knoppndvlem9 - Mathbox for Asger C. Ipsen

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Theorem knoppndvlem9 36048

Description: Lemma for knoppndv 36062. (Contributed by Asger C. Ipsen, 15-Jun-2021.) (Revised by Asger C. Ipsen, 5-Jul-2021.)

**Hypotheses**
Ref	Expression
knoppndvlem9.t	⊢ 𝑇 = (𝑥 ∈ ℝ ↦ (abs‘((⌊‘(𝑥 + (1 / 2))) − 𝑥)))
knoppndvlem9.f	⊢ 𝐹 = (𝑦 ∈ ℝ ↦ (𝑛 ∈ ℕ₀ ↦ ((𝐶↑𝑛) · (𝑇‘(((2 · 𝑁)↑𝑛) · 𝑦)))))
knoppndvlem9.a	⊢ 𝐴 = ((((2 · 𝑁)↑-𝐽) / 2) · 𝑀)
knoppndvlem9.c	⊢ (𝜑 → 𝐶 ∈ (-1(,)1))
knoppndvlem9.j	⊢ (𝜑 → 𝐽 ∈ ℕ₀)
knoppndvlem9.m	⊢ (𝜑 → 𝑀 ∈ ℤ)
knoppndvlem9.n	⊢ (𝜑 → 𝑁 ∈ ℕ)
knoppndvlem9.1	⊢ (𝜑 → ¬ 2 ∥ 𝑀)

**Assertion**
Ref	Expression
knoppndvlem9	⊢ (𝜑 → ((𝐹‘𝐴)‘𝐽) = ((𝐶↑𝐽) / 2))

Distinct variable groups: 𝐴,𝑛,𝑦 𝐶,𝑛,𝑦 𝑛,𝐽 𝑛,𝑁,𝑦 𝑇,𝑛,𝑦 𝜑,𝑛,𝑦 Allowed substitution hints: 𝜑(𝑥) 𝐴(𝑥) 𝐶(𝑥) 𝑇(𝑥) 𝐹(𝑥,𝑦,𝑛) 𝐽(𝑥,𝑦) 𝑀(𝑥,𝑦,𝑛) 𝑁(𝑥)

