hoiqssbllem1 - Mathbox for Glauco Siliprandi

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Theorem hoiqssbllem1 45016

Description: The center of the n-dimensional ball belongs to the half-open interval. (Contributed by Glauco Siliprandi, 24-Dec-2020.)

**Hypotheses**
Ref	Expression
hoiqssbllem1.i	⊢ Ⅎ𝑖𝜑
hoiqssbllem1.x	⊢ (𝜑 → 𝑋 ∈ Fin)
hoiqssbllem1.n	⊢ (𝜑 → 𝑋 ≠ ∅)
hoiqssbllem1.y	⊢ (𝜑 → 𝑌 ∈ (ℝ ↑_m 𝑋))
hoiqssbllem1.c	⊢ (𝜑 → 𝐶:𝑋⟶ℝ)
hoiqssbllem1.d	⊢ (𝜑 → 𝐷:𝑋⟶ℝ)
hoiqssbllem1.e	⊢ (𝜑 → 𝐸 ∈ ℝ⁺)
hoiqssbllem1.l	⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐶‘𝑖) ∈ (((𝑌‘𝑖) − (𝐸 / (2 · (√‘(♯‘𝑋)))))(,)(𝑌‘𝑖)))
hoiqssbllem1.r	⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐷‘𝑖) ∈ ((𝑌‘𝑖)(,)((𝑌‘𝑖) + (𝐸 / (2 · (√‘(♯‘𝑋)))))))

**Assertion**
Ref	Expression
hoiqssbllem1	⊢ (𝜑 → 𝑌 ∈ X𝑖 ∈ 𝑋 ((𝐶‘𝑖)[,)(𝐷‘𝑖)))

Distinct variable groups: 𝑖,𝑋 𝑖,𝑌 Allowed substitution hints: 𝜑(𝑖) 𝐶(𝑖) 𝐷(𝑖) 𝐸(𝑖)

