Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
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 45507 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ∈ Odd ) → ((𝑁 − 1) / 2) ∈ ℕ0) | |
2 | simpr 485 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) → ((𝑁 − 1) / 2) ∈ ℕ0) | |
3 | oveq2 7345 | . . . . . 6 ⊢ (𝑚 = ((𝑁 − 1) / 2) → (2 · 𝑚) = (2 · ((𝑁 − 1) / 2))) | |
4 | 3 | oveq1d 7352 | . . . . 5 ⊢ (𝑚 = ((𝑁 − 1) / 2) → ((2 · 𝑚) + 1) = ((2 · ((𝑁 − 1) / 2)) + 1)) |
5 | 4 | eqeq2d 2747 | . . . 4 ⊢ (𝑚 = ((𝑁 − 1) / 2) → (𝑁 = ((2 · 𝑚) + 1) ↔ 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1))) |
6 | 5 | adantl 482 | . . 3 ⊢ (((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) ∧ 𝑚 = ((𝑁 − 1) / 2)) → (𝑁 = ((2 · 𝑚) + 1) ↔ 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1))) |
7 | nn0cn 12344 | . . . . . . . 8 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ) | |
8 | peano2cnm 11388 | . . . . . . . 8 ⊢ (𝑁 ∈ ℂ → (𝑁 − 1) ∈ ℂ) | |
9 | 7, 8 | syl 17 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → (𝑁 − 1) ∈ ℂ) |
10 | 2cnd 12152 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → 2 ∈ ℂ) | |
11 | 2ne0 12178 | . . . . . . . 8 ⊢ 2 ≠ 0 | |
12 | 11 | a1i 11 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → 2 ≠ 0) |
13 | 9, 10, 12 | divcan2d 11854 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 → (2 · ((𝑁 − 1) / 2)) = (𝑁 − 1)) |
14 | 13 | oveq1d 7352 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → ((2 · ((𝑁 − 1) / 2)) + 1) = ((𝑁 − 1) + 1)) |
15 | npcan1 11501 | . . . . . 6 ⊢ (𝑁 ∈ ℂ → ((𝑁 − 1) + 1) = 𝑁) | |
16 | 7, 15 | syl 17 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → ((𝑁 − 1) + 1) = 𝑁) |
17 | 14, 16 | eqtr2d 2777 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1)) |
18 | 17 | adantr 481 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) → 𝑁 = ((2 · ((𝑁 − 1) / 2)) + 1)) |
19 | 2, 6, 18 | rspcedvd 3572 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ ((𝑁 − 1) / 2) ∈ ℕ0) → ∃𝑚 ∈ ℕ0 𝑁 = ((2 · 𝑚) + 1)) |
20 | 1, 19 | syldan 591 | 1 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ∈ Odd ) → ∃𝑚 ∈ ℕ0 𝑁 = ((2 · 𝑚) + 1)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1540 ∈ wcel 2105 ≠ wne 2940 ∃wrex 3070 (class class class)co 7337 ℂcc 10970 0cc0 10972 1c1 10973 + caddc 10975 · cmul 10977 − cmin 11306 / cdiv 11733 2c2 12129 ℕ0cn0 12334 Odd codd 45436 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2707 ax-sep 5243 ax-nul 5250 ax-pow 5308 ax-pr 5372 ax-un 7650 ax-resscn 11029 ax-1cn 11030 ax-icn 11031 ax-addcl 11032 ax-addrcl 11033 ax-mulcl 11034 ax-mulrcl 11035 ax-mulcom 11036 ax-addass 11037 ax-mulass 11038 ax-distr 11039 ax-i2m1 11040 ax-1ne0 11041 ax-1rid 11042 ax-rnegex 11043 ax-rrecex 11044 ax-cnre 11045 ax-pre-lttri 11046 ax-pre-lttrn 11047 ax-pre-ltadd 11048 ax-pre-mulgt0 11049 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3349 df-reu 3350 df-rab 3404 df-v 3443 df-sbc 3728 df-csb 3844 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3917 df-nul 4270 df-if 4474 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4853 df-iun 4943 df-br 5093 df-opab 5155 df-mpt 5176 df-tr 5210 df-id 5518 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5575 df-we 5577 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-pred 6238 df-ord 6305 df-on 6306 df-lim 6307 df-suc 6308 df-iota 6431 df-fun 6481 df-fn 6482 df-f 6483 df-f1 6484 df-fo 6485 df-f1o 6486 df-fv 6487 df-riota 7293 df-ov 7340 df-oprab 7341 df-mpo 7342 df-om 7781 df-2nd 7900 df-frecs 8167 df-wrecs 8198 df-recs 8272 df-rdg 8311 df-er 8569 df-en 8805 df-dom 8806 df-sdom 8807 df-pnf 11112 df-mnf 11113 df-xr 11114 df-ltxr 11115 df-le 11116 df-sub 11308 df-neg 11309 df-div 11734 df-nn 12075 df-2 12137 df-n0 12335 df-z 12421 df-even 45437 df-odd 45438 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |