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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 11663 | . 2 ⊢ (exp ↾ ℝ):ℝ–1-1→ℝ+ | |
2 | f1f 5403 | . . . 4 ⊢ ((exp ↾ ℝ):ℝ–1-1→ℝ+ → (exp ↾ ℝ):ℝ⟶ℝ+) | |
3 | ffn 5347 | . . . 4 ⊢ ((exp ↾ ℝ):ℝ⟶ℝ+ → (exp ↾ ℝ) Fn ℝ) | |
4 | 1, 2, 3 | mp2b 8 | . . 3 ⊢ (exp ↾ ℝ) Fn ℝ |
5 | frn 5356 | . . . . 5 ⊢ ((exp ↾ ℝ):ℝ⟶ℝ+ → ran (exp ↾ ℝ) ⊆ ℝ+) | |
6 | 1, 2, 5 | mp2b 8 | . . . 4 ⊢ ran (exp ↾ ℝ) ⊆ ℝ+ |
7 | rpre 9617 | . . . . . . . . 9 ⊢ (𝑧 ∈ ℝ+ → 𝑧 ∈ ℝ) | |
8 | reeff1olem 13486 | . . . . . . . . 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 9622 | . . . . . . . . . 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 7966 | . . . . . . . . . . 11 ⊢ 0 ∈ ℝ* | |
15 | ere 11633 | . . . . . . . . . . . 12 ⊢ e ∈ ℝ | |
16 | 15 | rexri 7977 | . . . . . . . . . . 11 ⊢ e ∈ ℝ* |
17 | elioo2 9878 | . . . . . . . . . . 11 ⊢ ((0 ∈ ℝ* ∧ e ∈ ℝ*) → (𝑧 ∈ (0(,)e) ↔ (𝑧 ∈ ℝ ∧ 0 < 𝑧 ∧ 𝑧 < e))) | |
18 | 14, 16, 17 | mp2an 424 | . . . . . . . . . 10 ⊢ (𝑧 ∈ (0(,)e) ↔ (𝑧 ∈ ℝ ∧ 0 < 𝑧 ∧ 𝑧 < e)) |
19 | reeff1oleme 13487 | . . . . . . . . . 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 1233 | . . . . . . . 8 ⊢ ((𝑧 ∈ ℝ+ ∧ 𝑧 < e) → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) |
22 | 1lt2 9047 | . . . . . . . . . 10 ⊢ 1 < 2 | |
23 | egt2lt3 11742 | . . . . . . . . . . 11 ⊢ (2 < e ∧ e < 3) | |
24 | 23 | simpli 110 | . . . . . . . . . 10 ⊢ 2 < e |
25 | 1re 7919 | . . . . . . . . . . 11 ⊢ 1 ∈ ℝ | |
26 | 2re 8948 | . . . . . . . . . . 11 ⊢ 2 ∈ ℝ | |
27 | 25, 26, 15 | lttri 8024 | . . . . . . . . . 10 ⊢ ((1 < 2 ∧ 2 < e) → 1 < e) |
28 | 22, 24, 27 | mp2an 424 | . . . . . . . . 9 ⊢ 1 < e |
29 | 1red 7935 | . . . . . . . . . 10 ⊢ (𝑧 ∈ ℝ+ → 1 ∈ ℝ) | |
30 | 15 | a1i 9 | . . . . . . . . . 10 ⊢ (𝑧 ∈ ℝ+ → e ∈ ℝ) |
31 | axltwlin 7987 | . . . . . . . . . 10 ⊢ ((1 ∈ ℝ ∧ e ∈ ℝ ∧ 𝑧 ∈ ℝ) → (1 < e → (1 < 𝑧 ∨ 𝑧 < e))) | |
32 | 29, 30, 7, 31 | syl3anc 1233 | . . . . . . . . 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 793 | . . . . . . 7 ⊢ (𝑧 ∈ ℝ+ → ∃𝑥 ∈ ℝ (exp‘𝑥) = 𝑧) |
35 | fvres 5520 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℝ → ((exp ↾ ℝ)‘𝑥) = (exp‘𝑥)) | |
36 | 35 | eqeq1d 2179 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (((exp ↾ ℝ)‘𝑥) = 𝑧 ↔ (exp‘𝑥) = 𝑧)) |
37 | 36 | rexbiia 2485 | . . . . . . 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 5544 | . . . . . . 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 3151 | . . . 4 ⊢ ℝ+ ⊆ ran (exp ↾ ℝ) |
43 | 6, 42 | eqssi 3163 | . . 3 ⊢ ran (exp ↾ ℝ) = ℝ+ |
44 | df-fo 5204 | . . 3 ⊢ ((exp ↾ ℝ):ℝ–onto→ℝ+ ↔ ((exp ↾ ℝ) Fn ℝ ∧ ran (exp ↾ ℝ) = ℝ+)) | |
45 | 4, 43, 44 | mpbir2an 937 | . 2 ⊢ (exp ↾ ℝ):ℝ–onto→ℝ+ |
46 | df-f1o 5205 | . 2 ⊢ ((exp ↾ ℝ):ℝ–1-1-onto→ℝ+ ↔ ((exp ↾ ℝ):ℝ–1-1→ℝ+ ∧ (exp ↾ ℝ):ℝ–onto→ℝ+)) | |
