knoppndvlem9 - Mathbox for Asger C. Ipsen

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Theorem knoppndvlem9 35931

Description: Lemma for knoppndv 35945. (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 35929	. 2 ⊢ (𝜑 → ((𝐹‘𝐴)‘𝐽) = ((𝐶↑𝐽) · (𝑇‘(𝑀 / 2))))
8		knoppndvlem9.1	. . . . 5 ⊢ (𝜑 → ¬ 2 ∥ 𝑀)
9		odd2np1 16309	. . . . . 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 2734	. . . . . . . . . . 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 7429	. . . . . . . . 9 ⊢ (((2 · 𝑚) + 1) = 𝑀 → (𝑀 / 2) = (((2 · 𝑚) + 1) / 2))
15	14	adantl 481	. . . . . . . 8 ⊢ ((𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀) → (𝑀 / 2) = (((2 · 𝑚) + 1) / 2))
16	15	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑀 / 2) = (((2 · 𝑚) + 1) / 2))
17		2cnd 12312	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 2 ∈ ℂ)
18		zcn 12585	. . . . . . . . . . . 12 ⊢ (𝑚 ∈ ℤ → 𝑚 ∈ ℂ)
19	18	adantl 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 𝑚 ∈ ℂ)
20	17, 19	mulcld 11256	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (2 · 𝑚) ∈ ℂ)
21		1cnd 11231	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 1 ∈ ℂ)
22		2ne0 12338	. . . . . . . . . . 11 ⊢ 2 ≠ 0
23	22	a1i 11	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → 2 ≠ 0)
24	20, 21, 17, 23	divdird 12050	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (((2 · 𝑚) + 1) / 2) = (((2 · 𝑚) / 2) + (1 / 2)))
25	19, 17, 23	divcan3d 12017	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → ((2 · 𝑚) / 2) = 𝑚)
26	25	oveq1d 7429	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (((2 · 𝑚) / 2) + (1 / 2)) = (𝑚 + (1 / 2)))
27	24, 26	eqtrd 2767	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (((2 · 𝑚) + 1) / 2) = (𝑚 + (1 / 2)))
28	27	adantrr 716	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (((2 · 𝑚) + 1) / 2) = (𝑚 + (1 / 2)))
29	16, 28	eqtrd 2767	. . . . . 6 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑀 / 2) = (𝑚 + (1 / 2)))
30	29	fveq2d 6895	. . . . 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 35887	. . . . . . 7 ⊢ (𝑚 ∈ ℤ → (𝑇‘(𝑚 + (1 / 2))) = (1 / 2))
33	32	adantl 481	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → (𝑇‘(𝑚 + (1 / 2))) = (1 / 2))
34	33	adantrr 716	. . . . 5 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑇‘(𝑚 + (1 / 2))) = (1 / 2))
35	30, 34	eqtrd 2767	. . . 4 ⊢ ((𝜑 ∧ (𝑚 ∈ ℤ ∧ ((2 · 𝑚) + 1) = 𝑀)) → (𝑇‘(𝑀 / 2)) = (1 / 2))
36	11, 35	rexlimddv 3156	. . 3 ⊢ (𝜑 → (𝑇‘(𝑀 / 2)) = (1 / 2))
37	36	oveq2d 7430	. 2 ⊢ (𝜑 → ((𝐶↑𝐽) · (𝑇‘(𝑀 / 2))) = ((𝐶↑𝐽) · (1 / 2)))
38		knoppndvlem9.c	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ (-1(,)1))
39	38	knoppndvlem3 35925	. . . . . . 7 ⊢ (𝜑 → (𝐶 ∈ ℝ ∧ (abs‘𝐶) < 1))
40	39	simpld 494	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ℝ)
41	40	recnd 11264	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ ℂ)
42	41, 4	expcld 14134	. . . 4 ⊢ (𝜑 → (𝐶↑𝐽) ∈ ℂ)
43		1cnd 11231	. . . 4 ⊢ (𝜑 → 1 ∈ ℂ)
44		2cnd 12312	. . . 4 ⊢ (𝜑 → 2 ∈ ℂ)
45	22	a1i 11	. . . 4 ⊢ (𝜑 → 2 ≠ 0)
46	42, 43, 44, 45	div12d 12048	. . 3 ⊢ (𝜑 → ((𝐶↑𝐽) · (1 / 2)) = (1 · ((𝐶↑𝐽) / 2)))
47	42, 44, 45	divcld 12012	. . . 4 ⊢ (𝜑 → ((𝐶↑𝐽) / 2) ∈ ℂ)
48	47	mullidd 11254	. . 3 ⊢ (𝜑 → (1 · ((𝐶↑𝐽) / 2)) = ((𝐶↑𝐽) / 2))
49	46, 48	eqtrd 2767	. 2 ⊢ (𝜑 → ((𝐶↑𝐽) · (1 / 2)) = ((𝐶↑𝐽) / 2))
50	7, 37, 49	3eqtrd 2771	1 ⊢ (𝜑 → ((𝐹‘𝐴)‘𝐽) = ((𝐶↑𝐽) / 2))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ≠ wne 2935 ∃wrex 3065 class class class wbr 5142 ↦ cmpt 5225 ‘cfv 6542 (class class class)co 7414 ℂcc 11128 ℝcr 11129 0cc0 11130 1c1 11131 + caddc 11133 · cmul 11135 < clt 11270 − cmin 11466 -cneg 11467 / cdiv 11893 ℕcn 12234 2c2 12289 ℕ₀cn0 12494 ℤcz 12580 (,)cioo 13348 ⌊cfl 13779 ↑cexp 14050 abscabs 15205 ∥ cdvds 16222

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-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-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-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-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-er 8718 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9457 df-inf 9458 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-ioo 13352 df-fl 13781 df-seq 13991 df-exp 14051 df-cj 15070 df-re 15071 df-im 15072 df-sqrt 15206 df-abs 15207 df-dvds 16223

This theorem is referenced by: knoppndvlem10 35932

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