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Theorem ply1termlem 26111

Description: Lemma for ply1term 26112. (Contributed by Mario Carneiro, 26-Jul-2014.)

**Hypothesis**
Ref	Expression
ply1term.1	⊢ 𝐹 = (𝑧 ∈ ℂ ↦ (𝐴 · (𝑧↑𝑁)))

**Assertion**
Ref	Expression
ply1termlem	⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘))))

Distinct variable groups: 𝑧,𝑘,𝐴 𝑘,𝑁,𝑧 Allowed substitution hints: 𝐹(𝑧,𝑘)

**Proof of Theorem ply1termlem**
Step	Hyp	Ref	Expression
1		ply1term.1	. 2 ⊢ 𝐹 = (𝑧 ∈ ℂ ↦ (𝐴 · (𝑧↑𝑁)))
2		simplr 768	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑁 ∈ ℕ₀)
3		nn0uz 12880	. . . . . . 7 ⊢ ℕ₀ = (ℤ_≥‘0)
4	2, 3	eleqtrdi 2838	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑁 ∈ (ℤ_≥‘0))
5		fzss1 13558	. . . . . 6 ⊢ (𝑁 ∈ (ℤ_≥‘0) → (𝑁...𝑁) ⊆ (0...𝑁))
6	4, 5	syl 17	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → (𝑁...𝑁) ⊆ (0...𝑁))
7		elfz1eq 13530	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝑁...𝑁) → 𝑘 = 𝑁)
8	7	adantl 481	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝑘 = 𝑁)
9		iftrue 4530	. . . . . . . 8 ⊢ (𝑘 = 𝑁 → if(𝑘 = 𝑁, 𝐴, 0) = 𝐴)
10	8, 9	syl 17	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → if(𝑘 = 𝑁, 𝐴, 0) = 𝐴)
11		simpll 766	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝐴 ∈ ℂ)
12	11	adantr 480	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝐴 ∈ ℂ)
13	10, 12	eqeltrd 2828	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → if(𝑘 = 𝑁, 𝐴, 0) ∈ ℂ)
14		simplr 768	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝑧 ∈ ℂ)
15	2	adantr 480	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝑁 ∈ ℕ₀)
16	8, 15	eqeltrd 2828	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝑘 ∈ ℕ₀)
17	14, 16	expcld 14128	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → (𝑧↑𝑘) ∈ ℂ)
18	13, 17	mulcld 11250	. . . . 5 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) ∈ ℂ)
19		eldifn 4123	. . . . . . . . . 10 ⊢ (𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁)) → ¬ 𝑘 ∈ (𝑁...𝑁))
20	19	adantl 481	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → ¬ 𝑘 ∈ (𝑁...𝑁))
21	2	adantr 480	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → 𝑁 ∈ ℕ₀)
22	21	nn0zd 12600	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → 𝑁 ∈ ℤ)
23		fzsn 13561	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℤ → (𝑁...𝑁) = {𝑁})
24	23	eleq2d 2814	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → (𝑘 ∈ (𝑁...𝑁) ↔ 𝑘 ∈ {𝑁}))
25		elsn2g 4662	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → (𝑘 ∈ {𝑁} ↔ 𝑘 = 𝑁))
26	24, 25	bitrd 279	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℤ → (𝑘 ∈ (𝑁...𝑁) ↔ 𝑘 = 𝑁))
27	22, 26	syl 17	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (𝑘 ∈ (𝑁...𝑁) ↔ 𝑘 = 𝑁))
28	20, 27	mtbid 324	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → ¬ 𝑘 = 𝑁)
29	28	iffalsed 4535	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → if(𝑘 = 𝑁, 𝐴, 0) = 0)
30	29	oveq1d 7429	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (0 · (𝑧↑𝑘)))
31		simpr 484	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑧 ∈ ℂ)
32		eldifi 4122	. . . . . . . . 9 ⊢ (𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁)) → 𝑘 ∈ (0...𝑁))
33		elfznn0 13612	. . . . . . . . 9 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
34	32, 33	syl 17	. . . . . . . 8 ⊢ (𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁)) → 𝑘 ∈ ℕ₀)
35		expcl 14062	. . . . . . . 8 ⊢ ((𝑧 ∈ ℂ ∧ 𝑘 ∈ ℕ₀) → (𝑧↑𝑘) ∈ ℂ)
36	31, 34, 35	syl2an 595	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (𝑧↑𝑘) ∈ ℂ)
37	36	mul02d 11428	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (0 · (𝑧↑𝑘)) = 0)
38	30, 37	eqtrd 2767	. . . . 5 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = 0)
39		fzfid 13956	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → (0...𝑁) ∈ Fin)
40	6, 18, 38, 39	fsumss 15689	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → Σ𝑘 ∈ (𝑁...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = Σ𝑘 ∈ (0...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)))
41	2	nn0zd 12600	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑁 ∈ ℤ)
42	31, 2	expcld 14128	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → (𝑧↑𝑁) ∈ ℂ)
43	11, 42	mulcld 11250	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → (𝐴 · (𝑧↑𝑁)) ∈ ℂ)
44		oveq2 7422	. . . . . . 7 ⊢ (𝑘 = 𝑁 → (𝑧↑𝑘) = (𝑧↑𝑁))
45	9, 44	oveq12d 7432	. . . . . 6 ⊢ (𝑘 = 𝑁 → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (𝐴 · (𝑧↑𝑁)))
46	45	fsum1 15711	. . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ (𝐴 · (𝑧↑𝑁)) ∈ ℂ) → Σ𝑘 ∈ (𝑁...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (𝐴 · (𝑧↑𝑁)))
47	41, 43, 46	syl2anc 583	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → Σ𝑘 ∈ (𝑁...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (𝐴 · (𝑧↑𝑁)))
48	40, 47	eqtr3d 2769	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → Σ𝑘 ∈ (0...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (𝐴 · (𝑧↑𝑁)))
49	48	mpteq2dva 5242	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘))) = (𝑧 ∈ ℂ ↦ (𝐴 · (𝑧↑𝑁))))
50	1, 49	eqtr4id 2786	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘))))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ∖ cdif 3941 ⊆ wss 3944 ifcif 4524 {csn 4624 ↦ cmpt 5225 ‘cfv 6542 (class class class)co 7414 ℂcc 11122 0cc0 11124 · cmul 11129 ℕ₀cn0 12488 ℤcz 12574 ℤ_≥cuz 12838 ...cfz 13502 ↑cexp 14044 Σcsu 15650

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 7732 ax-inf2 9650 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 ax-pre-sup 11202

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 7863 df-1st 7985 df-2nd 7986 df-frecs 8278 df-wrecs 8309 df-recs 8383 df-rdg 8422 df-1o 8478 df-er 8716 df-en 8954 df-dom 8955 df-sdom 8956 df-fin 8957 df-sup 9451 df-oi 9519 df-card 9948 df-pnf 11266 df-mnf 11267 df-xr 11268 df-ltxr 11269 df-le 11270 df-sub 11462 df-neg 11463 df-div 11888 df-nn 12229 df-2 12291 df-3 12292 df-n0 12489 df-z 12575 df-uz 12839 df-rp 12993 df-fz 13503 df-fzo 13646 df-seq 13985 df-exp 14045 df-hash 14308 df-cj 15064 df-re 15065 df-im 15066 df-sqrt 15200 df-abs 15201 df-clim 15450 df-sum 15651

This theorem is referenced by: ply1term 26112 coe1termlem 26166

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