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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 45516) 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 12781 | . . 3 ⊢ ℕ = (ℤ≥‘1) | |
| 2 | 1 | a1i 11 | . 2 ⊢ (𝑁 ∈ ℕ → ℕ = (ℤ≥‘1)) |
| 3 | peano2nn 12148 | . . . 4 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ ℕ) | |
| 4 | 3, 1 | eleqtrdi 2843 | . . 3 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ (ℤ≥‘1)) |
| 5 | uzsplit 13503 | . . 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 12144 | . . . . 5 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℂ) | |
| 8 | 1cnd 11118 | . . . . 5 ⊢ (𝑁 ∈ ℕ → 1 ∈ ℂ) | |
| 9 | 7, 8 | pncand 11484 | . . . 4 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) = 𝑁) |
| 10 | 9 | oveq2d 7371 | . . 3 ⊢ (𝑁 ∈ ℕ → (1...((𝑁 + 1) − 1)) = (1...𝑁)) |
| 11 | 10 | uneq1d 4116 | . 2 ⊢ (𝑁 ∈ ℕ → ((1...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1))) = ((1...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
| 12 | 2, 6, 11 | 3eqtrd 2772 | 1 ⊢ (𝑁 ∈ ℕ → ℕ = ((1...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ∪ cun 3896 ‘cfv 6489 (class class class)co 7355 1c1 11018 + caddc 11020 − cmin 11355 ℕcn 12136 ℤ≥cuz 12742 ...cfz 13414 |
| 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 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7677 ax-cnex 11073 ax-resscn 11074 ax-1cn 11075 ax-icn 11076 ax-addcl 11077 ax-addrcl 11078 ax-mulcl 11079 ax-mulrcl 11080 ax-mulcom 11081 ax-addass 11082 ax-mulass 11083 ax-distr 11084 ax-i2m1 11085 ax-1ne0 11086 ax-1rid 11087 ax-rnegex 11088 ax-rrecex 11089 ax-cnre 11090 ax-pre-lttri 11091 ax-pre-lttrn 11092 ax-pre-ltadd 11093 ax-pre-mulgt0 11094 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7312 df-ov 7358 df-oprab 7359 df-mpo 7360 df-om 7806 df-1st 7930 df-2nd 7931 df-frecs 8220 df-wrecs 8251 df-recs 8300 df-rdg 8338 df-er 8631 df-en 8880 df-dom 8881 df-sdom 8882 df-pnf 11159 df-mnf 11160 df-xr 11161 df-ltxr 11162 df-le 11163 df-sub 11357 df-neg 11358 df-nn 12137 df-n0 12393 df-z 12480 df-uz 12743 df-fz 13415 |
| This theorem is referenced by: hoidmvlelem2 46756 |
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