**Proof of Theorem hoiqssbllem1**
Step	Hyp	Ref	Expression
1		hoiqssbllem1.y	. . . 4 ⊢ (𝜑 → 𝑌 ∈ (ℝ ↑_m 𝑋))
2	1	elexd 3479	. . 3 ⊢ (𝜑 → 𝑌 ∈ V)
3		elmapfn 8825	. . . 4 ⊢ (𝑌 ∈ (ℝ ↑_m 𝑋) → 𝑌 Fn 𝑋)
4	1, 3	syl 17	. . 3 ⊢ (𝜑 → 𝑌 Fn 𝑋)
5		hoiqssbllem1.i	. . . 4 ⊢ Ⅎ𝑖𝜑
6		hoiqssbllem1.c	. . . . . . . 8 ⊢ (𝜑 → 𝐶:𝑋⟶ℝ)
7	6	ffvelcdmda 7055	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐶‘𝑖) ∈ ℝ)
8	7	rexrd 11229	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐶‘𝑖) ∈ ℝ^*)
9		hoiqssbllem1.d	. . . . . . . 8 ⊢ (𝜑 → 𝐷:𝑋⟶ℝ)
10	9	ffvelcdmda 7055	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐷‘𝑖) ∈ ℝ)
11	10	rexrd 11229	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐷‘𝑖) ∈ ℝ^*)
12		elmapi 8809	. . . . . . . . 9 ⊢ (𝑌 ∈ (ℝ ↑_m 𝑋) → 𝑌:𝑋⟶ℝ)
13	1, 12	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑌:𝑋⟶ℝ)
14	13	ffvelcdmda 7055	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝑌‘𝑖) ∈ ℝ)
15	14	rexrd 11229	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝑌‘𝑖) ∈ ℝ^*)
16		hoiqssbllem1.e	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐸 ∈ ℝ⁺)
17		2rp 12944	. . . . . . . . . . . . . . 15 ⊢ 2 ∈ ℝ⁺
18	17	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 2 ∈ ℝ⁺)
19		hoiqssbllem1.n	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → 𝑋 ≠ ∅)
20		hoiqssbllem1.x	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝑋 ∈ Fin)
21		hashnncl 14291	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑋 ∈ Fin → ((♯‘𝑋) ∈ ℕ ↔ 𝑋 ≠ ∅))
22	20, 21	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → ((♯‘𝑋) ∈ ℕ ↔ 𝑋 ≠ ∅))
23	19, 22	mpbird 256	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (♯‘𝑋) ∈ ℕ)
24	23	nnred 12192	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (♯‘𝑋) ∈ ℝ)
25	23	nngt0d 12226	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 0 < (♯‘𝑋))
26	24, 25	elrpd 12978	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (♯‘𝑋) ∈ ℝ⁺)
27	26	rpsqrtcld 15323	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (√‘(♯‘𝑋)) ∈ ℝ⁺)
28	18, 27	rpmulcld 12997	. . . . . . . . . . . . 13 ⊢ (𝜑 → (2 · (√‘(♯‘𝑋))) ∈ ℝ⁺)
29	16, 28	rpdivcld 12998	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐸 / (2 · (√‘(♯‘𝑋)))) ∈ ℝ⁺)
30	29	rpred 12981	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐸 / (2 · (√‘(♯‘𝑋)))) ∈ ℝ)
31	30	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐸 / (2 · (√‘(♯‘𝑋)))) ∈ ℝ)
32	14, 31	resubcld 11607	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → ((𝑌‘𝑖) − (𝐸 / (2 · (√‘(♯‘𝑋))))) ∈ ℝ)
33	32	rexrd 11229	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → ((𝑌‘𝑖) − (𝐸 / (2 · (√‘(♯‘𝑋))))) ∈ ℝ^*)
34		hoiqssbllem1.l	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐶‘𝑖) ∈ (((𝑌‘𝑖) − (𝐸 / (2 · (√‘(♯‘𝑋)))))(,)(𝑌‘𝑖)))
35		iooltub 43901	. . . . . . . 8 ⊢ ((((𝑌‘𝑖) − (𝐸 / (2 · (√‘(♯‘𝑋))))) ∈ ℝ^* ∧ (𝑌‘𝑖) ∈ ℝ^* ∧ (𝐶‘𝑖) ∈ (((𝑌‘𝑖) − (𝐸 / (2 · (√‘(♯‘𝑋)))))(,)(𝑌‘𝑖))) → (𝐶‘𝑖) < (𝑌‘𝑖))
36	33, 15, 34, 35	syl3anc 1371	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐶‘𝑖) < (𝑌‘𝑖))
37	7, 14, 36	ltled 11327	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐶‘𝑖) ≤ (𝑌‘𝑖))
38	14, 31	readdcld 11208	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → ((𝑌‘𝑖) + (𝐸 / (2 · (√‘(♯‘𝑋))))) ∈ ℝ)
39	38	rexrd 11229	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → ((𝑌‘𝑖) + (𝐸 / (2 · (√‘(♯‘𝑋))))) ∈ ℝ^*)
40		hoiqssbllem1.r	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝐷‘𝑖) ∈ ((𝑌‘𝑖)(,)((𝑌‘𝑖) + (𝐸 / (2 · (√‘(♯‘𝑋)))))))
41		ioogtlb 43886	. . . . . . 7 ⊢ (((𝑌‘𝑖) ∈ ℝ^* ∧ ((𝑌‘𝑖) + (𝐸 / (2 · (√‘(♯‘𝑋))))) ∈ ℝ^* ∧ (𝐷‘𝑖) ∈ ((𝑌‘𝑖)(,)((𝑌‘𝑖) + (𝐸 / (2 · (√‘(♯‘𝑋))))))) → (𝑌‘𝑖) < (𝐷‘𝑖))
42	15, 39, 40, 41	syl3anc 1371	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝑌‘𝑖) < (𝐷‘𝑖))
43	8, 11, 15, 37, 42	elicod 13339	. . . . 5 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑋) → (𝑌‘𝑖) ∈ ((𝐶‘𝑖)[,)(𝐷‘𝑖)))
44	43	ex 413	. . . 4 ⊢ (𝜑 → (𝑖 ∈ 𝑋 → (𝑌‘𝑖) ∈ ((𝐶‘𝑖)[,)(𝐷‘𝑖))))
45	5, 44	ralrimi 3251	. . 3 ⊢ (𝜑 → ∀𝑖 ∈ 𝑋 (𝑌‘𝑖) ∈ ((𝐶‘𝑖)[,)(𝐷‘𝑖)))
46	2, 4, 45	3jca 1128	. 2 ⊢ (𝜑 → (𝑌 ∈ V ∧ 𝑌 Fn 𝑋 ∧ ∀𝑖 ∈ 𝑋 (𝑌‘𝑖) ∈ ((𝐶‘𝑖)[,)(𝐷‘𝑖))))
47		elixp2 8861	. 2 ⊢ (𝑌 ∈ X𝑖 ∈ 𝑋 ((𝐶‘𝑖)[,)(𝐷‘𝑖)) ↔ (𝑌 ∈ V ∧ 𝑌 Fn 𝑋 ∧ ∀𝑖 ∈ 𝑋 (𝑌‘𝑖) ∈ ((𝐶‘𝑖)[,)(𝐷‘𝑖))))
48	46, 47	sylibr 233	1 ⊢ (𝜑 → 𝑌 ∈ X𝑖 ∈ 𝑋 ((𝐶‘𝑖)[,)(𝐷‘𝑖)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 Ⅎwnf 1785 ∈ wcel 2106 ≠ wne 2939 ∀wral 3060 Vcvv 3459 ∅c0 4302 class class class wbr 5125 Fn wfn 6511 ⟶wf 6512 ‘cfv 6516 (class class class)co 7377 ↑_m cmap 8787 Xcixp 8857 Fincfn 8905 ℝcr 11074 + caddc 11078 · cmul 11080 ℝ^*cxr 11212 < clt 11213 − cmin 11409 / cdiv 11836 ℕcn 12177 2c2 12232 ℝ⁺crp 12939 (,)cioo 13289 [,)cico 13291 ♯chash 14255 √csqrt 15145

