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Mirrors > Home > MPE Home > Th. List > efcvgfsum | Structured version Visualization version GIF version |
Description: Exponential function convergence in terms of a sequence of partial finite sums. (Contributed by NM, 10-Jan-2006.) (Revised by Mario Carneiro, 28-Apr-2014.) |
Ref | Expression |
---|---|
efcvgfsum.1 | ⊢ 𝐹 = (𝑛 ∈ ℕ0 ↦ Σ𝑘 ∈ (0...𝑛)((𝐴↑𝑘) / (!‘𝑘))) |
Ref | Expression |
---|---|
efcvgfsum | ⊢ (𝐴 ∈ ℂ → 𝐹 ⇝ (exp‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq2 7366 | . . . . . . . 8 ⊢ (𝑛 = 𝑗 → (0...𝑛) = (0...𝑗)) | |
2 | 1 | sumeq1d 15591 | . . . . . . 7 ⊢ (𝑛 = 𝑗 → Σ𝑘 ∈ (0...𝑛)((𝐴↑𝑘) / (!‘𝑘)) = Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘))) |
3 | efcvgfsum.1 | . . . . . . 7 ⊢ 𝐹 = (𝑛 ∈ ℕ0 ↦ Σ𝑘 ∈ (0...𝑛)((𝐴↑𝑘) / (!‘𝑘))) | |
4 | sumex 15578 | . . . . . . 7 ⊢ Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘)) ∈ V | |
5 | 2, 3, 4 | fvmpt 6949 | . . . . . 6 ⊢ (𝑗 ∈ ℕ0 → (𝐹‘𝑗) = Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘))) |
6 | 5 | adantl 483 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → (𝐹‘𝑗) = Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘))) |
7 | elfznn0 13540 | . . . . . . . 8 ⊢ (𝑘 ∈ (0...𝑗) → 𝑘 ∈ ℕ0) | |
8 | 7 | adantl 483 | . . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) ∧ 𝑘 ∈ (0...𝑗)) → 𝑘 ∈ ℕ0) |
9 | eqid 2733 | . . . . . . . 8 ⊢ (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))) = (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))) | |
10 | 9 | eftval 15964 | . . . . . . 7 ⊢ (𝑘 ∈ ℕ0 → ((𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))‘𝑘) = ((𝐴↑𝑘) / (!‘𝑘))) |
11 | 8, 10 | syl 17 | . . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) ∧ 𝑘 ∈ (0...𝑗)) → ((𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))‘𝑘) = ((𝐴↑𝑘) / (!‘𝑘))) |
12 | simpr 486 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → 𝑗 ∈ ℕ0) | |
13 | nn0uz 12810 | . . . . . . 7 ⊢ ℕ0 = (ℤ≥‘0) | |
14 | 12, 13 | eleqtrdi 2844 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → 𝑗 ∈ (ℤ≥‘0)) |
15 | simpll 766 | . . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) ∧ 𝑘 ∈ (0...𝑗)) → 𝐴 ∈ ℂ) | |
16 | eftcl 15961 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ0) → ((𝐴↑𝑘) / (!‘𝑘)) ∈ ℂ) | |
17 | 15, 8, 16 | syl2anc 585 | . . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) ∧ 𝑘 ∈ (0...𝑗)) → ((𝐴↑𝑘) / (!‘𝑘)) ∈ ℂ) |
18 | 11, 14, 17 | fsumser 15620 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘)) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗)) |
19 | 6, 18 | eqtrd 2773 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → (𝐹‘𝑗) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗)) |
20 | 19 | ralrimiva 3140 | . . 3 ⊢ (𝐴 ∈ ℂ → ∀𝑗 ∈ ℕ0 (𝐹‘𝑗) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗)) |
21 | sumex 15578 | . . . . 5 ⊢ Σ𝑘 ∈ (0...𝑛)((𝐴↑𝑘) / (!‘𝑘)) ∈ V | |
22 | 21, 3 | fnmpti 6645 | . . . 4 ⊢ 𝐹 Fn ℕ0 |
23 | 0z 12515 | . . . . . 6 ⊢ 0 ∈ ℤ | |
24 | seqfn 13924 | . . . . . 6 ⊢ (0 ∈ ℤ → seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) Fn (ℤ≥‘0)) | |
25 | 23, 24 | ax-mp 5 | . . . . 5 ⊢ seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) Fn (ℤ≥‘0) |
