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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > nnsplit | Structured version Visualization version GIF version |
Description: Express the set of positive integers as the disjoint (see nnuzdisj 40087) union of the first 𝑁 values and the rest. (Contributed by Glauco Siliprandi, 21-Nov-2020.) |
Ref | Expression |
---|---|
nnsplit | ⊢ (𝑁 ∈ ℕ → ℕ = ((1...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnuz 11925 | . . 3 ⊢ ℕ = (ℤ≥‘1) | |
2 | 1 | a1i 11 | . 2 ⊢ (𝑁 ∈ ℕ → ℕ = (ℤ≥‘1)) |
3 | peano2nn 11234 | . . . 4 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ ℕ) | |
4 | 3, 1 | syl6eleq 2860 | . . 3 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ (ℤ≥‘1)) |
5 | uzsplit 12619 | . . 3 ⊢ ((𝑁 + 1) ∈ (ℤ≥‘1) → (ℤ≥‘1) = ((1...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1)))) | |
6 | 4, 5 | syl 17 | . 2 ⊢ (𝑁 ∈ ℕ → (ℤ≥‘1) = ((1...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1)))) |
7 | nncn 11230 | . . . . 5 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℂ) | |
8 | 1cnd 10258 | . . . . 5 ⊢ (𝑁 ∈ ℕ → 1 ∈ ℂ) | |
9 | 7, 8 | pncand 10595 | . . . 4 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) = 𝑁) |
10 | 9 | oveq2d 6809 | . . 3 ⊢ (𝑁 ∈ ℕ → (1...((𝑁 + 1) − 1)) = (1...𝑁)) |
11 | 10 | uneq1d 3917 | . 2 ⊢ (𝑁 ∈ ℕ → ((1...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1))) = ((1...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
12 | 2, 6, 11 | 3eqtrd 2809 | 1 ⊢ (𝑁 ∈ ℕ → ℕ = ((1...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1631 ∈ wcel 2145 ∪ cun 3721 ‘cfv 6031 (class class class)co 6793 1c1 10139 + caddc 10141 − cmin 10468 ℕcn 11222 ℤ≥cuz 11888 ...cfz 12533 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1870 ax-4 1885 ax-5 1991 ax-6 2057 ax-7 2093 ax-8 2147 ax-9 2154 ax-10 2174 ax-11 2190 ax-12 2203 ax-13 2408 ax-ext 2751 ax-sep 4915 ax-nul 4923 ax-pow 4974 ax-pr 5034 ax-un 7096 ax-cnex 10194 ax-resscn 10195 ax-1cn 10196 ax-icn 10197 ax-addcl 10198 ax-addrcl 10199 ax-mulcl 10200 ax-mulrcl 10201 ax-mulcom 10202 ax-addass 10203 ax-mulass 10204 ax-distr 10205 ax-i2m1 10206 ax-1ne0 10207 ax-1rid 10208 ax-rnegex 10209 ax-rrecex 10210 ax-cnre 10211 ax-pre-lttri 10212 ax-pre-lttrn 10213 ax-pre-ltadd 10214 ax-pre-mulgt0 10215 |
This theorem depends on definitions: df-bi 197 df-an 383 df-or 837 df-3or 1072 df-3an 1073 df-tru 1634 df-ex 1853 df-nf 1858 df-sb 2050 df-eu 2622 df-mo 2623 df-clab 2758 df-cleq 2764 df-clel 2767 df-nfc 2902 df-ne 2944 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rab 3070 df-v 3353 df-sbc 3588 df-csb 3683 df-dif 3726 df-un 3728 df-in 3730 df-ss 3737 df-pss 3739 df-nul 4064 df-if 4226 df-pw 4299 df-sn 4317 df-pr 4319 df-tp 4321 df-op 4323 df-uni 4575 df-iun 4656 df-br 4787 df-opab 4847 df-mpt 4864 df-tr 4887 df-id 5157 df-eprel 5162 df-po 5170 df-so 5171 df-fr 5208 df-we 5210 df-xp 5255 df-rel 5256 df-cnv 5257 df-co 5258 df-dm 5259 df-rn 5260 df-res 5261 df-ima 5262 df-pred 5823 df-ord 5869 df-on 5870 df-lim 5871 df-suc 5872 df-iota 5994 df-fun 6033 df-fn 6034 df-f 6035 df-f1 6036 df-fo 6037 df-f1o 6038 df-fv 6039 df-riota 6754 df-ov 6796 df-oprab 6797 df-mpt2 6798 df-om 7213 df-1st 7315 df-2nd 7316 df-wrecs 7559 df-recs 7621 df-rdg 7659 df-er 7896 df-en 8110 df-dom 8111 df-sdom 8112 df-pnf 10278 df-mnf 10279 df-xr 10280 df-ltxr 10281 df-le 10282 df-sub 10470 df-neg 10471 df-nn 11223 df-n0 11495 df-z 11580 df-uz 11889 df-fz 12534 |
This theorem is referenced by: hoidmvlelem2 41330 |
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