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Mirrors > Home > ILE Home > Th. List > reeff1o | GIF version |
Description: The real exponential function is one-to-one onto. (Contributed by Paul Chapman, 18-Oct-2007.) (Revised by Mario Carneiro, 10-Nov-2013.) |
Ref | Expression |
---|---|
reeff1o | ⊢ (exp ↾ ℝ):ℝ–1-1-onto→ℝ+ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reeff1 11641 | . 2 ⊢ (exp ↾ ℝ):ℝ–1-1→ℝ+ | |
2 | f1f 5393 | . . . 4 ⊢ ((exp ↾ ℝ):ℝ–1-1→ℝ+ → (exp ↾ ℝ):ℝ⟶ℝ+) | |
3 | ffn 5337 | . . . 4 ⊢ ((exp ↾ ℝ):ℝ⟶ℝ+ → (exp ↾ ℝ) Fn ℝ) | |
4 | 1, 2, 3 | mp2b 8 | . . 3 ⊢ (exp ↾ ℝ) Fn ℝ |
5 | frn 5346 | . . . . 5 ⊢ ((exp ↾ ℝ):ℝ⟶ℝ+ → ran (exp ↾ ℝ) ⊆ ℝ+) | |
6 | 1, 2, 5 | mp2b 8 | . . . 4 ⊢ ran (exp ↾ ℝ) ⊆ ℝ+ |
7 | rpre 9596 | . . . . . . . . 9 ⊢ (𝑧 ∈ ℝ+ → 𝑧 ∈ ℝ) | |
8 | reeff1olem 13332 | . . . . . . . . 9 ⊢ ((𝑧 ∈ ℝ ∧ 1 < 𝑧) → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) | |
9 | 7, 8 | sylan 281 | . . . . . . . 8 ⊢ ((𝑧 ∈ ℝ+ ∧ 1 < 𝑧) → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) |
10 | 7 | adantr 274 | . . . . . . . . 9 ⊢ ((𝑧 ∈ ℝ+ ∧ 𝑧 < e) → 𝑧 ∈ ℝ) |
11 | rpgt0 9601 | . . . . . . . . . 10 ⊢ (𝑧 ∈ ℝ+ → 0 < 𝑧) | |
12 | 11 | adantr 274 | . . . . . . . . 9 ⊢ ((𝑧 ∈ ℝ+ ∧ 𝑧 < e) → 0 < 𝑧) |
13 | simpr 109 | . . . . . . . . 9 ⊢ ((𝑧 ∈ ℝ+ ∧ 𝑧 < e) → 𝑧 < e) | |
14 | 0xr 7945 | . . . . . . . . . . 11 ⊢ 0 ∈ ℝ* | |
15 | ere 11611 | . . . . . . . . . . . 12 ⊢ e ∈ ℝ | |
16 | 15 | rexri 7956 | . . . . . . . . . . 11 ⊢ e ∈ ℝ* |
17 | elioo2 9857 | . . . . . . . . . . 11 ⊢ ((0 ∈ ℝ* ∧ e ∈ ℝ*) → (𝑧 ∈ (0(,)e) ↔ (𝑧 ∈ ℝ ∧ 0 < 𝑧 ∧ 𝑧 < e))) | |
18 | 14, 16, 17 | mp2an 423 | . . . . . . . . . 10 ⊢ (𝑧 ∈ (0(,)e) ↔ (𝑧 ∈ ℝ ∧ 0 < 𝑧 ∧ 𝑧 < e)) |
19 | reeff1oleme 13333 | . . . . . . . . . 10 ⊢ (𝑧 ∈ (0(,)e) → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) | |
20 | 18, 19 | sylbir 134 | . . . . . . . . 9 ⊢ ((𝑧 ∈ ℝ ∧ 0 < 𝑧 ∧ 𝑧 < e) → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) |
21 | 10, 12, 13, 20 | syl3anc 1228 | . . . . . . . 8 ⊢ ((𝑧 ∈ ℝ+ ∧ 𝑧 < e) → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) |
22 | 1lt2 9026 | . . . . . . . . . 10 ⊢ 1 < 2 | |
23 | egt2lt3 11720 | . . . . . . . . . . 11 ⊢ (2 < e ∧ e < 3) | |
24 | 23 | simpli 110 | . . . . . . . . . 10 ⊢ 2 < e |
25 | 1re 7898 | . . . . . . . . . . 11 ⊢ 1 ∈ ℝ | |
26 | 2re 8927 | . . . . . . . . . . 11 ⊢ 2 ∈ ℝ | |
27 | 25, 26, 15 | lttri 8003 | . . . . . . . . . 10 ⊢ ((1 < 2 ∧ 2 < e) → 1 < e) |
28 | 22, 24, 27 | mp2an 423 | . . . . . . . . 9 ⊢ 1 < e |
29 | 1red 7914 | . . . . . . . . . 10 ⊢ (𝑧 ∈ ℝ+ → 1 ∈ ℝ) | |
30 | 15 | a1i 9 | . . . . . . . . . 10 ⊢ (𝑧 ∈ ℝ+ → e ∈ ℝ) |
31 | axltwlin 7966 | . . . . . . . . . 10 ⊢ ((1 ∈ ℝ ∧ e ∈ ℝ ∧ 𝑧 ∈ ℝ) → (1 < e → (1 < 𝑧 ∨ 𝑧 < e))) | |
32 | 29, 30, 7, 31 | syl3anc 1228 | . . . . . . . . 9 ⊢ (𝑧 ∈ ℝ+ → (1 < e → (1 < 𝑧 ∨ 𝑧 < e))) |
33 | 28, 32 | mpi 15 | . . . . . . . 8 ⊢ (𝑧 ∈ ℝ+ → (1 < 𝑧 ∨ 𝑧 < e)) |
34 | 9, 21, 33 | mpjaodan 788 | . . . . . . 7 ⊢ (𝑧 ∈ ℝ+ → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) |