47 | 1, 45, 46 | mpbir2an 937 | 1 ⊢ (exp ↾ ℝ):ℝ–1-1-onto→ℝ+ |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∨ wo 703 ∧ w3a 973 = wceq 1348 ∈ wcel 2141 ∃wrex 2449 ⊆ wss 3121 class class class wbr 3989 ran crn 4612 ↾ cres 4613 Fn wfn 5193 ⟶wf 5194 –1-1→wf1 5195 –onto→wfo 5196 –1-1-onto→wf1o 5197 ‘cfv 5198 (class class class)co 5853 ℝcr 7773 0cc0 7774 1c1 7775 ℝ*cxr 7953 < clt 7954 2c2 8929 3c3 8930 ℝ+crp 9610 (,)cioo 9845 expce 11605 eceu 11606 |
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 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4104 ax-sep 4107 ax-nul 4115 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-iinf 4572 ax-cnex 7865 ax-resscn 7866 ax-1cn 7867 ax-1re 7868 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-mulrcl 7873 ax-addcom 7874 ax-mulcom 7875 ax-addass 7876 ax-mulass 7877 ax-distr 7878 ax-i2m1 7879 ax-0lt1 7880 ax-1rid 7881 ax-0id 7882 ax-rnegex 7883 ax-precex 7884 ax-cnre 7885 ax-pre-ltirr 7886 ax-pre-ltwlin 7887 ax-pre-lttrn 7888 ax-pre-apti 7889 ax-pre-ltadd 7890 ax-pre-mulgt0 7891 ax-pre-mulext 7892 ax-arch 7893 ax-caucvg 7894 ax-pre-suploc 7895 ax-addf 7896 ax-mulf 7897 |
This theorem depends on definitions: df-bi 116 df-stab 826 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-if 3527 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-int 3832 df-iun 3875 df-disj 3967 df-br 3990 df-opab 4051 df-mpt 4052 df-tr 4088 df-id 4278 df-po 4281 df-iso 4282 df-iord 4351 df-on 4353 df-ilim 4354 df-suc 4356 df-iom 4575 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 df-fv 5206 df-isom 5207 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-of 6061 df-1st 6119 df-2nd 6120 df-recs 6284 df-irdg 6349 df-frec 6370 df-1o 6395 df-oadd 6399 df-er 6513 df-map 6628 df-pm 6629 df-en 6719 df-dom 6720 df-fin 6721 df-sup 6961 df-inf 6962 df-pnf 7956 df-mnf 7957 df-xr 7958 df-ltxr 7959 df-le 7960 df-sub 8092 df-neg 8093 df-reap 8494 df-ap 8501 df-div 8590 df-inn 8879 df-2 8937 df-3 8938 df-4 8939 df-n0 9136 df-z 9213 df-uz 9488 df-q 9579 df-rp 9611 df-xneg 9729 df-xadd 9730 df-ioo 9849 df-ico 9851 df-icc 9852 df-fz 9966 df-fzo 10099 df-seqfrec 10402 df-exp 10476 df-fac 10660 df-bc 10682 df-ihash 10710 df-shft 10779 df-cj 10806 df-re 10807 df-im 10808 df-rsqrt 10962 df-abs 10963 df-clim 11242 df-sumdc 11317 df-ef 11611 df-e 11612 df-rest 12581 df-topgen 12600 df-psmet 12781 df-xmet 12782 df-met 12783 df-bl 12784 df-mopn 12785 df-top 12790 df-topon 12803 df-bases 12835 df-ntr 12890 df-cn 12982 df-cnp 12983 df-tx 13047 df-cncf 13352 df-limced 13419 df-dvap 13420 |
This theorem is referenced by: reefiso 13492 dfrelog 13575 relogf1o 13576 reeflog 13578 |
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