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| Mirrors > Home > MPE Home > Th. List > Mathboxes > oddflALTV | Structured version Visualization version GIF version | ||
| Description: Odd number representation by using the floor function. (Contributed by Glauco Siliprandi, 11-Dec-2019.) (Revised by AV, 18-Jun-2020.) |
| Ref | Expression |
|---|---|
| oddflALTV | ⊢ (𝐾 ∈ Odd → 𝐾 = ((2 · (⌊‘(𝐾 / 2))) + 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zofldiv2ALTV 48581 | . . . 4 ⊢ (𝐾 ∈ Odd → (⌊‘(𝐾 / 2)) = ((𝐾 − 1) / 2)) | |
| 2 | 1 | oveq2d 7430 | . . 3 ⊢ (𝐾 ∈ Odd → (2 · (⌊‘(𝐾 / 2))) = (2 · ((𝐾 − 1) / 2))) |
| 3 | 2 | oveq1d 7429 | . 2 ⊢ (𝐾 ∈ Odd → ((2 · (⌊‘(𝐾 / 2))) + 1) = ((2 · ((𝐾 − 1) / 2)) + 1)) |
| 4 | oddz 48550 | . . . . 5 ⊢ (𝐾 ∈ Odd → 𝐾 ∈ ℤ) | |
| 5 | peano2zm 12664 | . . . . . 6 ⊢ (𝐾 ∈ ℤ → (𝐾 − 1) ∈ ℤ) | |
| 6 | 5 | zcnd 12729 | . . . . 5 ⊢ (𝐾 ∈ ℤ → (𝐾 − 1) ∈ ℂ) |
| 7 | 4, 6 | syl 18 | . . . 4 ⊢ (𝐾 ∈ Odd → (𝐾 − 1) ∈ ℂ) |
| 8 | 2cnd 12346 | . . . 4 ⊢ (𝐾 ∈ Odd → 2 ∈ ℂ) | |
| 9 | 2ne0 12374 | . . . . 5 ⊢ 2 ≠ 0 | |
| 10 | 9 | a1i 11 | . . . 4 ⊢ (𝐾 ∈ Odd → 2 ≠ 0) |
| 11 | 7, 8, 10 | divcan2d 12020 | . . 3 ⊢ (𝐾 ∈ Odd → (2 · ((𝐾 − 1) / 2)) = (𝐾 − 1)) |
| 12 | 11 | oveq1d 7429 | . 2 ⊢ (𝐾 ∈ Odd → ((2 · ((𝐾 − 1) / 2)) + 1) = ((𝐾 − 1) + 1)) |
| 13 | 4 | zcnd 12729 | . . 3 ⊢ (𝐾 ∈ Odd → 𝐾 ∈ ℂ) |
| 14 | npcan1 11666 | . . 3 ⊢ (𝐾 ∈ ℂ → ((𝐾 − 1) + 1) = 𝐾) | |
| 15 | 13, 14 | syl 18 | . 2 ⊢ (𝐾 ∈ Odd → ((𝐾 − 1) + 1) = 𝐾) |
| 16 | 3, 12, 15 | 3eqtrrd 2800 | 1 ⊢ (𝐾 ∈ Odd → 𝐾 = ((2 · (⌊‘(𝐾 / 2))) + 1)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ≠ wne 2955 ‘cfv 6533 (class class class)co 7414 ℂcc 11125 0cc0 11127 1c1 11128 + caddc 11130 · cmul 11132 − cmin 11468 / cdiv 11898 2c2 12322 ℤcz 12618 ⌊cfl 13854 Odd codd 48544 |
| 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 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 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 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9415 df-inf 9416 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-2 12330 df-n0 12532 df-z 12619 df-uz 12891 df-fl 13856 df-odd 48546 |
| This theorem is used by: (None) |
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