Proof of Theorem knoppndvlem9 Dummy variable 𝑚 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		knoppndvlem9.t	. . 3 ⊢ 𝑇 = (𝑥 ∈ ℝ ↦ (abs‘((⌊‘(𝑥 + (1 / 2))) − 𝑥)))
2		knoppndvlem9.f	. . 3 ⊢ 𝐹 = (𝑦 ∈ ℝ ↦ (𝑛 ∈ ℕ₀ ↦ ((𝐶↑𝑛) · (𝑇‘(((2 · 𝑁)↑𝑛) · 𝑦)))))
3		knoppndvlem9.a	. . 3 ⊢ 𝐴 = ((((2 · 𝑁)↑-𝐽) / 2) · 𝑀)
4		knoppndvlem9.j	. . 3 ⊢ (𝜑 → 𝐽 ∈ ℕ₀)
5		knoppndvlem9.m	. . 3 ⊢ (𝜑 → 𝑀 ∈ ℤ)
6		knoppndvlem9.n	. . 3 ⊢ (𝜑 → 𝑁 ∈ ℕ)
7	1, 2, 3, 4, 5, 6	knoppndvlem7 36046	. 2 ⊢ (𝜑 → ((𝐹‘𝐴)‘𝐽) = ((𝐶↑𝐽) · (𝑇‘(𝑀 / 2))))
8		knoppndvlem9.1	. . . . 5 ⊢ (𝜑 → ¬ 2 ∥ 𝑀)
9		odd2np1 16312	. . . . . 6 ⊢ (𝑀 ∈ ℤ → (¬ 2 ∥ 𝑀 ↔ ∃𝑚 ∈ ℤ ((2 · 𝑚) + 1) = 𝑀))
10	5, 9	syl 17	. . . . 5 ⊢ (𝜑 → (¬ 2 ∥ 𝑀 ↔ ∃𝑚 ∈ ℤ ((2 · 𝑚) + 1) = 𝑀))
11	8, 10	mpbid 231	. . . 4 ⊢ (𝜑 → ∃𝑚 ∈ ℤ ((2 · 𝑚) + 1) = 𝑀)
12		eqcom 2732	. . . . . . . . . . 11 ⊢ (((2 · 𝑚) + 1) = 𝑀 ↔ 𝑀 = ((2 · 𝑚) + 1))
13	12	biimpi 215	. . . . . . . . . 10 ⊢ (((2 · 𝑚) + 1) = 𝑀 → 𝑀 = ((2 · 𝑚) + 1))
14	13	oveq1d 7428	. . . . . . . . 9 ⊢ (((2 · 𝑚) + 1) = 𝑀 → (𝑀 / 2) = (((2 · 𝑚) + 1) / 2))
15	14	adantl 480	. . . . . . . 8 ⊢ ((𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀) → (𝑀 / 2) = (((2 · 𝑚) + 1) / 2))
16	15	adantl 480	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑀 / 2) = (((2 · 𝑚) + 1) / 2))
17		2cnd 12315	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 2 ∈ ℂ)
18		zcn 12588	. . . . . . . . . . . 12 ⊢ (𝑚 ∈ ℤ → 𝑚 ∈ ℂ)
19	18	adantl 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 𝑚 ∈ ℂ)
20	17, 19	mulcld 11259	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (2 · 𝑚) ∈ ℂ)
21		1cnd 11234	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 1 ∈ ℂ)
22		2ne0 12341	. . . . . . . . . . 11 ⊢ 2 ≠ 0
23	22	a1i 11	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 2 ≠ 0)
24	20, 21, 17, 23	divdird 12053	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (((2 · 𝑚) + 1) / 2) = (((2 · 𝑚) / 2) + (1 / 2)))
25	19, 17, 23	divcan3d 12020	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → ((2 · 𝑚) / 2) = 𝑚)
26	25	oveq1d 7428	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (((2 · 𝑚) / 2) + (1 / 2)) = (𝑚 + (1 / 2)))
27	24, 26	eqtrd 2765	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (((2 · 𝑚) + 1) / 2) = (𝑚 + (1 / 2)))
28	27	adantrr 715	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (((2 · 𝑚) + 1) / 2) = (𝑚 + (1 / 2)))
29	16, 28	eqtrd 2765	. . . . . 6 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑀 / 2) = (𝑚 + (1 / 2)))
30	29	fveq2d 6894	. . . . 5 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑇‘(𝑀 / 2)) = (𝑇‘(𝑚 + (1 / 2))))
31		id 22	. . . . . . . 8 ⊢ (𝑚 ∈ ℤ → 𝑚 ∈ ℤ)
32	1, 31	dnizphlfeqhlf 36004	. . . . . . 7 ⊢ (𝑚 ∈ ℤ → (𝑇‘(𝑚 + (1 / 2))) = (1 / 2))
33	32	adantl 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (𝑇‘(𝑚 + (1 / 2))) = (1 / 2))
34	33	adantrr 715	. . . . 5 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑇‘(𝑚 + (1 / 2))) = (1 / 2))
35	30, 34	eqtrd 2765	. . . 4 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑇‘(𝑀 / 2)) = (1 / 2))
36	11, 35	rexlimddv 3151	. . 3 ⊢ (𝜑 → (𝑇‘(𝑀 / 2)) = (1 / 2))
37	36	oveq2d 7429	. 2 ⊢ (𝜑 → ((𝐶↑𝐽) · (𝑇‘(𝑀 / 2))) = ((𝐶↑𝐽) · (1 / 2)))
38		knoppndvlem9.c	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ (-1(,)1))
39	38	knoppndvlem3 36042	. . . . . . 7 ⊢ (𝜑 → (𝐶 ∈ ℝ ∧ (abs‘𝐶) < 1))
40	39	simpld 493	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ℝ)
41	40	recnd 11267	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ ℂ)
42	41, 4	expcld 14137	. . . 4 ⊢ (𝜑 → (𝐶↑𝐽) ∈ ℂ)
43		1cnd 11234	. . . 4 ⊢ (𝜑 → 1 ∈ ℂ)
44		2cnd 12315	. . . 4 ⊢ (𝜑 → 2 ∈ ℂ)
45	22	a1i 11	. . . 4 ⊢ (𝜑 → 2 ≠ 0)
46	42, 43, 44, 45	div12d 12051	. . 3 ⊢ (𝜑 → ((𝐶↑𝐽) · (1 / 2)) = (1 · ((𝐶↑𝐽) / 2)))
47	42, 44, 45	divcld 12015	. . . 4 ⊢ (𝜑 → ((𝐶↑𝐽) / 2) ∈ ℂ)
48	47	mullidd 11257	. . 3 ⊢ (𝜑 → (1 · ((𝐶↑𝐽) / 2)) = ((𝐶↑𝐽) / 2))
49	46, 48	eqtrd 2765	. 2 ⊢ (𝜑 → ((𝐶↑𝐽) · (1 / 2)) = ((𝐶↑𝐽) / 2))
50	7, 37, 49	3eqtrd 2769	1 ⊢ (𝜑 → ((𝐹‘𝐴)‘𝐽) = ((𝐶↑𝐽) / 2))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 394 = wceq 1533 ∈ wcel 2098 ≠ wne 2930 ∃wrex 3060 class class class wbr 5144 ↦ cmpt 5227 ‘cfv 6543 (class class class)co 7413 ℂcc 11131 ℝcr 11132 0cc0 11133 1c1 11134 + caddc 11136 · cmul 11138 < clt 11273 − cmin 11469 -cneg 11470 / cdiv 11896 ℕcn 12237 2c2 12292 ℕ₀cn0 12497 ℤcz 12583 (,)cioo 13351 ⌊cfl 13782 ↑cexp 14053 abscabs 15208 ∥ cdvds 16225