35 | fvres 5510 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℝ → ((exp ↾ ℝ)‘𝑥) = (exp‘𝑥)) | |
36 | 35 | eqeq1d 2174 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (((exp ↾ ℝ)‘𝑥) = 𝑧 ↔ (exp‘𝑥) = 𝑧)) |
37 | 36 | rexbiia 2481 | . . . . . . 7 ⊢ (∃𝑥 ∈ ℝ ((exp ↾ ℝ)‘𝑥) = 𝑧 ↔ ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) |
38 | 34, 37 | sylibr 133 | . . . . . 6 ⊢ (𝑧 ∈ ℝ+ → ∃𝑥 ∈ ℝ ((exp ↾ ℝ)‘𝑥) = 𝑧) |
39 | fvelrnb 5534 | . . . . . . 7 ⊢ ((exp ↾ ℝ) Fn ℝ → (𝑧 ∈ ran (exp ↾ ℝ) ↔ ∃𝑥 ∈ ℝ ((exp ↾ ℝ)‘𝑥) = 𝑧)) | |
40 | 4, 39 | ax-mp 5 | . . . . . 6 ⊢ (𝑧 ∈ ran (exp ↾ ℝ) ↔ ∃𝑥 ∈ ℝ ((exp ↾ ℝ)‘𝑥) = 𝑧) |
41 | 38, 40 | sylibr 133 | . . . . 5 ⊢ (𝑧 ∈ ℝ+ → 𝑧 ∈ ran (exp ↾ ℝ)) |
42 | 41 | ssriv 3146 | . . . 4 ⊢ ℝ+ ⊆ ran (exp ↾ ℝ) |
43 | 6, 42 | eqssi 3158 | . . 3 ⊢ ran (exp ↾ ℝ) = ℝ+ |
44 | df-fo 5194 | . . 3 ⊢ ((exp ↾ ℝ):ℝ–onto→ℝ+ ↔ ((exp ↾ ℝ) Fn ℝ ∧ ran (exp ↾ ℝ) = ℝ+)) | |
45 | 4, 43, 44 | mpbir2an 932 | . 2 ⊢ (exp ↾ ℝ):ℝ–onto→ℝ+ |
46 | df-f1o 5195 | . 2 ⊢ ((exp ↾ ℝ):ℝ–1-1-onto→ℝ+ ↔ ((exp ↾ ℝ):ℝ–1-1→ℝ+ ∧ (exp ↾ ℝ):ℝ–onto→ℝ+)) | |
47 | 1, 45, 46 | mpbir2an 932 | 1 ⊢ (exp ↾ ℝ):ℝ–1-1-onto→ℝ+ |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∨ wo 698 ∧ w3a 968 = wceq 1343 ∈ wcel 2136 ∃wrex 2445 ⊆ wss 3116 class class class wbr 3982 ran crn 4605 ↾ cres 4606 Fn wfn 5183 ⟶wf 5184 –1-1→wf1 5185 –onto→wfo 5186 –1-1-onto→wf1o 5187 ‘cfv 5188 (class class class)co 5842 ℝcr 7752 0cc0 7753 1c1 7754 ℝ*cxr 7932 < clt 7933 2c2 8908 3c3 8909 ℝ+crp 9589 (,)cioo 9824 expce 11583 eceu 11584 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 ax-arch 7872 ax-caucvg 7873 ax-pre-suploc 7874 ax-addf 7875 ax-mulf 7876 |
This theorem depends on definitions: df-bi 116 df-stab 821 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-if 3521 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-disj 3960 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-po 4274 df-iso 4275 df-iord 4344 df-on 4346 df-ilim 4347 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-isom 5197 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-of 6050 df-1st 6108 df-2nd 6109 df-recs 6273 df-irdg 6338 df-frec 6359 df-1o 6384 df-oadd 6388 df-er 6501 df-map 6616 df-pm 6617 df-en 6707 df-dom 6708 df-fin 6709 df-sup 6949 df-inf 6950 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-2 8916 df-3 8917 df-4 8918 df-n0 9115 df-z 9192 df-uz 9467 df-q 9558 df-rp 9590 df-xneg 9708 df-xadd 9709 df-ioo 9828 df-ico 9830 df-icc 9831 df-fz 9945 df-fzo 10078 df-seqfrec 10381 df-exp 10455 df-fac 10639 df-bc 10661 df-ihash 10689 df-shft 10757 df-cj 10784 df-re 10785 df-im 10786 df-rsqrt 10940 df-abs 10941 df-clim 11220 df-sumdc 11295 df-ef 11589 df-e 11590 df-rest 12558 df-topgen 12577 df-psmet 12627 df-xmet 12628 df-met 12629 df-bl 12630 df-mopn 12631 df-top 12636 df-topon 12649 df-bases 12681 df-ntr 12736 df-cn 12828 df-cnp 12829 df-tx 12893 df-cncf 13198 df-limced 13265 df-dvap 13266 |
This theorem is referenced by: reefiso 13338 dfrelog 13421 relogf1o 13422 reeflog 13424 |
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