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Theorem divalglem2 16335

Description: Lemma for divalg 16343. (Contributed by Paul Chapman, 21-Mar-2011.) (Revised by AV, 2-Oct-2020.)

**Hypotheses**
Ref	Expression
divalglem0.1	⊢ 𝑁 ∈ ℤ
divalglem0.2	⊢ 𝐷 ∈ ℤ
divalglem1.3	⊢ 𝐷 ≠ 0
divalglem2.4	⊢ 𝑆 = {𝑟 ∈ ℕ₀ ∣ 𝐷 ∥ (𝑁 − 𝑟)}

**Assertion**
Ref	Expression
divalglem2	⊢ inf(𝑆, ℝ, < ) ∈ 𝑆

Distinct variable groups: 𝐷,𝑟 𝑁,𝑟 Allowed substitution hint: 𝑆(𝑟)

**Proof of Theorem divalglem2**
Step	Hyp	Ref	Expression
1		divalglem2.4	. . . 4 ⊢ 𝑆 = {𝑟 ∈ ℕ₀ ∣ 𝐷 ∥ (𝑁 − 𝑟)}
2	1	ssrab3 4072	. . 3 ⊢ 𝑆 ⊆ ℕ₀
3		nn0uz 12861	. . 3 ⊢ ℕ₀ = (ℤ_≥‘0)
4	2, 3	sseqtri 4010	. 2 ⊢ 𝑆 ⊆ (ℤ_≥‘0)
5		divalglem0.1	. . . . . 6 ⊢ 𝑁 ∈ ℤ
6		divalglem0.2	. . . . . . . . 9 ⊢ 𝐷 ∈ ℤ
7		zmulcl 12608	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℤ ∧ 𝐷 ∈ ℤ) → (𝑁 · 𝐷) ∈ ℤ)
8	5, 6, 7	mp2an 689	. . . . . . . 8 ⊢ (𝑁 · 𝐷) ∈ ℤ
9		nn0abscl 15256	. . . . . . . 8 ⊢ ((𝑁 · 𝐷) ∈ ℤ → (abs‘(𝑁 · 𝐷)) ∈ ℕ₀)
10	8, 9	ax-mp 5	. . . . . . 7 ⊢ (abs‘(𝑁 · 𝐷)) ∈ ℕ₀
11	10	nn0zi 12584	. . . . . 6 ⊢ (abs‘(𝑁 · 𝐷)) ∈ ℤ
12		zaddcl 12599	. . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ (abs‘(𝑁 · 𝐷)) ∈ ℤ) → (𝑁 + (abs‘(𝑁 · 𝐷))) ∈ ℤ)
13	5, 11, 12	mp2an 689	. . . . 5 ⊢ (𝑁 + (abs‘(𝑁 · 𝐷))) ∈ ℤ
14		divalglem1.3	. . . . . 6 ⊢ 𝐷 ≠ 0
15	5, 6, 14	divalglem1 16334	. . . . 5 ⊢ 0 ≤ (𝑁 + (abs‘(𝑁 · 𝐷)))
16		elnn0z 12568	. . . . 5 ⊢ ((𝑁 + (abs‘(𝑁 · 𝐷))) ∈ ℕ₀ ↔ ((𝑁 + (abs‘(𝑁 · 𝐷))) ∈ ℤ ∧ 0 ≤ (𝑁 + (abs‘(𝑁 · 𝐷)))))
17	13, 15, 16	mpbir2an 708	. . . 4 ⊢ (𝑁 + (abs‘(𝑁 · 𝐷))) ∈ ℕ₀
18		iddvds 16210	. . . . . . . 8 ⊢ (𝐷 ∈ ℤ → 𝐷 ∥ 𝐷)
19		dvdsabsb 16216	. . . . . . . . 9 ⊢ ((𝐷 ∈ ℤ ∧ 𝐷 ∈ ℤ) → (𝐷 ∥ 𝐷 ↔ 𝐷 ∥ (abs‘𝐷)))
20	19	anidms 566	. . . . . . . 8 ⊢ (𝐷 ∈ ℤ → (𝐷 ∥ 𝐷 ↔ 𝐷 ∥ (abs‘𝐷)))
21	18, 20	mpbid 231	. . . . . . 7 ⊢ (𝐷 ∈ ℤ → 𝐷 ∥ (abs‘𝐷))
22	6, 21	ax-mp 5	. . . . . 6 ⊢ 𝐷 ∥ (abs‘𝐷)
23		nn0abscl 15256	. . . . . . . . 9 ⊢ (𝑁 ∈ ℤ → (abs‘𝑁) ∈ ℕ₀)
24	5, 23	ax-mp 5	. . . . . . . 8 ⊢ (abs‘𝑁) ∈ ℕ₀
25	24	nn0negzi 12598	. . . . . . 7 ⊢ -(abs‘𝑁) ∈ ℤ
26		nn0abscl 15256	. . . . . . . . 9 ⊢ (𝐷 ∈ ℤ → (abs‘𝐷) ∈ ℕ₀)
27	6, 26	ax-mp 5	. . . . . . . 8 ⊢ (abs‘𝐷) ∈ ℕ₀
28	27	nn0zi 12584	. . . . . . 7 ⊢ (abs‘𝐷) ∈ ℤ
29		dvdsmultr2 16238	. . . . . . 7 ⊢ ((𝐷 ∈ ℤ ∧ -(abs‘𝑁) ∈ ℤ ∧ (abs‘𝐷) ∈ ℤ) → (𝐷 ∥ (abs‘𝐷) → 𝐷 ∥ (-(abs‘𝑁) · (abs‘𝐷))))
