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| Mirrors > Home > MPE Home > Th. List > dvrelog | Structured version Visualization version GIF version | ||
| Description: The derivative of the real logarithm function. (Contributed by Mario Carneiro, 24-Feb-2015.) |
| Ref | Expression |
|---|---|
| dvrelog | ⊢ (ℝ D (log ↾ ℝ+)) = (𝑥 ∈ ℝ+ ↦ (1 / 𝑥)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfrelog 26607 | . . 3 ⊢ (log ↾ ℝ+) = ◡(exp ↾ ℝ) | |
| 2 | 1 | oveq2i 7442 | . 2 ⊢ (ℝ D (log ↾ ℝ+)) = (ℝ D ◡(exp ↾ ℝ)) |
| 3 | reeff1o 26491 | . . . . . . . . 9 ⊢ (exp ↾ ℝ):ℝ–1-1-onto→ℝ+ | |
| 4 | f1of 6848 | . . . . . . . . 9 ⊢ ((exp ↾ ℝ):ℝ–1-1-onto→ℝ+ → (exp ↾ ℝ):ℝ⟶ℝ+) | |
| 5 | 3, 4 | ax-mp 5 | . . . . . . . 8 ⊢ (exp ↾ ℝ):ℝ⟶ℝ+ |
| 6 | rpssre 13042 | . . . . . . . 8 ⊢ ℝ+ ⊆ ℝ | |
| 7 | fss 6752 | . . . . . . . 8 ⊢ (((exp ↾ ℝ):ℝ⟶ℝ+ ∧ ℝ+ ⊆ ℝ) → (exp ↾ ℝ):ℝ⟶ℝ) | |
| 8 | 5, 6, 7 | mp2an 692 | . . . . . . 7 ⊢ (exp ↾ ℝ):ℝ⟶ℝ |
| 9 | ax-resscn 11212 | . . . . . . . 8 ⊢ ℝ ⊆ ℂ | |
| 10 | efcn 26487 | . . . . . . . . 9 ⊢ exp ∈ (ℂ–cn→ℂ) | |
| 11 | rescncf 24923 | . . . . . . . . 9 ⊢ (ℝ ⊆ ℂ → (exp ∈ (ℂ–cn→ℂ) → (exp ↾ ℝ) ∈ (ℝ–cn→ℂ))) | |
| 12 | 9, 10, 11 | mp2 9 | . . . . . . . 8 ⊢ (exp ↾ ℝ) ∈ (ℝ–cn→ℂ) |
| 13 | cncfcdm 24924 | . . . . . . . 8 ⊢ ((ℝ ⊆ ℂ ∧ (exp ↾ ℝ) ∈ (ℝ–cn→ℂ)) → ((exp ↾ ℝ) ∈ (ℝ–cn→ℝ) ↔ (exp ↾ ℝ):ℝ⟶ℝ)) | |
| 14 | 9, 12, 13 | mp2an 692 | . . . . . . 7 ⊢ ((exp ↾ ℝ) ∈ (ℝ–cn→ℝ) ↔ (exp ↾ ℝ):ℝ⟶ℝ) |
| 15 | 8, 14 | mpbir 231 | . . . . . 6 ⊢ (exp ↾ ℝ) ∈ (ℝ–cn→ℝ) |
| 16 | 15 | a1i 11 | . . . . 5 ⊢ (⊤ → (exp ↾ ℝ) ∈ (ℝ–cn→ℝ)) |
| 17 | reelprrecn 11247 | . . . . . . . . . 10 ⊢ ℝ ∈ {ℝ, ℂ} | |
| 18 | eff 16117 | . . . . . . . . . 10 ⊢ exp:ℂ⟶ℂ | |
| 19 | ssid 4006 | . . . . . . . . . 10 ⊢ ℂ ⊆ ℂ | |
| 20 | dvef 26018 | . . . . . . . . . . . . 13 ⊢ (ℂ D exp) = exp | |
| 21 | 20 | dmeqi 5915 | . . . . . . . . . . . 12 ⊢ dom (ℂ D exp) = dom exp |
| 22 | 18 | fdmi 6747 | . . . . . . . . . . . 12 ⊢ dom exp = ℂ |
| 23 | 21, 22 | eqtri 2765 | . . . . . . . . . . 11 ⊢ dom (ℂ D exp) = ℂ |
| 24 | 9, 23 | sseqtrri 4033 | . . . . . . . . . 10 ⊢ ℝ ⊆ dom (ℂ D exp) |
| 25 | dvres3 25948 | . . . . . . . . . 10 ⊢ (((ℝ ∈ {ℝ, ℂ} ∧ exp:ℂ⟶ℂ) ∧ (ℂ ⊆ ℂ ∧ ℝ ⊆ dom (ℂ D exp))) → (ℝ D (exp ↾ ℝ)) = ((ℂ D exp) ↾ ℝ)) | |
| 26 | 17, 18, 19, 24, 25 | mp4an 693 | . . . . . . . . 9 ⊢ (ℝ D (exp ↾ ℝ)) = ((ℂ D exp) ↾ ℝ) |
| 27 | 20 | reseq1i 5993 | . . . . . . . . 9 ⊢ ((ℂ D exp) ↾ ℝ) = (exp ↾ ℝ) |
| 28 | 26, 27 | eqtri 2765 | . . . . . . . 8 ⊢ (ℝ D (exp ↾ ℝ)) = (exp ↾ ℝ) |
