4sqlem6 - Metamath Proof Explorer

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Theorem 4sqlem6 16885

Description: Lemma for 4sq 16906. (Contributed by Mario Carneiro, 15-Jul-2014.)

**Hypotheses**
Ref	Expression
4sqlem5.2	⊢ (𝜑 → 𝐴 ∈ ℤ)
4sqlem5.3	⊢ (𝜑 → 𝑀 ∈ ℕ)
4sqlem5.4	⊢ 𝐵 = (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2))

**Assertion**
Ref	Expression
4sqlem6	⊢ (𝜑 → (-(𝑀 / 2) ≤ 𝐵 ∧ 𝐵 < (𝑀 / 2)))

**Proof of Theorem 4sqlem6**
Step	Hyp	Ref	Expression
1		0red 11149	. . . 4 ⊢ (𝜑 → 0 ∈ ℝ)
2		4sqlem5.2	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℤ)
3	2	zred 12610	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ)
4		4sqlem5.3	. . . . . . . 8 ⊢ (𝜑 → 𝑀 ∈ ℕ)
5	4	nnred 12174	. . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℝ)
6	5	rehalfcld 12402	. . . . . 6 ⊢ (𝜑 → (𝑀 / 2) ∈ ℝ)
7	3, 6	readdcld 11175	. . . . 5 ⊢ (𝜑 → (𝐴 + (𝑀 / 2)) ∈ ℝ)
8	4	nnrpd 12961	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℝ⁺)
9	7, 8	modcld 13809	. . . 4 ⊢ (𝜑 → ((𝐴 + (𝑀 / 2)) mod 𝑀) ∈ ℝ)
10		modge0 13813	. . . . 5 ⊢ (((𝐴 + (𝑀 / 2)) ∈ ℝ ∧ 𝑀 ∈ ℝ⁺) → 0 ≤ ((𝐴 + (𝑀 / 2)) mod 𝑀))
11	7, 8, 10	syl2anc 585	. . . 4 ⊢ (𝜑 → 0 ≤ ((𝐴 + (𝑀 / 2)) mod 𝑀))
12	1, 9, 6, 11	lesub1dd 11767	. . 3 ⊢ (𝜑 → (0 − (𝑀 / 2)) ≤ (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2)))
13		df-neg 11381	. . 3 ⊢ -(𝑀 / 2) = (0 − (𝑀 / 2))
14		4sqlem5.4	. . 3 ⊢ 𝐵 = (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2))
15	12, 13, 14	3brtr4g 5134	. 2 ⊢ (𝜑 → -(𝑀 / 2) ≤ 𝐵)
16		modlt 13814	. . . . . 6 ⊢ (((𝐴 + (𝑀 / 2)) ∈ ℝ ∧ 𝑀 ∈ ℝ⁺) → ((𝐴 + (𝑀 / 2)) mod 𝑀) < 𝑀)
17	7, 8, 16	syl2anc 585	. . . . 5 ⊢ (𝜑 → ((𝐴 + (𝑀 / 2)) mod 𝑀) < 𝑀)
18	4	nncnd 12175	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℂ)
19	18	2halvesd 12401	. . . . 5 ⊢ (𝜑 → ((𝑀 / 2) + (𝑀 / 2)) = 𝑀)
20	17, 19	breqtrrd 5128	. . . 4 ⊢ (𝜑 → ((𝐴 + (𝑀 / 2)) mod 𝑀) < ((𝑀 / 2) + (𝑀 / 2)))
21	9, 6, 6	ltsubaddd 11747	. . . 4 ⊢ (𝜑 → ((((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2)) < (𝑀 / 2) ↔ ((𝐴 + (𝑀 / 2)) mod 𝑀) < ((𝑀 / 2) + (𝑀 / 2))))
22	20, 21	mpbird 257	. . 3 ⊢ (𝜑 → (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2)) < (𝑀 / 2))
23	14, 22	eqbrtrid 5135	. 2 ⊢ (𝜑 → 𝐵 < (𝑀 / 2))
24	15, 23	jca 511	1 ⊢ (𝜑 → (-(𝑀 / 2) ≤ 𝐵 ∧ 𝐵 < (𝑀 / 2)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5100 (class class class)co 7370 ℝcr 11039 0cc0 11040 + caddc 11043 < clt 11180 ≤ cle 11181 − cmin 11378 -cneg 11379 / cdiv 11808 ℕcn 12159 2c2 12214 ℤcz 12502 ℝ⁺crp 12919 mod cmo 13803

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 ax-cnex 11096 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 ax-pre-mulgt0 11117 ax-pre-sup 11118

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5529 df-eprel 5534 df-po 5542 df-so 5543 df-fr 5587 df-we 5589 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6269 df-ord 6330 df-on 6331 df-lim 6332 df-suc 6333 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-om 7821 df-2nd 7946 df-frecs 8235 df-wrecs 8266 df-recs 8315 df-rdg 8353 df-er 8647 df-en 8898 df-dom 8899 df-sdom 8900 df-sup 9359 df-inf 9360 df-pnf 11182 df-mnf 11183 df-xr 11184 df-ltxr 11185 df-le 11186 df-sub 11380 df-neg 11381 df-div 11809 df-nn 12160 df-2 12222 df-n0 12416 df-z 12503 df-uz 12766 df-rp 12920 df-fl 13726 df-mod 13804

This theorem is referenced by: 4sqlem7 16886 4sqlem10 16889

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