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Mirrors > Home > MPE Home > Th. List > eflegeo | Structured version Visualization version GIF version |
Description: The exponential function on the reals between 0 and 1 lies below the comparable geometric series sum. (Contributed by Paul Chapman, 11-Sep-2007.) |
Ref | Expression |
---|---|
eflegeo.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
eflegeo.2 | ⊢ (𝜑 → 0 ≤ 𝐴) |
eflegeo.3 | ⊢ (𝜑 → 𝐴 < 1) |
Ref | Expression |
---|---|
eflegeo | ⊢ (𝜑 → (exp‘𝐴) ≤ (1 / (1 − 𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nn0uz 12441 | . . 3 ⊢ ℕ0 = (ℤ≥‘0) | |
2 | 0zd 12153 | . . 3 ⊢ (𝜑 → 0 ∈ ℤ) | |
3 | eqid 2736 | . . . . 5 ⊢ (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))) = (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))) | |
4 | 3 | eftval 15601 | . . . 4 ⊢ (𝑘 ∈ ℕ0 → ((𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))‘𝑘) = ((𝐴↑𝑘) / (!‘𝑘))) |
5 | 4 | adantl 485 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))‘𝑘) = ((𝐴↑𝑘) / (!‘𝑘))) |
6 | eflegeo.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
7 | reeftcl 15599 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝑘 ∈ ℕ0) → ((𝐴↑𝑘) / (!‘𝑘)) ∈ ℝ) | |
8 | 6, 7 | sylan 583 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐴↑𝑘) / (!‘𝑘)) ∈ ℝ) |
9 | oveq2 7199 | . . . . 5 ⊢ (𝑛 = 𝑘 → (𝐴↑𝑛) = (𝐴↑𝑘)) | |
10 | eqid 2736 | . . . . 5 ⊢ (𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛)) = (𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛)) | |
11 | ovex 7224 | . . . . 5 ⊢ (𝐴↑𝑘) ∈ V | |
12 | 9, 10, 11 | fvmpt 6796 | . . . 4 ⊢ (𝑘 ∈ ℕ0 → ((𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛))‘𝑘) = (𝐴↑𝑘)) |
13 | 12 | adantl 485 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛))‘𝑘) = (𝐴↑𝑘)) |
14 | reexpcl 13617 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝑘 ∈ ℕ0) → (𝐴↑𝑘) ∈ ℝ) | |
15 | 6, 14 | sylan 583 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴↑𝑘) ∈ ℝ) |
16 | faccl 13814 | . . . . . . 7 ⊢ (𝑘 ∈ ℕ0 → (!‘𝑘) ∈ ℕ) | |
17 | 16 | adantl 485 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (!‘𝑘) ∈ ℕ) |
18 | 17 | nnred 11810 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (!‘𝑘) ∈ ℝ) |
19 | 6 | adantr 484 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝐴 ∈ ℝ) |
20 | simpr 488 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑘 ∈ ℕ0) | |
21 | eflegeo.2 | . . . . . . 7 ⊢ (𝜑 → 0 ≤ 𝐴) | |
22 | 21 | adantr 484 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 0 ≤ 𝐴) |
23 | 19, 20, 22 | expge0d 13699 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 0 ≤ (𝐴↑𝑘)) |
24 | 17 | nnge1d 11843 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 1 ≤ (!‘𝑘)) |
25 | 15, 18, 23, 24 | lemulge12d 11735 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴↑𝑘) ≤ ((!‘𝑘) · (𝐴↑𝑘))) |
26 | 17 | nngt0d 11844 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 0 < (!‘𝑘)) |
27 | ledivmul 11673 | . . . . 5 ⊢ (((𝐴↑𝑘) ∈ ℝ ∧ (𝐴↑𝑘) ∈ ℝ ∧ ((!‘𝑘) ∈ ℝ ∧ 0 < (!‘𝑘))) → (((𝐴↑𝑘) / (!‘𝑘)) ≤ (𝐴↑𝑘) ↔ (𝐴↑𝑘) ≤ ((!‘𝑘) · (𝐴↑𝑘)))) | |
28 | 15, 15, 18, 26, 27 | syl112anc 1376 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (((𝐴↑𝑘) / (!‘𝑘)) ≤ (𝐴↑𝑘) ↔ (𝐴↑𝑘) ≤ ((!‘𝑘) · (𝐴↑𝑘)))) |
29 | 25, 28 | mpbird 260 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐴↑𝑘) / (!‘𝑘)) ≤ (𝐴↑𝑘)) |
