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Mirrors > Home > MPE Home > Th. List > Mathboxes > bits0ALTV | Structured version Visualization version GIF version |
Description: Value of the zeroth bit. (Contributed by Mario Carneiro, 5-Sep-2016.) (Revised by AV, 19-Jun-2020.) |
Ref | Expression |
---|---|
bits0ALTV | ⊢ (𝑁 ∈ ℤ → (0 ∈ (bits‘𝑁) ↔ 𝑁 ∈ Odd )) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0nn0 11900 | . . 3 ⊢ 0 ∈ ℕ0 | |
2 | bitsval2 15764 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 0 ∈ ℕ0) → (0 ∈ (bits‘𝑁) ↔ ¬ 2 ∥ (⌊‘(𝑁 / (2↑0))))) | |
3 | 1, 2 | mpan2 690 | . 2 ⊢ (𝑁 ∈ ℤ → (0 ∈ (bits‘𝑁) ↔ ¬ 2 ∥ (⌊‘(𝑁 / (2↑0))))) |
4 | 2cn 11700 | . . . . . . . . 9 ⊢ 2 ∈ ℂ | |
5 | exp0 13429 | . . . . . . . . 9 ⊢ (2 ∈ ℂ → (2↑0) = 1) | |
6 | 4, 5 | ax-mp 5 | . . . . . . . 8 ⊢ (2↑0) = 1 |
7 | 6 | oveq2i 7146 | . . . . . . 7 ⊢ (𝑁 / (2↑0)) = (𝑁 / 1) |
8 | zcn 11974 | . . . . . . . 8 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
9 | 8 | div1d 11397 | . . . . . . 7 ⊢ (𝑁 ∈ ℤ → (𝑁 / 1) = 𝑁) |
10 | 7, 9 | syl5eq 2845 | . . . . . 6 ⊢ (𝑁 ∈ ℤ → (𝑁 / (2↑0)) = 𝑁) |
11 | 10 | fveq2d 6649 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (⌊‘(𝑁 / (2↑0))) = (⌊‘𝑁)) |
12 | flid 13173 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (⌊‘𝑁) = 𝑁) | |
13 | 11, 12 | eqtrd 2833 | . . . 4 ⊢ (𝑁 ∈ ℤ → (⌊‘(𝑁 / (2↑0))) = 𝑁) |
14 | 13 | breq2d 5042 | . . 3 ⊢ (𝑁 ∈ ℤ → (2 ∥ (⌊‘(𝑁 / (2↑0))) ↔ 2 ∥ 𝑁)) |
15 | 14 | notbid 321 | . 2 ⊢ (𝑁 ∈ ℤ → (¬ 2 ∥ (⌊‘(𝑁 / (2↑0))) ↔ ¬ 2 ∥ 𝑁)) |
16 | isodd3 44170 | . . 3 ⊢ (𝑁 ∈ Odd ↔ (𝑁 ∈ ℤ ∧ ¬ 2 ∥ 𝑁)) | |
17 | 16 | baibr 540 | . 2 ⊢ (𝑁 ∈ ℤ → (¬ 2 ∥ 𝑁 ↔ 𝑁 ∈ Odd )) |
18 | 3, 15, 17 | 3bitrd 308 | 1 ⊢ (𝑁 ∈ ℤ → (0 ∈ (bits‘𝑁) ↔ 𝑁 ∈ Odd )) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 = wceq 1538 ∈ wcel 2111 class class class wbr 5030 ‘cfv 6324 (class class class)co 7135 ℂcc 10524 0cc0 10526 1c1 10527 / cdiv 11286 2c2 11680 ℕ0cn0 11885 ℤcz 11969 ⌊cfl 13155 ↑cexp 13425 ∥ cdvds 15599 bitscbits 15758 Odd codd 44143 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 ax-pre-sup 10604 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rmo 3114 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-om 7561 df-wrecs 7930 df-recs 7991 df-rdg 8029 df-er 8272 df-en 8493 df-dom 8494 df-sdom 8495 df-sup 8890 df-inf 8891 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-div 11287 df-nn 11626 df-2 11688 df-n0 11886 df-z 11970 df-uz 12232 df-fl 13157 df-seq 13365 df-exp 13426 df-dvds 15600 df-bits 15761 df-odd 44145 |
This theorem is referenced by: bits0eALTV 44198 bits0oALTV 44199 |
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