30	6, 25, 28, 29	mp3an 1457	. . . . . 6 ⊢ (𝐷 ∥ (abs‘𝐷) → 𝐷 ∥ (-(abs‘𝑁) · (abs‘𝐷)))
31	22, 30	ax-mp 5	. . . . 5 ⊢ 𝐷 ∥ (-(abs‘𝑁) · (abs‘𝐷))
32		zcn 12560	. . . . . . . . 9 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
33	5, 32	ax-mp 5	. . . . . . . 8 ⊢ 𝑁 ∈ ℂ
34		zcn 12560	. . . . . . . . 9 ⊢ (𝐷 ∈ ℤ → 𝐷 ∈ ℂ)
35	6, 34	ax-mp 5	. . . . . . . 8 ⊢ 𝐷 ∈ ℂ
36	33, 35	absmuli 15348	. . . . . . 7 ⊢ (abs‘(𝑁 · 𝐷)) = ((abs‘𝑁) · (abs‘𝐷))
37	36	negeqi 11450	. . . . . 6 ⊢ -(abs‘(𝑁 · 𝐷)) = -((abs‘𝑁) · (abs‘𝐷))
38		df-neg 11444	. . . . . . 7 ⊢ -(abs‘(𝑁 · 𝐷)) = (0 − (abs‘(𝑁 · 𝐷)))
39	33	subidi 11528	. . . . . . . 8 ⊢ (𝑁 − 𝑁) = 0
40	39	oveq1i 7411	. . . . . . 7 ⊢ ((𝑁 − 𝑁) − (abs‘(𝑁 · 𝐷))) = (0 − (abs‘(𝑁 · 𝐷)))
41	10	nn0cni 12481	. . . . . . . 8 ⊢ (abs‘(𝑁 · 𝐷)) ∈ ℂ
42		subsub4 11490	. . . . . . . 8 ⊢ ((𝑁 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ (abs‘(𝑁 · 𝐷)) ∈ ℂ) → ((𝑁 − 𝑁) − (abs‘(𝑁 · 𝐷))) = (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷)))))
43	33, 33, 41, 42	mp3an 1457	. . . . . . 7 ⊢ ((𝑁 − 𝑁) − (abs‘(𝑁 · 𝐷))) = (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷))))
44	38, 40, 43	3eqtr2ri 2759	. . . . . 6 ⊢ (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷)))) = -(abs‘(𝑁 · 𝐷))
45	33	abscli 15339	. . . . . . . 8 ⊢ (abs‘𝑁) ∈ ℝ
46	45	recni 11225	. . . . . . 7 ⊢ (abs‘𝑁) ∈ ℂ
47	35	abscli 15339	. . . . . . . 8 ⊢ (abs‘𝐷) ∈ ℝ
48	47	recni 11225	. . . . . . 7 ⊢ (abs‘𝐷) ∈ ℂ
49	46, 48	mulneg1i 11657	. . . . . 6 ⊢ (-(abs‘𝑁) · (abs‘𝐷)) = -((abs‘𝑁) · (abs‘𝐷))
50	37, 44, 49	3eqtr4i 2762	. . . . 5 ⊢ (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷)))) = (-(abs‘𝑁) · (abs‘𝐷))
51	31, 50	breqtrri 5165	. . . 4 ⊢ 𝐷 ∥ (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷))))
52		oveq2 7409	. . . . . 6 ⊢ (𝑟 = (𝑁 + (abs‘(𝑁 · 𝐷))) → (𝑁 − 𝑟) = (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷)))))
53	52	breq2d 5150	. . . . 5 ⊢ (𝑟 = (𝑁 + (abs‘(𝑁 · 𝐷))) → (𝐷 ∥ (𝑁 − 𝑟) ↔ 𝐷 ∥ (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷))))))
54	53, 1	elrab2 3678	. . . 4 ⊢ ((𝑁 + (abs‘(𝑁 · 𝐷))) ∈ 𝑆 ↔ ((𝑁 + (abs‘(𝑁 · 𝐷))) ∈ ℕ₀ ∧ 𝐷 ∥ (𝑁 − (𝑁 + (abs‘(𝑁 · 𝐷))))))
55	17, 51, 54	mpbir2an 708	. . 3 ⊢ (𝑁 + (abs‘(𝑁 · 𝐷))) ∈ 𝑆
56	55	ne0ii 4329	. 2 ⊢ 𝑆 ≠ ∅
57		infssuzcl 12913	. 2 ⊢ ((𝑆 ⊆ (ℤ_≥‘0) ∧ 𝑆 ≠ ∅) → inf(𝑆, ℝ, < ) ∈ 𝑆)
58	4, 56, 57	mp2an 689	1 ⊢ inf(𝑆, ℝ, < ) ∈ 𝑆

