ⊢ (log ↾ ℝ+) ∈ (ℝ+–cn→ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relogf1o 25750 | . . 3 ⊢ (log ↾ ℝ+):ℝ+–1-1-onto→ℝ | |
2 | f1of 6734 | . . 3 ⊢ ((log ↾ ℝ+):ℝ+–1-1-onto→ℝ → (log ↾ ℝ+):ℝ+⟶ℝ) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ (log ↾ ℝ+):ℝ+⟶ℝ |
4 | ax-resscn 10956 | . . 3 ⊢ ℝ ⊆ ℂ | |
5 | fss 6635 | . . . . 5 ⊢ (((log ↾ ℝ+):ℝ+⟶ℝ ∧ ℝ ⊆ ℂ) → (log ↾ ℝ+):ℝ+⟶ℂ) | |
6 | 3, 4, 5 | mp2an 688 | . . . 4 ⊢ (log ↾ ℝ+):ℝ+⟶ℂ |
7 | rpssre 12765 | . . . 4 ⊢ ℝ+ ⊆ ℝ | |
8 | ovex 7328 | . . . . . 6 ⊢ (1 / 𝑥) ∈ V | |
9 | dvrelog 25820 | . . . . . 6 ⊢ (ℝ D (log ↾ ℝ+)) = (𝑥 ∈ ℝ+ ↦ (1 / 𝑥)) | |
10 | 8, 9 | dmmpti 6595 | . . . . 5 ⊢ dom (ℝ D (log ↾ ℝ+)) = ℝ+ |
11 | dvcn 25113 | . . . . 5 ⊢ (((ℝ ⊆ ℂ ∧ (log ↾ ℝ+):ℝ+⟶ℂ ∧ ℝ+ ⊆ ℝ) ∧ dom (ℝ D (log ↾ ℝ+)) = ℝ+) → (log ↾ ℝ+) ∈ (ℝ+–cn→ℂ)) | |
12 | 10, 11 | mpan2 687 | . . . 4 ⊢ ((ℝ ⊆ ℂ ∧ (log ↾ ℝ+):ℝ+⟶ℂ ∧ ℝ+ ⊆ ℝ) → (log ↾ ℝ+) ∈ (ℝ+–cn→ℂ)) |
13 | 4, 6, 7, 12 | mp3an 1459 | . . 3 ⊢ (log ↾ ℝ+) ∈ (ℝ+–cn→ℂ) |
14 | cncffvrn 24089 | . . 3 ⊢ ((ℝ ⊆ ℂ ∧ (log ↾ ℝ+) ∈ (ℝ+–cn→ℂ)) → ((log ↾ ℝ+) ∈ (ℝ+–cn→ℝ) ↔ (log ↾ ℝ+):ℝ+⟶ℝ)) | |
15 | 4, 13, 14 | mp2an 688 | . 2 ⊢ ((log ↾ ℝ+) ∈ (ℝ+–cn→ℝ) ↔ (log ↾ ℝ+):ℝ+⟶ℝ) |
16 | 3, 15 | mpbir 230 | 1 ⊢ (log ↾ ℝ+) ∈ (ℝ+–cn→ℝ) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 205 ∧ w3a 1085 = wceq 1537 ∈ wcel 2101 ⊆ wss 3889 dom cdm 5591 ↾ cres 5593 ⟶wf 6443 –1-1-onto→wf1o 6446 (class class class)co 7295 ℂcc 10897 ℝcr 10898 1c1 10900 / cdiv 11660 ℝ+crp 12758 –cn→ccncf 24067 D cdv 25055 logclog 25738 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2103 ax-9 2111 ax-10 2132 ax-11 2149 ax-12 2166 ax-ext 2704 ax-rep 5212 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7608 ax-inf2 9427 ax-cnex 10955 ax-resscn 10956 ax-1cn 10957 ax-icn 10958 ax-addcl 10959 ax-addrcl 10960 ax-mulcl 10961 ax-mulrcl 10962 ax-mulcom 10963 ax-addass 10964 ax-mulass 10965 ax-distr 10966 ax-i2m1 10967 ax-1ne0 10968 ax-1rid 10969 ax-rnegex 10970 ax-rrecex 10971 ax-cnre 10972 ax-pre-lttri 10973 ax-pre-lttrn 10974 ax-pre-ltadd 10975 ax-pre-mulgt0 10976 ax-pre-sup 10977 ax-addf 10978 ax-mulf 10979 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2063 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2884 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3222 df-reu 3223 df-rab 3224 df-v 3436 df-sbc 3719 df-csb 3835 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3908 df-nul 4260 df-if 4463 df-pw 4538 df-sn 4565 df-pr 4567 df-tp 4569 df-op 4571 df-uni 4842 df-int 4883 df-iun 4929 df-iin 4930 df-br 5078 df-opab 5140 df-mpt 