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Mirrors > Home > MPE Home > Th. List > reefgim | Structured version Visualization version GIF version |
Description: The exponential function is a group isomorphism from the group of reals under addition to the group of positive reals under multiplication. (Contributed by Mario Carneiro, 21-Jun-2015.) (Revised by Thierry Arnoux, 30-Jun-2019.) |
Ref | Expression |
---|---|
reefgim.1 | ⊢ 𝑃 = ((mulGrp‘ℂfld) ↾s ℝ+) |
Ref | Expression |
---|---|
reefgim | ⊢ (exp ↾ ℝ) ∈ (ℝfld GrpIso 𝑃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rebase 20811 | . . . 4 ⊢ ℝ = (Base‘ℝfld) | |
2 | eqid 2738 | . . . . . 6 ⊢ ((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) = ((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) | |
3 | 2 | rpmsubg 20662 | . . . . 5 ⊢ ℝ+ ∈ (SubGrp‘((mulGrp‘ℂfld) ↾s (ℂ ∖ {0}))) |
4 | reefgim.1 | . . . . . . 7 ⊢ 𝑃 = ((mulGrp‘ℂfld) ↾s ℝ+) | |
5 | cnex 10952 | . . . . . . . . 9 ⊢ ℂ ∈ V | |
6 | 5 | difexi 5252 | . . . . . . . 8 ⊢ (ℂ ∖ {0}) ∈ V |
7 | rpcndif0 12749 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℝ+ → 𝑥 ∈ (ℂ ∖ {0})) | |
8 | 7 | ssriv 3925 | . . . . . . . 8 ⊢ ℝ+ ⊆ (ℂ ∖ {0}) |
9 | ressabs 16959 | . . . . . . . 8 ⊢ (((ℂ ∖ {0}) ∈ V ∧ ℝ+ ⊆ (ℂ ∖ {0})) → (((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) ↾s ℝ+) = ((mulGrp‘ℂfld) ↾s ℝ+)) | |
10 | 6, 8, 9 | mp2an 689 | . . . . . . 7 ⊢ (((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) ↾s ℝ+) = ((mulGrp‘ℂfld) ↾s ℝ+) |
11 | 4, 10 | eqtr4i 2769 | . . . . . 6 ⊢ 𝑃 = (((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) ↾s ℝ+) |
12 | 11 | subgbas 18759 | . . . . 5 ⊢ (ℝ+ ∈ (SubGrp‘((mulGrp‘ℂfld) ↾s (ℂ ∖ {0}))) → ℝ+ = (Base‘𝑃)) |
13 | 3, 12 | ax-mp 5 | . . . 4 ⊢ ℝ+ = (Base‘𝑃) |
14 | replusg 20815 | . . . 4 ⊢ + = (+g‘ℝfld) | |
15 | eqid 2738 | . . . . . . 7 ⊢ (mulGrp‘ℂfld) = (mulGrp‘ℂfld) | |
16 | cnfldmul 20603 | . . . . . . 7 ⊢ · = (.r‘ℂfld) | |
17 | 15, 16 | mgpplusg 19724 | . . . . . 6 ⊢ · = (+g‘(mulGrp‘ℂfld)) |
18 | 4, 17 | ressplusg 17000 | . . . . 5 ⊢ (ℝ+ ∈ (SubGrp‘((mulGrp‘ℂfld) ↾s (ℂ ∖ {0}))) → · = (+g‘𝑃)) |
19 | 3, 18 | ax-mp 5 | . . . 4 ⊢ · = (+g‘𝑃) |
20 | resubdrg 20813 | . . . . . . 7 ⊢ (ℝ ∈ (SubRing‘ℂfld) ∧ ℝfld ∈ DivRing) | |
21 | 20 | simpli 484 | . . . . . 6 ⊢ ℝ ∈ (SubRing‘ℂfld) |
22 | df-refld 20810 | . . . . . . 7 ⊢ ℝfld = (ℂfld ↾s ℝ) | |
23 | 22 | subrgring 20027 | . . . . . 6 ⊢ (ℝ ∈ (SubRing‘ℂfld) → ℝfld ∈ Ring) |
24 | 21, 23 | ax-mp 5 | . . . . 5 ⊢ ℝfld ∈ Ring |
25 | ringgrp 19788 | . . . . 5 ⊢ (ℝfld ∈ Ring → ℝfld ∈ Grp) | |
26 | 24, 25 | mp1i 13 | . . . 4 ⊢ (⊤ → ℝfld ∈ Grp) |
27 | 11 | subggrp 18758 | . . . . 5 ⊢ (ℝ+ ∈ (SubGrp‘((mulGrp‘ℂfld) ↾s (ℂ ∖ {0}))) → 𝑃 ∈ Grp) |
28 | 3, 27 | mp1i 13 | . . . 4 ⊢ (⊤ → 𝑃 ∈ Grp) |
29 | reeff1o 25606 | . . . . 5 ⊢ (exp ↾ ℝ):ℝ–1-1-onto→ℝ+ | |
30 | f1of 6716 | . . . . 5 ⊢ ((exp ↾ ℝ):ℝ–1-1-onto→ℝ+ → (exp ↾ ℝ):ℝ⟶ℝ+) | |
31 | 29, 30 | mp1i 13 | . . . 4 ⊢ (⊤ → (exp ↾ ℝ):ℝ⟶ℝ+) |
32 | recn 10961 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℂ) | |
33 | recn 10961 | . . . . . . 7 ⊢ (𝑦 ∈ ℝ → 𝑦 ∈ ℂ) | |
34 | efadd 15803 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (exp‘(𝑥 + 𝑦)) = ((exp‘𝑥) · (exp‘𝑦))) | |
35 | 32, 33, 34 | syl2an 596 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (exp‘(𝑥 + 𝑦)) = ((exp‘𝑥) · (exp‘𝑦))) |
36 | readdcl 10954 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 + 𝑦) ∈ ℝ) | |
37 | 36 | fvresd 6794 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((exp ↾ ℝ)‘(𝑥 + 𝑦)) = (exp‘(𝑥 + 𝑦))) |
38 | fvres 6793 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → ((exp ↾ ℝ)‘𝑥) = (exp‘𝑥)) | |
