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| Mirrors > Home > MPE Home > Th. List > Mathboxes > nn0onn0exALTV | Structured version Visualization version GIF version | ||
| Description: For each odd nonnegative integer there is a nonnegative integer which, multiplied by 2 and increased by 1, results in the odd nonnegative integer. (Contributed by AV, 30-May-2020.) (Revised by AV, 22-Jun-2020.) |
| Ref | Expression |
|---|---|
| nn0onn0exALTV | ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ∈ Odd ) → ∃𝑚 ∈ ℕ0 𝑁 = ((2 · 𝑚) + 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0oALTV 48323 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ∈ Odd ) → ((𝑁 − 1) / 2) ∈ ℕ0) | |
| 2 | simpr 488 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) → ((𝑁 − 1) / 2) ∈ ℕ0) | |
| 3 | oveq2 7406 | . . . . . 6 ⊢ (𝑚 = ((𝑁 − 1) / 2) → (2 · 𝑚) = (2 · ((𝑁 − 1) / 2))) | |
| 4 | 3 | oveq1d 7413 | . . . . 5 ⊢ (𝑚 = ((𝑁 − 1) / 2) → ((2 · 𝑚) + 1) = ((2 · ((𝑁 − 1) / 2)) + 1)) |
| 5 | 4 | eqeq2d 2775 | . . . 4 ⊢ (𝑚 = ((𝑁 − 1) / 2) → (𝑁 = ((2 · 𝑚) + 1) ↔ 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1))) |
| 6 | 5 | adantl 485 | . . 3 ⊢ (((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) ∧ 𝑚 = ((𝑁 − 1) / 2)) → (𝑁 = ((2 · 𝑚) + 1) ↔ 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1))) |
| 7 | nn0cn 12493 | . . . . . . . 8 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ) | |
| 8 | peano2cnm 11499 | . . . . . . . 8 ⊢ (𝑁 ∈ ℂ → (𝑁 − 1) ∈ ℂ) | |
| 9 | 7, 8 | syl 17 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → (𝑁 − 1) ∈ ℂ) |
| 10 | 2cnd 12298 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → 2 ∈ ℂ) | |
| 11 | 2ne0 12326 | . . . . . . . 8 ⊢ 2 ≠ 0 | |
| 12 | 11 | a1i 11 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → 2 ≠ 0) |
| 13 | 9, 10, 12 | divcan2d 11971 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 → (2 · ((𝑁 − 1) / 2)) = (𝑁 − 1)) |
| 14 | 13 | oveq1d 7413 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → ((2 · ((𝑁 − 1) / 2)) + 1) = ((𝑁 − 1) + 1)) |
| 15 | npcan1 11614 | . . . . . 6 ⊢ (𝑁 ∈ ℂ → ((𝑁 − 1) + 1) = 𝑁) | |
| 16 | 7, 15 | syl 17 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → ((𝑁 − 1) + 1) = 𝑁) |
| 17 | 14, 16 | eqtr2d 2800 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1)) |
| 18 | 17 | adantr 484 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) → 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1)) |
| 19 | 2, 6, 18 | rspcedvd 3585 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) → ∃𝑚 ∈ ℕ0 𝑁 = ((2 · 𝑚) + 1)) |
| 20 | 1, 19 | syldan 600 | 1 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ∈ Odd ) → ∃𝑚 ∈ ℕ0 𝑁 = ((2 · 𝑚) + 1)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 = wceq 1562 ∈ wcel 2144 ≠ wne 2959 ∃wrex 3088 (class class class)co 7398 ℂcc 11073 0cc0 11075 1c1 11076 + caddc 11078 · cmul 11080 − cmin 11416 / cdiv 11846 2c2 12274 ℕ0cn0 12483 Odd codd 48252 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 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 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5544 df-eprel 5549 df-po 5557 df-so 5558 df-fr 5602 df-we 5604 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-pred 6290 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-riota 7355 df-ov 7401 df-oprab 7402 df-mpo 7403 df-om 7849 df-2nd 7973 df-frecs 8264 df-wrecs 8295 df-recs 8344 df-rdg 8383 df-er 8680 df-en 8930 df-dom 8931 df-sdom 8932 df-pnf 11220 df-mnf 11221 df-xr 11222 df-ltxr 11223 df-le 11224 df-sub 11418 df-neg 11419 df-div 11847 df-nn 12213 df-2 12282 df-n0 12484 df-z 12571 df-even 48253 df-odd 48254 |
| This theorem is referenced by: (None) |
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