| 29 | 28 | dmeqi 5915 | . . . . . . 7 ⊢ dom (ℝ D (exp ↾ ℝ)) = dom (exp ↾ ℝ) |
| 30 | 5 | fdmi 6747 | . . . . . . 7 ⊢ dom (exp ↾ ℝ) = ℝ |
| 31 | 29, 30 | eqtri 2765 | . . . . . 6 ⊢ dom (ℝ D (exp ↾ ℝ)) = ℝ |
| 32 | 31 | a1i 11 | . . . . 5 ⊢ (⊤ → dom (ℝ D (exp ↾ ℝ)) = ℝ) |
| 33 | 0nrp 13070 | . . . . . . 7 ⊢ ¬ 0 ∈ ℝ+ | |
| 34 | 28 | rneqi 5948 | . . . . . . . . 9 ⊢ ran (ℝ D (exp ↾ ℝ)) = ran (exp ↾ ℝ) |
| 35 | f1ofo 6855 | . . . . . . . . . 10 ⊢ ((exp ↾ ℝ):ℝ–1-1-onto→ℝ+ → (exp ↾ ℝ):ℝ–onto→ℝ+) | |
| 36 | forn 6823 | . . . . . . . . . 10 ⊢ ((exp ↾ ℝ):ℝ–onto→ℝ+ → ran (exp ↾ ℝ) = ℝ+) | |
| 37 | 3, 35, 36 | mp2b 10 | . . . . . . . . 9 ⊢ ran (exp ↾ ℝ) = ℝ+ |
| 38 | 34, 37 | eqtri 2765 | . . . . . . . 8 ⊢ ran (ℝ D (exp ↾ ℝ)) = ℝ+ |
| 39 | 38 | eleq2i 2833 | . . . . . . 7 ⊢ (0 ∈ ran (ℝ D (exp ↾ ℝ)) ↔ 0 ∈ ℝ+) |
| 40 | 33, 39 | mtbir 323 | . . . . . 6 ⊢ ¬ 0 ∈ ran (ℝ D (exp ↾ ℝ)) |
| 41 | 40 | a1i 11 | . . . . 5 ⊢ (⊤ → ¬ 0 ∈ ran (ℝ D (exp ↾ ℝ))) |
| 42 | 3 | a1i 11 | . . . . 5 ⊢ (⊤ → (exp ↾ ℝ):ℝ–1-1-onto→ℝ+) |
| 43 | 16, 32, 41, 42 | dvcnvre 26058 | . . . 4 ⊢ (⊤ → (ℝ D ◡(exp ↾ ℝ)) = (𝑥 ∈ ℝ+ ↦ (1 / ((ℝ D (exp ↾ ℝ))‘(◡(exp ↾ ℝ)‘𝑥))))) |
| 44 | 43 | mptru 1547 | . . 3 ⊢ (ℝ D ◡(exp ↾ ℝ)) = (𝑥 ∈ ℝ+ ↦ (1 / ((ℝ D (exp ↾ ℝ))‘(◡(exp ↾ ℝ)‘𝑥)))) |
| 45 | 28 | fveq1i 6907 | . . . . . 6 ⊢ ((ℝ D (exp ↾ ℝ))‘(◡(exp ↾ ℝ)‘𝑥)) = ((exp ↾ ℝ)‘(◡(exp ↾ ℝ)‘𝑥)) |
| 46 | f1ocnvfv2 7297 | . . . . . . 7 ⊢ (((exp ↾ ℝ):ℝ–1-1-onto→ℝ+ ∧ 𝑥 ∈ ℝ+) → ((exp ↾ ℝ)‘(◡(exp ↾ ℝ)‘𝑥)) = 𝑥) | |
| 47 | 3, 46 | mpan 690 | . . . . . 6 ⊢ (𝑥 ∈ ℝ+ → ((exp ↾ ℝ)‘(◡(exp ↾ ℝ)‘𝑥)) = 𝑥) |
| 48 | 45, 47 | eqtrid 2789 | . . . . 5 ⊢ (𝑥 ∈ ℝ+ → ((ℝ D (exp ↾ ℝ))‘(◡(exp ↾ ℝ)‘𝑥)) = 𝑥) |
| 49 | 48 | oveq2d 7447 | . . . 4 ⊢ (𝑥 ∈ ℝ+ → (1 / ((ℝ D (exp ↾ ℝ))‘(◡(exp ↾ ℝ)‘𝑥))) = (1 / 𝑥)) |
| 50 | 49 | mpteq2ia 5245 | . . 3 ⊢ (𝑥 ∈ ℝ+ ↦ (1 / ((ℝ D (exp ↾ ℝ))‘(◡(exp ↾ ℝ)‘𝑥)))) = (𝑥 ∈ ℝ+ ↦ (1 / 𝑥)) |
| 51 | 44, 50 | eqtri 2765 | . 2 ⊢ (ℝ D ◡(exp ↾ ℝ)) = (𝑥 ∈ ℝ+ ↦ (1 / 𝑥)) |
| 52 | 2, 51 | eqtri 2765 | 1 ⊢ (ℝ D (log ↾ ℝ+)) = (𝑥 ∈ ℝ+ ↦ (1 / 𝑥)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 206 = wceq 1540 ⊤wtru 1541 ∈ wcel 2108 ⊆ wss 3951 {cpr 4628 ↦ cmpt 5225 ◡ccnv 5684 dom cdm 5685 ran crn 5686 ↾ cres 5687 ⟶wf 6557 –onto→wfo 6559 –1-1-onto→wf1o 6560 ‘cfv 6561 (class class class)co 7431 ℂcc 11153 ℝcr 11154 0cc0 11155 1c1 11156 / cdiv 11920 ℝ+crp 13034 expce 16097 –cn→ccncf 24902 D cdv 25898 logclog 26596 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-inf2 9681 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232 ax-pre-sup 11233 ax-addf 