5161 df-tr 5195 df-id 5491 df-eprel 5497 df-po 5505 df-so 5506 df-fr 5546 df-se 5547 df-we 5548 df-xp 5597 df-rel 5598 df-cnv 5599 df-co 5600 df-dm 5601 df-rn 5602 df-res 5603 df-ima 5604 df-pred 6206 df-ord 6273 df-on 6274 df-lim 6275 df-suc 6276 df-iota 6399 df-fun 6449 df-fn 6450 df-f 6451 df-f1 6452 df-fo 6453 df-f1o 6454 df-fv 6455 df-isom 6456 df-riota 7252 df-ov 7298 df-oprab 7299 df-mpo 7300 df-of 7553 df-om 7733 df-1st 7851 df-2nd 7852 df-supp 7998 df-frecs 8117 df-wrecs 8148 df-recs 8222 df-rdg 8261 df-1o 8317 df-2o 8318 df-er 8518 df-map 8637 df-pm 8638 df-ixp 8706 df-en 8754 df-dom 8755 df-sdom 8756 df-fin 8757 df-fsupp 9157 df-fi 9198 df-sup 9229 df-inf 9230 df-oi 9297 df-card 9725 df-pnf 11039 df-mnf 11040 df-xr 11041 df-ltxr 11042 df-le 11043 df-sub 11235 df-neg 11236 df-div 11661 df-nn 12002 df-2 12064 df-3 12065 df-4 12066 df-5 12067 df-6 12068 df-7 12069 df-8 12070 df-9 12071 df-n0 12262 df-z 12348 df-dec 12466 df-uz 12611 df-q 12717 df-rp 12759 df-xneg 12876 df-xadd 12877 df-xmul 12878 df-ioo 13111 df-ioc 13112 df-ico 13113 df-icc 13114 df-fz 13268 df-fzo 13411 df-fl 13540 df-mod 13618 df-seq 13750 df-exp 13811 df-fac 14016 df-bc 14045 df-hash 14073 df-shft 14806 df-cj 14838 df-re 14839 df-im 14840 df-sqrt 14974 df-abs 14975 df-limsup 15208 df-clim 15225 df-rlim 15226 df-sum 15426 df-ef 15805 df-sin 15807 df-cos 15808 df-pi 15810 df-struct 16876 df-sets 16893 df-slot 16911 df-ndx 16923 df-base 16941 df-ress 16970 df-plusg 17003 df-mulr 17004 df-starv 17005 df-sca 17006 df-vsca 17007 df-ip 17008 df-tset 17009 df-ple 17010 df-ds 17012 df-unif 17013 df-hom 17014 df-cco 17015 df-rest 17161 df-topn 17162 df-0g 17180 df-gsum 17181 df-topgen 17182 df-pt 17183 df-prds 17186 df-xrs 17241 df-qtop 17246 df-imas 17247 df-xps 17249 df-mre 17323 df-mrc 17324 df-acs 17326 df-mgm 18354 df-sgrp 18403 df-mnd 18414 df-submnd 18459 df-mulg 18729 df-cntz 18951 df-cmn 19416 df-psmet 20617 df-xmet 20618 df-met 20619 df-bl 20620 df-mopn 20621 df-fbas 20622 df-fg 20623 df-cnfld 20626 df-top 22071 df-topon 22088 df-topsp 22110 df-bases 22124 df-cld 22198 df-ntr 22199 df-cls 22200 df-nei 22277 df-lp 22315 df-perf 22316 df-cn 22406 df-cnp 22407 df-haus 22494 df-cmp 22566 df-tx 22741 df-hmeo 22934 df-fil 23025 df-fm 23117 df-flim 23118 df-flf 23119 df-xms 23501 df-ms 23502 df-tms 23503 df-cncf 24069 df-limc 25058 df-dv 25059 df-log 25740 |
This theorem is referenced by: logcn 25830 logccv 25846 loglesqrt 25939 logdivsqrle 32658 |
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