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Mirrors > Home > MPE Home > Th. List > Mathboxes > dig2nn0 | Structured version Visualization version GIF version |
Description: A digit of a nonnegative integer 𝑁 in a binary system is either 0 or 1. (Contributed by AV, 24-May-2020.) |
Ref | Expression |
---|---|
dig2nn0 | ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → (𝐾(digit‘2)𝑁) ∈ {0, 1}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2nn 11976 | . . . 4 ⊢ 2 ∈ ℕ | |
2 | 1 | a1i 11 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → 2 ∈ ℕ) |
3 | simpr 484 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → 𝐾 ∈ ℤ) | |
4 | nn0rp0 13116 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ (0[,)+∞)) | |
5 | 4 | adantr 480 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → 𝑁 ∈ (0[,)+∞)) |
6 | digval 45832 | . . 3 ⊢ ((2 ∈ ℕ ∧ 𝐾 ∈ ℤ ∧ 𝑁 ∈ (0[,)+∞)) → (𝐾(digit‘2)𝑁) = ((⌊‘((2↑-𝐾) · 𝑁)) mod 2)) | |
7 | 2, 3, 5, 6 | syl3anc 1369 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → (𝐾(digit‘2)𝑁) = ((⌊‘((2↑-𝐾) · 𝑁)) mod 2)) |
8 | 2re 11977 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
9 | 8 | a1i 11 | . . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → 2 ∈ ℝ) |
10 | 2ne0 12007 | . . . . . . 7 ⊢ 2 ≠ 0 | |
11 | 10 | a1i 11 | . . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → 2 ≠ 0) |
12 | znegcl 12285 | . . . . . . 7 ⊢ (𝐾 ∈ ℤ → -𝐾 ∈ ℤ) | |
13 | 12 | adantl 481 | . . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → -𝐾 ∈ ℤ) |
14 | 9, 11, 13 | reexpclzd 13892 | . . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → (2↑-𝐾) ∈ ℝ) |
15 | nn0re 12172 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℝ) | |
16 | 15 | adantr 480 | . . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → 𝑁 ∈ ℝ) |
17 | 14, 16 | remulcld 10936 | . . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → ((2↑-𝐾) · 𝑁) ∈ ℝ) |
18 | 17 | flcld 13446 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → (⌊‘((2↑-𝐾) · 𝑁)) ∈ ℤ) |
19 | elmod2 44710 | . . 3 ⊢ ((⌊‘((2↑-𝐾) · 𝑁)) ∈ ℤ → ((⌊‘((2↑-𝐾) · 𝑁)) mod 2) ∈ {0, 1}) | |
20 | 18, 19 | syl 17 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → ((⌊‘((2↑-𝐾) · 𝑁)) mod 2) ∈ {0, 1}) |
21 | 7, 20 | eqeltrd 2839 | 1 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐾 ∈ ℤ) → (𝐾(digit‘2)𝑁) ∈ {0, 1}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 {cpr 4560 ‘cfv 6418 (class class class)co 7255 ℝcr 10801 0cc0 10802 1c1 10803 · cmul 10807 +∞cpnf 10937 -cneg 11136 ℕcn 11903 2c2 11958 ℕ0cn0 12163 ℤcz 12249 [,)cico 13010 ⌊cfl 13438 mod cmo 13517 ↑cexp 13710 digitcdig 45829 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-sup 9131 df-inf 9132 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-ico 13014 df-fz 13169 df-fzo 13312 df-fl 13440 df-mod 13518 df-seq 13650 df-exp 13711 df-dig 45830 |
This theorem is referenced by: (None) |
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