11234 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-tp 4631 df-op 4633 df-uni 4908 df-int 4947 df-iun 4993 df-iin 4994 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-se 5638 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-isom 6570 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-of 7697 df-om 7888 df-1st 8014 df-2nd 8015 df-supp 8186 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-1o 8506 df-2o 8507 df-er 8745 df-map 8868 df-pm 8869 df-ixp 8938 df-en 8986 df-dom 8987 df-sdom 8988 df-fin 8989 df-fsupp 9402 df-fi 9451 df-sup 9482 df-inf 9483 df-oi 9550 df-card 9979 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-div 11921 df-nn 12267 df-2 12329 df-3 12330 df-4 12331 df-5 12332 df-6 12333 df-7 12334 df-8 12335 df-9 12336 df-n0 12527 df-z 12614 df-dec 12734 df-uz 12879 df-q 12991 df-rp 13035 df-xneg 13154 df-xadd 13155 df-xmul 13156 df-ioo 13391 df-ioc 13392 df-ico 13393 df-icc 13394 df-fz 13548 df-fzo 13695 df-fl 13832 df-mod 13910 df-seq 14043 df-exp 14103 df-fac 14313 df-bc 14342 df-hash 14370 df-shft 15106 df-cj 15138 df-re 15139 df-im 15140 df-sqrt 15274 df-abs 15275 df-limsup 15507 df-clim 15524 df-rlim 15525 df-sum 15723 df-ef 16103 df-sin 16105 df-cos 16106 df-pi 16108 df-struct 17184 df-sets 17201 df-slot 17219 df-ndx 17231 df-base 17248 df-ress 17275 df-plusg 17310 df-mulr 17311 df-starv 17312 df-sca 17313 df-vsca 17314 df-ip 17315 df-tset 17316 df-ple 17317 df-ds 17319 df-unif 17320 df-hom 17321 df-cco 17322 df-rest 17467 df-topn 17468 df-0g 17486 df-gsum 17487 df-topgen 17488 df-pt 17489 df-prds 17492 df-xrs 17547 df-qtop 17552 df-imas 17553 df-xps 17555 df-mre 17629 df-mrc 17630 df-acs 17632 df-mgm 18653 df-sgrp 18732 df-mnd 18748 df-submnd 18797 df-mulg 19086 df-cntz 19335 df-cmn 19800 df-psmet 21356 df-xmet 21357 df-met 21358 df-bl 21359 df-mopn 21360 df-fbas 21361 df-fg 21362 df-cnfld 21365 df-top 22900 df-topon 22917 df-topsp 22939 df-bases 22953 df-cld 23027 df-ntr 23028 df-cls 23029 df-nei 23106 df-lp 23144 df-perf 23145 df-cn 23235 df-cnp 23236 df-haus 23323 df-cmp 23395 df-tx 23570 df-hmeo 23763 df-fil 23854 df-fm 23946 df-flim 23947 df-flf 23948 df-xms 24330 df-ms 24331 df-tms 24332 df-cncf 24904 df-limc 25901 df-dv 25902 df-log 26598 |
| This theorem is referenced by: relogcn 26680 advlog 26696 advlogexp 26697 logccv 26705 dvcxp1 26782 loglesqrt 26804 logdivsum 27577 log2sumbnd 27588 logdivsqrle 34665 dvrelog2 42065 dvrelog3 42066 |
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