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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dya2iocress | Structured version Visualization version GIF version | ||
| Description: Dyadic intervals are subsets of ℝ. (Contributed by Thierry Arnoux, 18-Sep-2017.) |
| Ref | Expression |
|---|---|
| sxbrsiga.0 | ⊢ 𝐽 = (topGen‘ran (,)) |
| dya2ioc.1 | ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) |
| Ref | Expression |
|---|---|
| dya2iocress | ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋𝐼𝑁) ⊆ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sxbrsiga.0 | . . 3 ⊢ 𝐽 = (topGen‘ran (,)) | |
| 2 | dya2ioc.1 | . . 3 ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) | |
| 3 | 1, 2 | dya2iocival 34888 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋𝐼𝑁) = ((𝑋 / (2↑𝑁))[,)((𝑋 + 1) / (2↑𝑁)))) |
| 4 | simpr 490 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 𝑋 ∈ ℤ) | |
| 5 | 4 | zred 12784 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 𝑋 ∈ ℝ) |
| 6 | 2rp 13106 | . . . . . 6 ⊢ 2 ∈ ℝ+ | |
| 7 | 6 | a1i 11 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 2 ∈ ℝ+) |
| 8 | simpl 488 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 𝑁 ∈ ℤ) | |
| 9 | 7, 8 | rpexpcld 14371 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (2↑𝑁) ∈ ℝ+) |
| 10 | 5, 9 | rerpdivcld 13176 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋 / (2↑𝑁)) ∈ ℝ) |
| 11 | 1red 11290 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 1 ∈ ℝ) | |
| 12 | 5, 11 | readdcld 11319 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋 + 1) ∈ ℝ) |
| 13 | 12, 9 | rerpdivcld 13176 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → ((𝑋 + 1) / (2↑𝑁)) ∈ ℝ) |
| 14 | 13 | rexrd 11340 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → ((𝑋 + 1) / (2↑𝑁)) ∈ ℝ*) |
| 15 | icossre 13540 | . . 3 ⊢ (((𝑋 / (2↑𝑁)) ∈ ℝ ∧ ((𝑋 + 1) / (2↑𝑁)) ∈ ℝ*) → ((𝑋 / (2↑𝑁))[,)((𝑋 + 1) / (2↑𝑁))) ⊆ ℝ) | |
| 16 | 10, 14, 15 | syl2anc 596 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → ((𝑋 / (2↑𝑁))[,)((𝑋 + 1) / (2↑𝑁))) ⊆ ℝ) |
| 17 | 3, 16 | eqsstrd 3965 | 1 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋𝐼𝑁) ⊆ ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ⊆ wss 3899 ran crn 5652 ‘cfv 6531 (class class class)co 7412 ∈ cmpo 7414 ℝcr 11180 1c1 11182 + caddc 11184 ℝ*cxr 11323 / cdiv 11954 2c2 12378 ℤcz 12674 ℝ+crp 13101 (,)cioo 13457 [,)cico 13459 ↑cexp 14184 topGenctg 17588 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8701 df-en 8958 df-dom 8959 df-sdom 8960 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-div 11955 df-nn 12317 df-2 12386 df-n0 12588 df-z 12675 df-uz 12947 df-rp 13102 df-ico 13463 df-seq 14125 df-exp 14185 |
| This theorem is used by: (None) |
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