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2702 ax-sep 5276 ax-nul 5283 ax-pow 5340 ax-pr 5404 ax-un 7692 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 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3364 df-reu 3365 df-rab 3419 df-v 3461 df-sbc 3758 df-csb 3874 df-dif 3931 df-un 3933 df-in 3935 df-ss 3945 df-pss 3947 df-nul 4303 df-if 4507 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4886 df-int 4928 df-iun 4976 df-br 5126 df-opab 5188 df-mpt 5209 df-tr 5243 df-id 5551 df-eprel 5557 df-po 5565 df-so 5566 df-fr 5608 df-we 5610 df-xp 5659 df-rel 5660 df-cnv 5661 df-co 5662 df-dm 5663 df-rn 5664 df-res 5665 df-ima 5666 df-pred 6273 df-ord 6340 df-on 6341 df-lim 6342 df-suc 6343 df-iota 6468 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-riota 7333 df-ov 7380 df-oprab 7381 df-mpo 7382 df-om 7823 df-1st 7941 df-2nd 7942 df-frecs 8232 df-wrecs 8263 df-recs 8337 df-rdg 8376 df-1o 8432 df-er 8670 df-map 8789 df-ixp 8858 df-en 8906 df-dom 8907 df-sdom 8908 df-fin 8909 df-sup 9402 df-card 9899 df-pnf 11215 df-mnf 11216 df-xr 11217 df-ltxr 11218 df-le 11219 df-sub 11411 df-neg 11412 df-div 11837 df-nn 12178 df-2 12240 df-3 12241 df-n0 12438 df-z 12524 df-uz 12788 df-rp 12940 df-ioo 13293 df-ico 13295 df-fz 13450 df-seq 13932 df-exp 13993 df-hash 14256 df-cj 15011 df-re 15012 df-im 15013 df-sqrt 15147

This theorem is referenced by: hoiqssbllem3 45018

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