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 5281 ax-sep 5295 ax-nul 5302 ax-pow 5360 ax-pr 5424 ax-un 7735 ax-cnex 11189 ax-resscn 11190 ax-1cn 11191 ax-icn 11192 ax-addcl 11193 ax-addrcl 11194 ax-mulcl 11195 ax-mulrcl 11196 ax-mulcom 11197 ax-addass 11198 ax-mulass 11199 ax-distr 11200 ax-i2m1 11201 ax-1ne0 11202 ax-1rid 11203 ax-rnegex 11204 ax-rrecex 11205 ax-cnre 11206 ax-pre-lttri 11207 ax-pre-lttrn 11208 ax-pre-ltadd 11209 ax-pre-mulgt0 11210 ax-pre-sup 11211

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 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3961 df-nul 4320 df-if 4526 df-pw 4601 df-sn 4626 df-pr 4628 df-op 4632 df-uni 4905 df-iun 4994 df-br 5145 df-opab 5207 df-mpt 5228 df-tr 5262 df-id 5571 df-eprel 5577 df-po 5585 df-so 5586 df-fr 5628 df-we 5630 df-xp 5679 df-rel 5680 df-cnv 5681 df-co 5682 df-dm 5683 df-rn 5684 df-res 5685 df-ima 5686 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7369 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7866 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-er 8718 df-en 8958 df-dom 8959 df-sdom 8960 df-sup 9460 df-inf 9461 df-pnf 11275 df-mnf 11276 df-xr 11277 df-ltxr 11278 df-le 11279 df-sub 11471 df-neg 11472 df-div 11897 df-nn 12238 df-2 12300 df-3 12301 df-n0 12498 df-z 12584 df-uz 12848 df-rp 13002 df-ioo 13355 df-fl 13784 df-seq 13994 df-exp 14054 df-cj 15073 df-re 15074 df-im 15075 df-sqrt 15209 df-abs 15210 df-dvds 16226

This theorem is referenced by: knoppndvlem10 36049

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