30 | 6 | recnd 10826 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
31 | 3 | efcllem 15602 | . . . 4 ⊢ (𝐴 ∈ ℂ → seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) ∈ dom ⇝ ) |
32 | 30, 31 | syl 17 | . . 3 ⊢ (𝜑 → seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) ∈ dom ⇝ ) |
33 | 6, 21 | absidd 14951 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) = 𝐴) |
34 | eflegeo.3 | . . . . . 6 ⊢ (𝜑 → 𝐴 < 1) | |
35 | 33, 34 | eqbrtrd 5061 | . . . . 5 ⊢ (𝜑 → (abs‘𝐴) < 1) |
36 | 30, 35, 13 | geolim 15397 | . . . 4 ⊢ (𝜑 → seq0( + , (𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛))) ⇝ (1 / (1 − 𝐴))) |
37 | seqex 13541 | . . . . 5 ⊢ seq0( + , (𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛))) ∈ V | |
38 | ovex 7224 | . . . . 5 ⊢ (1 / (1 − 𝐴)) ∈ V | |
39 | 37, 38 | breldm 5762 | . . . 4 ⊢ (seq0( + , (𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛))) ⇝ (1 / (1 − 𝐴)) → seq0( + , (𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛))) ∈ dom ⇝ ) |
40 | 36, 39 | syl 17 | . . 3 ⊢ (𝜑 → seq0( + , (𝑛 ∈ ℕ0 ↦ (𝐴↑𝑛))) ∈ dom ⇝ ) |
41 | 1, 2, 5, 8, 13, 15, 29, 32, 40 | isumle 15371 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ ℕ0 ((𝐴↑𝑘) / (!‘𝑘)) ≤ Σ𝑘 ∈ ℕ0 (𝐴↑𝑘)) |
42 | efval 15604 | . . 3 ⊢ (𝐴 ∈ ℂ → (exp‘𝐴) = Σ𝑘 ∈ ℕ0 ((𝐴↑𝑘) / (!‘𝑘))) | |
43 | 30, 42 | syl 17 | . 2 ⊢ (𝜑 → (exp‘𝐴) = Σ𝑘 ∈ ℕ0 ((𝐴↑𝑘) / (!‘𝑘))) |
44 | expcl 13618 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ0) → (𝐴↑𝑘) ∈ ℂ) | |
45 | 30, 44 | sylan 583 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴↑𝑘) ∈ ℂ) |
46 | 1, 2, 13, 45, 36 | isumclim 15284 | . . 3 ⊢ (𝜑 → Σ𝑘 ∈ ℕ0 (𝐴↑𝑘) = (1 / (1 − 𝐴))) |
47 | 46 | eqcomd 2742 | . 2 ⊢ (𝜑 → (1 / (1 − 𝐴)) = Σ𝑘 ∈ ℕ0 (𝐴↑𝑘)) |
48 | 41, 43, 47 | 3brtr4d 5071 | 1 ⊢ (𝜑 → (exp‘𝐴) ≤ (1 / (1 − 𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1543 ∈ wcel 2112 class class class wbr 5039 ↦ cmpt 5120 dom cdm 5536 ‘cfv 6358 (class class class)co 7191 ℂcc 10692 ℝcr 10693 0cc0 10694 1c1 10695 + caddc 10697 · cmul 10699 < clt 10832 ≤ cle 10833 − cmin 11027 / cdiv 11454 ℕcn 11795 ℕ0cn0 12055 seqcseq 13539 ↑cexp 13600 !cfa 13804 abscabs 14762 ⇝ cli 15010 Σcsu 15214 expce 15586 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-rep 5164 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-inf2 9234 ax-cnex 10750 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 ax-pre-sup 10772 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-int 4846 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-se 5495 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-isom 6367 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-om 7623 df-1st 7739 df-2nd 7740 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-1o 8180 df-er 8369 df-pm 8489 df-en 8605 df-dom 8606 df-sdom 8607 df-fin 8608 df-sup 9036 df-inf 9037 df-oi 9104 df-card 9520 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-div 11455 df-nn 11796 df-2 11858 df-3 11859 df-n0 12056 df-z 12142 df-uz 12404 df-rp 12552 df-ico 12906 df-fz 13061 df-fzo 13204 df-fl 13332 df-seq 13540 df-exp 13601 df-fac 13805 df-hash 13862 df-shft 14595 df-cj 14627 df-re 14628 df-im 14629 df-sqrt 14763 df-abs 14764 df-limsup 14997 df-clim 15014 df-rlim 15015 df-sum 15215 df-ef 15592 |
This theorem is referenced by: birthdaylem3 25790 logdiflbnd 25831 emcllem2 25833 |
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