4sqlem6 - Metamath Proof Explorer

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Theorem 4sqlem6 16921

Description: Lemma for 4sq 16942. (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 11184	. . . 4 ⊢ (𝜑 → 0 ∈ ℝ)
2		4sqlem5.2	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℤ)
3	2	zred 12645	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ)
4		4sqlem5.3	. . . . . . . 8 ⊢ (𝜑 → 𝑀 ∈ ℕ)
5	4	nnred 12208	. . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℝ)
6	5	rehalfcld 12436	. . . . . 6 ⊢ (𝜑 → (𝑀 / 2) ∈ ℝ)
7	3, 6	readdcld 11210	. . . . 5 ⊢ (𝜑 → (𝐴 + (𝑀 / 2)) ∈ ℝ)
8	4	nnrpd 13000	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℝ⁺)
9	7, 8	modcld 13844	. . . 4 ⊢ (𝜑 → ((𝐴 + (𝑀 / 2)) mod 𝑀) ∈ ℝ)
10		modge0 13848	. . . . 5 ⊢ (((𝐴 + (𝑀 / 2)) ∈ ℝ ∧ 𝑀 ∈ ℝ⁺) → 0 ≤ ((𝐴 + (𝑀 / 2)) mod 𝑀))
11	7, 8, 10	syl2anc 584	. . . 4 ⊢ (𝜑 → 0 ≤ ((𝐴 + (𝑀 / 2)) mod 𝑀))
12	1, 9, 6, 11	lesub1dd 11801	. . 3 ⊢ (𝜑 → (0 − (𝑀 / 2)) ≤ (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2)))
13		df-neg 11415	. . 3 ⊢ -(𝑀 / 2) = (0 − (𝑀 / 2))
14		4sqlem5.4	. . 3 ⊢ 𝐵 = (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2))
15	12, 13, 14	3brtr4g 5144	. 2 ⊢ (𝜑 → -(𝑀 / 2) ≤ 𝐵)
16		modlt 13849	. . . . . 6 ⊢ (((𝐴 + (𝑀 / 2)) ∈ ℝ ∧ 𝑀 ∈ ℝ⁺) → ((𝐴 + (𝑀 / 2)) mod 𝑀) < 𝑀)
17	7, 8, 16	syl2anc 584	. . . . 5 ⊢ (𝜑 → ((𝐴 + (𝑀 / 2)) mod 𝑀) < 𝑀)
18	4	nncnd 12209	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℂ)
19	18	2halvesd 12435	. . . . 5 ⊢ (𝜑 → ((𝑀 / 2) + (𝑀 / 2)) = 𝑀)
20	17, 19	breqtrrd 5138	. . . 4 ⊢ (𝜑 → ((𝐴 + (𝑀 / 2)) mod 𝑀) < ((𝑀 / 2) + (𝑀 / 2)))
21	9, 6, 6	ltsubaddd 11781	. . . 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 5145	. 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 1540 ∈ wcel 2109 class class class wbr 5110 (class class class)co 7390 ℝcr 11074 0cc0 11075 + caddc 11078 < clt 11215 ≤ cle 11216 − cmin 11412 -cneg 11413 / cdiv 11842 ℕcn 12193 2c2 12248 ℤcz 12536 ℝ⁺crp 12958 mod cmo 13838

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-rmo 3356 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-pss 3937 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-iun 4960 df-br 5111 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5536 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5594 df-we 5596 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-pred 6277 df-ord 6338 df-on 6339 df-lim 6340 df-suc 6341 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7846 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8381 df-er 8674 df-en 8922 df-dom 8923 df-sdom 8924 df-sup 9400 df-inf 9401 df-pnf 11217 df-mnf 11218 df-xr 11219 df-ltxr 11220 df-le 11221 df-sub 11414 df-neg 11415 df-div 11843 df-nn 12194 df-2 12256 df-n0 12450 df-z 12537 df-uz 12801 df-rp 12959 df-fl 13761 df-mod 13839

This theorem is referenced by: 4sqlem7 16922 4sqlem10 16925

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