26 | 13 | fneq2i 6601 | . . . . 5 ⊢ (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) Fn ℕ0 ↔ seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) Fn (ℤ≥‘0)) |
27 | 25, 26 | mpbir 230 | . . . 4 ⊢ seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) Fn ℕ0 |
28 | eqfnfv 6983 | . . . 4 ⊢ ((𝐹 Fn ℕ0 ∧ seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) Fn ℕ0) → (𝐹 = seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) ↔ ∀𝑗 ∈ ℕ0 (𝐹‘𝑗) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗))) | |
29 | 22, 27, 28 | mp2an 691 | . . 3 ⊢ (𝐹 = seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) ↔ ∀𝑗 ∈ ℕ0 (𝐹‘𝑗) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗)) |
30 | 20, 29 | sylibr 233 | . 2 ⊢ (𝐴 ∈ ℂ → 𝐹 = seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))) |
31 | 9 | efcvg 15972 | . 2 ⊢ (𝐴 ∈ ℂ → seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) ⇝ (exp‘𝐴)) |
32 | 30, 31 | eqbrtrd 5128 | 1 ⊢ (𝐴 ∈ ℂ → 𝐹 ⇝ (exp‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ∀wral 3061 class class class wbr 5106 ↦ cmpt 5189 Fn wfn 6492 ‘cfv 6497 (class class class)co 7358 ℂcc 11054 0cc0 11056 + caddc 11059 / cdiv 11817 ℕ0cn0 12418 ℤcz 12504 ℤ≥cuz 12768 ...cfz 13430 seqcseq 13912 ↑cexp 13973 !cfa 14179 ⇝ cli 15372 Σcsu 15576 expce 15949 |
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 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5243 ax-sep 5257 ax-nul 5264 ax-pow 5321 ax-pr 5385 ax-un 7673 ax-inf2 9582 ax-cnex 11112 ax-resscn 11113 ax-1cn 11114 ax-icn 11115 ax-addcl 11116 ax-addrcl 11117 ax-mulcl 11118 ax-mulrcl 11119 ax-mulcom 11120 ax-addass 11121 ax-mulass 11122 ax-distr 11123 ax-i2m1 11124 ax-1ne0 11125 ax-1rid 11126 ax-rnegex 11127 ax-rrecex 11128 ax-cnre 11129 ax-pre-lttri 11130 ax-pre-lttrn 11131 ax-pre-ltadd 11132 ax-pre-mulgt0 11133 ax-pre-sup 11134 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3352 df-reu 3353 df-rab 3407 df-v 3446 df-sbc 3741 df-csb 3857 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3930 df-nul 4284 df-if 4488 df-pw 4563 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4867 df-int 4909 df-iun 4957 df-br 5107 df-opab 5169 df-mpt 5190 df-tr 5224 df-id 5532 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5589 df-se 5590 df-we 5591 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6254 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6499 df-fn 6500 df-f 6501 df-f1 6502 df-fo 6503 df-f1o 6504 df-fv 6505 df-isom 6506 df-riota 7314 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7804 df-1st 7922 df-2nd 7923 df-frecs 8213 df-wrecs 8244 df-recs 8318 df-rdg 8357 df-1o 8413 df-er 8651 df-pm 8771 df-en 8887 df-dom 8888 df-sdom 8889 df-fin 8890 df-sup 9383 df-inf 9384 df-oi 9451 df-card 9880 df-pnf 11196 df-mnf 11197 df-xr 11198 df-ltxr 11199 df-le 11200 df-sub 11392 df-neg 11393 df-div 11818 df-nn 12159 df-2 12221 df-3 12222 df-n0 12419 df-z 12505 df-uz 12769 df-rp 12921 df-ico 13276 df-fz 13431 df-fzo 13574 df-fl 13703 df-seq 13913 df-exp 13974 df-fac 14180 df-hash 14237 df-shft 14958 df-cj 14990 df-re 14991 df-im 14992 df-sqrt 15126 df-abs 15127 df-limsup 15359 df-clim 15376 df-rlim 15377 df-sum 15577 df-ef 15955 |
This theorem is referenced by: (None) |
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