39 | fvres 6793 | . . . . . . 7 ⊢ (𝑦 ∈ ℝ → ((exp ↾ ℝ)‘𝑦) = (exp‘𝑦)) | |
40 | 38, 39 | oveqan12d 7294 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (((exp ↾ ℝ)‘𝑥) · ((exp ↾ ℝ)‘𝑦)) = ((exp‘𝑥) · (exp‘𝑦))) |
41 | 35, 37, 40 | 3eqtr4d 2788 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((exp ↾ ℝ)‘(𝑥 + 𝑦)) = (((exp ↾ ℝ)‘𝑥) · ((exp ↾ ℝ)‘𝑦))) |
42 | 41 | adantl 482 | . . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → ((exp ↾ ℝ)‘(𝑥 + 𝑦)) = (((exp ↾ ℝ)‘𝑥) · ((exp ↾ ℝ)‘𝑦))) |
43 | 1, 13, 14, 19, 26, 28, 31, 42 | isghmd 18843 | . . 3 ⊢ (⊤ → (exp ↾ ℝ) ∈ (ℝfld GrpHom 𝑃)) |
44 | 43 | mptru 1546 | . 2 ⊢ (exp ↾ ℝ) ∈ (ℝfld GrpHom 𝑃) |
45 | 1, 13 | isgim 18878 | . 2 ⊢ ((exp ↾ ℝ) ∈ (ℝfld GrpIso 𝑃) ↔ ((exp ↾ ℝ) ∈ (ℝfld GrpHom 𝑃) ∧ (exp ↾ ℝ):ℝ–1-1-onto→ℝ+)) |
46 | 44, 29, 45 | mpbir2an 708 | 1 ⊢ (exp ↾ ℝ) ∈ (ℝfld GrpIso 𝑃) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 396 = wceq 1539 ⊤wtru 1540 ∈ wcel 2106 Vcvv 3432 ∖ cdif 3884 ⊆ wss 3887 {csn 4561 ↾ cres 5591 ⟶wf 6429 –1-1-onto→wf1o 6432 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 ℝcr 10870 0cc0 10871 + caddc 10874 · cmul 10876 ℝ+crp 12730 expce 15771 Basecbs 16912 ↾s cress 16941 +gcplusg 16962 Grpcgrp 18577 SubGrpcsubg 18749 GrpHom cghm 18831 GrpIso cgim 18873 mulGrpcmgp 19720 Ringcrg 19783 DivRingcdr 19991 SubRingcsubrg 20020 ℂfldccnfld 20597 ℝfldcrefld 20809 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 ax-addf 10950 ax-mulf 10951 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-iin 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-of 7533 df-om 7713 df-1st 7831 df-2nd 7832 df-supp 7978 df-tpos 8042 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-2o 8298 df-er 8498 df-map 8617 df-pm 8618 df-ixp 8686 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-fsupp 9129 df-fi 9170 df-sup 9201 df-inf 9202 df-oi 9269 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-4 12038 df-5 12039 df-6 12040 df-7 12041 df-8 12042 df-9 12043 df-n0 12234 df-z 12320 df-dec 12438 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-ioo 13083 df-ico 13085 df-icc 13086 df-fz 13240 df-fzo 13383 df-fl 13512 df-seq 13722 df-exp 13783 df-fac 13988 df-bc 14017 df-hash 14045 df-shft 14778 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-limsup 15180 df-clim 15197 df-rlim 15198 df-sum 15398 df-ef 15777 df-struct 16848 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-starv 16977 df-sca 16978 df-vsca 16979 df-ip 16980 df-tset 16981 df-ple 16982 df-ds 16984 df-unif 16985 df-hom 16986 df-cco 16987 df-rest 17133 df-topn 17134 df-0g 17152 df-gsum 17153 df-topgen 17154 df-pt 17155 df-prds 17158 df-xrs 17213 df-qtop 17218 df-imas 17219 df-xps 17221 df-mre 17295 df-mrc 17296 df-acs 17298 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-submnd 18431 df-grp 18580 df-minusg 18581 df-mulg 18701 df-subg 18752 df-ghm 18832 df-gim 18875 df-cntz 18923 df-cmn 19388 df-abl 19389 df-mgp 19721 df-ur 19738 df-ring 19785 df-cring 19786 df-oppr 19862 df-dvdsr 19883 df-unit 19884 df-invr 19914 df-dvr 19925 df-drng 19993 df-subrg 20022 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-fbas 20594 df-fg 20595 df-cnfld 20598 df-refld 20810 df-top 22043 df-topon 22060 df-topsp 22082 df-bases 22096 df-cld 22170 df-ntr 22171 df-cls 22172 df-nei 22249 df-lp 22287 df-perf 22288 df-cn 22378 df-cnp 22379 df-haus 22466 df-tx 22713 df-hmeo 22906 df-fil 22997 df-fm 23089 df-flim 23090 df-flf 23091 df-xms 23473 df-ms 23474 df-tms 23475 df-cncf 24041 df-limc 25030 df-dv 25031 |
This theorem is referenced by: reloggim 25754 |
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