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Mirrors > Home > MPE Home > Th. List > reeff1 | Structured version Visualization version GIF version |
Description: The exponential function maps real arguments one-to-one to positive reals. (Contributed by Steve Rodriguez, 25-Aug-2007.) (Revised by Mario Carneiro, 10-Nov-2013.) |
Ref | Expression |
---|---|
reeff1 | ⊢ (exp ↾ ℝ):ℝ–1-1→ℝ+ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eff 15840 | . . . . 5 ⊢ exp:ℂ⟶ℂ | |
2 | ffn 6630 | . . . . 5 ⊢ (exp:ℂ⟶ℂ → exp Fn ℂ) | |
3 | 1, 2 | ax-mp 5 | . . . 4 ⊢ exp Fn ℂ |
4 | ax-resscn 10978 | . . . 4 ⊢ ℝ ⊆ ℂ | |
5 | fnssres 6586 | . . . 4 ⊢ ((exp Fn ℂ ∧ ℝ ⊆ ℂ) → (exp ↾ ℝ) Fn ℝ) | |
6 | 3, 4, 5 | mp2an 690 | . . 3 ⊢ (exp ↾ ℝ) Fn ℝ |
7 | fvres 6823 | . . . . 5 ⊢ (𝑥 ∈ ℝ → ((exp ↾ ℝ)‘𝑥) = (exp‘𝑥)) | |
8 | rpefcl 15862 | . . . . 5 ⊢ (𝑥 ∈ ℝ → (exp‘𝑥) ∈ ℝ+) | |
9 | 7, 8 | eqeltrd 2837 | . . . 4 ⊢ (𝑥 ∈ ℝ → ((exp ↾ ℝ)‘𝑥) ∈ ℝ+) |
10 | 9 | rgen 3064 | . . 3 ⊢ ∀𝑥 ∈ ℝ ((exp ↾ ℝ)‘𝑥) ∈ ℝ+ |
11 | ffnfv 7024 | . . 3 ⊢ ((exp ↾ ℝ):ℝ⟶ℝ+ ↔ ((exp ↾ ℝ) Fn ℝ ∧ ∀𝑥 ∈ ℝ ((exp ↾ ℝ)‘𝑥) ∈ ℝ+)) | |
12 | 6, 10, 11 | mpbir2an 709 | . 2 ⊢ (exp ↾ ℝ):ℝ⟶ℝ+ |
13 | fvres 6823 | . . . . 5 ⊢ (𝑦 ∈ ℝ → ((exp ↾ ℝ)‘𝑦) = (exp‘𝑦)) | |
14 | 7, 13 | eqeqan12d 2750 | . . . 4 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (((exp ↾ ℝ)‘𝑥) = ((exp ↾ ℝ)‘𝑦) ↔ (exp‘𝑥) = (exp‘𝑦))) |
15 | reef11 15877 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((exp‘𝑥) = (exp‘𝑦) ↔ 𝑥 = 𝑦)) | |
16 | 15 | biimpd 228 | . . . 4 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((exp‘𝑥) = (exp‘𝑦) → 𝑥 = 𝑦)) |
17 | 14, 16 | sylbid 239 | . . 3 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (((exp ↾ ℝ)‘𝑥) = ((exp ↾ ℝ)‘𝑦) → 𝑥 = 𝑦)) |
18 | 17 | rgen2 3191 | . 2 ⊢ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (((exp ↾ ℝ)‘𝑥) = ((exp ↾ ℝ)‘𝑦) → 𝑥 = 𝑦) |
19 | dff13 7160 | . 2 ⊢ ((exp ↾ ℝ):ℝ–1-1→ℝ+ ↔ ((exp ↾ ℝ):ℝ⟶ℝ+ ∧ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (((exp ↾ ℝ)‘𝑥) = ((exp ↾ ℝ)‘𝑦) → 𝑥 = 𝑦))) | |
20 | 12, 18, 19 | mpbir2an 709 | 1 ⊢ (exp ↾ ℝ):ℝ–1-1→ℝ+ |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1539 ∈ wcel 2104 ∀wral 3062 ⊆ wss 3892 ↾ cres 5602 Fn wfn 6453 ⟶wf 6454 –1-1→wf1 6455 ‘cfv 6458 ℂcc 10919 ℝcr 10920 ℝ+crp 12780 expce 15820 |
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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-rep 5218 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-inf2 9447 ax-cnex 10977 ax-resscn 10978 ax-1cn 10979 ax-icn 10980 ax-addcl 10981 ax-addrcl 10982 ax-mulcl 10983 ax-mulrcl 10984 ax-mulcom 10985 ax-addass 10986 ax-mulass 10987 ax-distr 10988 ax-i2m1 10989 ax-1ne0 10990 ax-1rid 10991 ax-rnegex 10992 ax-rrecex 10993 ax-cnre 10994 ax-pre-lttri 10995 ax-pre-lttrn 10996 ax-pre-ltadd 10997 ax-pre-mulgt0 10998 ax-pre-sup 10999 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3304 df-reu 3305 df-rab 3306 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-int 4887 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-se 5556 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-isom 6467 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-1st 7863 df-2nd 7864 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-1o 8328 df-er 8529 df-pm 8649 df-en 8765 df-dom 8766 df-sdom 8767 df-fin 8768 df-sup 9249 df-inf 9250 df-oi 9317 df-card 9745 df-pnf 11061 df-mnf 11062 df-xr 11063 df-ltxr 11064 df-le 11065 df-sub 11257 df-neg 11258 df-div 11683 df-nn 12024 df-2 12086 df-3 12087 df-n0 12284 df-z 12370 df-uz 12633 df-rp 12781 df-ico 13135 df-fz 13290 df-fzo 13433 df-fl 13562 df-seq 13772 df-exp 13833 df-fac 14038 df-bc 14067 df-hash 14095 df-shft 14827 df-cj 14859 df-re 14860 df-im 14861 df-sqrt 14995 df-abs 14996 df-limsup 15229 df-clim 15246 df-rlim 15247 df-sum 15447 df-ef 15826 |
This theorem is referenced by: reeff1o 25655 seff 42140 |
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