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Theorem ply1termlem 26153

Description: Lemma for ply1term 26154. (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 767	. . . . . . 7 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑁 ∈ ℕ₀)
3		nn0uz 12892	. . . . . . 7 ⊢ ℕ₀ = (ℤ_≥‘0)
4	2, 3	eleqtrdi 2835	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑁 ∈ (ℤ_≥‘0))
5		fzss1 13570	. . . . . 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 13542	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝑁...𝑁) → 𝑘 = 𝑁)
8	7	adantl 480	. . . . . . . 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 765	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝐴 ∈ ℂ)
12	11	adantr 479	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝐴 ∈ ℂ)
13	10, 12	eqeltrd 2825	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → if(𝑘 = 𝑁, 𝐴, 0) ∈ ℂ)
14		simplr 767	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝑧 ∈ ℂ)
15	2	adantr 479	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝑁 ∈ ℕ₀)
16	8, 15	eqeltrd 2825	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → 𝑘 ∈ ℕ₀)
17	14, 16	expcld 14140	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → (𝑧↑𝑘) ∈ ℂ)
18	13, 17	mulcld 11262	. . . . 5 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ (𝑁...𝑁)) → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) ∈ ℂ)
19		eldifn 4120	. . . . . . . . . 10 ⊢ (𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁)) → ¬ 𝑘 ∈ (𝑁...𝑁))
20	19	adantl 480	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → ¬ 𝑘 ∈ (𝑁...𝑁))
21	2	adantr 479	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → 𝑁 ∈ ℕ₀)
22	21	nn0zd 12612	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → 𝑁 ∈ ℤ)
23		fzsn 13573	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℤ → (𝑁...𝑁) = {𝑁})
24	23	eleq2d 2811	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → (𝑘 ∈ (𝑁...𝑁) ↔ 𝑘 ∈ {𝑁}))
25		elsn2g 4662	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → (𝑘 ∈ {𝑁} ↔ 𝑘 = 𝑁))
26	24, 25	bitrd 278	. . . . . . . . . 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 323	. . . . . . . 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 7430	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (0 · (𝑧↑𝑘)))
31		simpr 483	. . . . . . . 8 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑧 ∈ ℂ)
32		eldifi 4119	. . . . . . . . 9 ⊢ (𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁)) → 𝑘 ∈ (0...𝑁))
33		elfznn0 13624	. . . . . . . . 9 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
34	32, 33	syl 17	. . . . . . . 8 ⊢ (𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁)) → 𝑘 ∈ ℕ₀)
35		expcl 14074	. . . . . . . 8 ⊢ ((𝑧 ∈ ℂ ∧ 𝑘 ∈ ℕ₀) → (𝑧↑𝑘) ∈ ℂ)
36	31, 34, 35	syl2an 594	. . . . . . 7 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (𝑧↑𝑘) ∈ ℂ)
37	36	mul02d 11440	. . . . . 6 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (0 · (𝑧↑𝑘)) = 0)
38	30, 37	eqtrd 2765	. . . . 5 ⊢ ((((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) ∧ 𝑘 ∈ ((0...𝑁) ∖ (𝑁...𝑁))) → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = 0)
39		fzfid 13968	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → (0...𝑁) ∈ Fin)
40	6, 18, 38, 39	fsumss 15701	. . . 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 12612	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → 𝑁 ∈ ℤ)
42	31, 2	expcld 14140	. . . . . 6 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → (𝑧↑𝑁) ∈ ℂ)
43	11, 42	mulcld 11262	. . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → (𝐴 · (𝑧↑𝑁)) ∈ ℂ)
44		oveq2 7423	. . . . . . 7 ⊢ (𝑘 = 𝑁 → (𝑧↑𝑘) = (𝑧↑𝑁))
45	9, 44	oveq12d 7433	. . . . . 6 ⊢ (𝑘 = 𝑁 → (if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (𝐴 · (𝑧↑𝑁)))
46	45	fsum1 15723	. . . . 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 582	. . . 4 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → Σ𝑘 ∈ (𝑁...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (𝐴 · (𝑧↑𝑁)))
48	40, 47	eqtr3d 2767	. . 3 ⊢ (((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑧 ∈ ℂ) → Σ𝑘 ∈ (0...𝑁)(if(𝑘 = 𝑁, 𝐴, 0) · (𝑧↑𝑘)) = (𝐴 · (𝑧↑𝑁)))
49	48	mpteq2dva 5243	. 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 2784	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 394 = wceq 1533 ∈ wcel 2098 ∖ cdif 3937 ⊆ wss 3940 ifcif 4524 {csn 4624 ↦ cmpt 5226 ‘cfv 6542 (class class class)co 7415 ℂcc 11134 0cc0 11136 · cmul 11141 ℕ₀cn0 12500 ℤcz 12586 ℤ_≥cuz 12850 ...cfz 13514 ↑cexp 14056 Σcsu 15662

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-rep 5280 ax-sep 5294 ax-nul 5301 ax-pow 5359 ax-pr 5423 ax-un 7737 ax-inf2 9662 ax-cnex 11192 ax-resscn 11193 ax-1cn 11194 ax-icn 11195 ax-addcl 11196 ax-addrcl 11197 ax-mulcl 11198 ax-mulrcl 11199 ax-mulcom 11200 ax-addass 11201 ax-mulass 11202 ax-distr 11203 ax-i2m1 11204 ax-1ne0 11205 ax-1rid 11206 ax-rnegex 11207 ax-rrecex 11208 ax-cnre 11209 ax-pre-lttri 11210 ax-pre-lttrn 11211 ax-pre-ltadd 11212 ax-pre-mulgt0 11213 ax-pre-sup 11214

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3770 df-csb 3886 df-dif 3943 df-un 3945 df-in 3947 df-ss 3957 df-pss 3960 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 5144 df-opab 5206 df-mpt 5227 df-tr 5261 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 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 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 7371 df-ov 7418 df-oprab 7419 df-mpo 7420 df-om 7868 df-1st 7989 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8388 df-rdg 8427 df-1o 8483 df-er 8721 df-en 8961 df-dom 8962 df-sdom 8963 df-fin 8964 df-sup 9463 df-oi 9531 df-card 9960 df-pnf 11278 df-mnf 11279 df-xr 11280 df-ltxr 11281 df-le 11282 df-sub 11474 df-neg 11475 df-div 11900 df-nn 12241 df-2 12303 df-3 12304 df-n0 12501 df-z 12587 df-uz 12851 df-rp 13005 df-fz 13515 df-fzo 13658 df-seq 13997 df-exp 14057 df-hash 14320 df-cj 15076 df-re 15077 df-im 15078 df-sqrt 15212 df-abs 15213 df-clim 15462 df-sum 15663

This theorem is referenced by: ply1term 26154 coe1termlem 26208

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