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 = wceq 1533 ∈ wcel 2098 ≠ wne 2932 {crab 3424 ⊆ wss 3940 ∅c0 4314 class class class wbr 5138 ‘cfv 6533 (class class class)co 7401 infcinf 9432 ℂcc 11104 ℝcr 11105 0cc0 11106 + caddc 11109 · cmul 11111 < clt 11245 ≤ cle 11246 − cmin 11441 -cneg 11442 ℕ₀cn0 12469 ℤcz 12555 ℤ_≥cuz 12819 abscabs 15178 ∥ cdvds 16194

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 2163 ax-ext 2695 ax-sep 5289 ax-nul 5296 ax-pow 5353 ax-pr 5417 ax-un 7718 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-nel 3039 df-ral 3054 df-rex 3063 df-rmo 3368 df-reu 3369 df-rab 3425 df-v 3468 df-sbc 3770 df-csb 3886 df-dif 3943 df-un 3945 df-in 3947 df-ss 3957 df-pss 3959 df-nul 4315 df-if 4521 df-pw 4596 df-sn 4621 df-pr 4623 df-op 4627 df-uni 4900 df-iun 4989 df-br 5139 df-opab 5201 df-mpt 5222 df-tr 5256 df-id 5564 df-eprel 5570 df-po 5578 df-so 5579 df-fr 5621 df-we 5623 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6290 df-ord 6357 df-on 6358 df-lim 6359 df-suc 6360 df-iota 6485 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7357 df-ov 7404 df-oprab 7405 df-mpo 7406 df-om 7849 df-2nd 7969 df-frecs 8261 df-wrecs 8292 df-recs 8366 df-rdg 8405 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-sup 9433 df-inf 9434 df-pnf 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11443 df-neg 11444 df-div 11869 df-nn 12210 df-2 12272 df-3 12273 df-n0 12470 df-z 12556 df-uz 12820 df-rp 12972 df-seq 13964 df-exp 14025 df-cj 15043 df-re 15044 df-im 15045 df-sqrt 15179 df-abs 15180 df-dvds 16195

This theorem is referenced by: divalglem5 16337 divalglem9 16341

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