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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 7422 | . . . . . . . 8 ⊢ (𝑛 = 𝑗 → (0...𝑛) = (0...𝑗)) | |
2 | 1 | sumeq1d 15671 | . . . . . . 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 15658 | . . . . . . 7 ⊢ Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘)) ∈ V | |
5 | 2, 3, 4 | fvmpt 6999 | . . . . . 6 ⊢ (𝑗 ∈ ℕ0 → (𝐹‘𝑗) = Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘))) |
6 | 5 | adantl 481 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → (𝐹‘𝑗) = Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘))) |
7 | elfznn0 13618 | . . . . . . . 8 ⊢ (𝑘 ∈ (0...𝑗) → 𝑘 ∈ ℕ0) | |
8 | 7 | adantl 481 | . . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) ∧ 𝑘 ∈ (0...𝑗)) → 𝑘 ∈ ℕ0) |
9 | eqid 2727 | . . . . . . . 8 ⊢ (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))) = (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))) | |
10 | 9 | eftval 16044 | . . . . . . 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 484 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → 𝑗 ∈ ℕ0) | |
13 | nn0uz 12886 | . . . . . . 7 ⊢ ℕ0 = (ℤ≥‘0) | |
14 | 12, 13 | eleqtrdi 2838 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → 𝑗 ∈ (ℤ≥‘0)) |
15 | simpll 766 | . . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) ∧ 𝑘 ∈ (0...𝑗)) → 𝐴 ∈ ℂ) | |
16 | eftcl 16041 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑘 ∈ ℕ0) → ((𝐴↑𝑘) / (!‘𝑘)) ∈ ℂ) | |
17 | 15, 8, 16 | syl2anc 583 | . . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) ∧ 𝑘 ∈ (0...𝑗)) → ((𝐴↑𝑘) / (!‘𝑘)) ∈ ℂ) |
18 | 11, 14, 17 | fsumser 15700 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → Σ𝑘 ∈ (0...𝑗)((𝐴↑𝑘) / (!‘𝑘)) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗)) |
19 | 6, 18 | eqtrd 2767 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑗 ∈ ℕ0) → (𝐹‘𝑗) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗)) |
20 | 19 | ralrimiva 3141 | . . 3 ⊢ (𝐴 ∈ ℂ → ∀𝑗 ∈ ℕ0 (𝐹‘𝑗) = (seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛))))‘𝑗)) |
21 | sumex 15658 | . . . . 5 ⊢ Σ𝑘 ∈ (0...𝑛)((𝐴↑𝑘) / (!‘𝑘)) ∈ V | |
22 | 21, 3 | fnmpti 6692 | . . . 4 ⊢ 𝐹 Fn ℕ0 |
23 | 0z 12591 | . . . . . 6 ⊢ 0 ∈ ℤ | |
24 | seqfn 14002 | . . . . . 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 6646 | . . . . 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 7034 | . . . 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 16053 | . 2 ⊢ (𝐴 ∈ ℂ → seq0( + , (𝑛 ∈ ℕ0 ↦ ((𝐴↑𝑛) / (!‘𝑛)))) ⇝ (exp‘𝐴)) |
32 | 30, 31 | eqbrtrd 5164 | 1 ⊢ (𝐴 ∈ ℂ → 𝐹 ⇝ (exp‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ∀wral 3056 class class class wbr 5142 ↦ cmpt 5225 Fn wfn 6537 ‘cfv 6542 (class class class)co 7414 ℂcc 11128 0cc0 11130 + caddc 11133 / cdiv 11893 ℕ0cn0 12494 ℤcz 12580 ℤ≥cuz 12844 ...cfz 13508 seqcseq 13990 ↑cexp 14050 !cfa 14256 ⇝ cli 15452 Σcsu 15656 expce 16029 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-inf2 9656 ax-cnex 11186 ax-resscn 11187 ax-1cn 11188 ax-icn 11189 ax-addcl 11190 ax-addrcl 11191 ax-mulcl 11192 ax-mulrcl 11193 ax-mulcom 11194 ax-addass 11195 ax-mulass 11196 ax-distr 11197 ax-i2m1 11198 ax-1ne0 11199 ax-1rid 11200 ax-rnegex 11201 ax-rrecex 11202 ax-cnre 11203 ax-pre-lttri 11204 ax-pre-lttrn 11205 ax-pre-ltadd 11206 ax-pre-mulgt0 11207 ax-pre-sup 11208 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-rmo 3371 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-se 5628 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-er 8718 df-pm 8839 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-sup 9457 df-inf 9458 df-oi 9525 df-card 9954 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11468 df-neg 11469 df-div 11894 df-nn 12235 df-2 12297 df-3 12298 df-n0 12495 df-z 12581 df-uz 12845 df-rp 12999 df-ico 13354 df-fz 13509 df-fzo 13652 df-fl 13781 df-seq 13991 df-exp 14051 df-fac 14257 df-hash 14314 df-shft 15038 df-cj 15070 df-re 15071 df-im 15072 df-sqrt 15206 df-abs 15207 df-limsup 15439 df-clim 15456 df-rlim 15457 df-sum 15657 df-ef 16035 |
This theorem is referenced by: (None) |
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