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| Mirrors > Home > ILE Home > Th. List > nn0split | GIF version | ||
| Description: Express the set of nonnegative integers as the disjoint (see nn0disj 10351) union of the first 𝑁 + 1 values and the rest. (Contributed by AV, 8-Nov-2019.) |
| Ref | Expression |
|---|---|
| nn0split | ⊢ (𝑁 ∈ ℕ0 → ℕ0 = ((0...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0uz 9774 | . . 3 ⊢ ℕ0 = (ℤ≥‘0) | |
| 2 | 1 | a1i 9 | . 2 ⊢ (𝑁 ∈ ℕ0 → ℕ0 = (ℤ≥‘0)) |
| 3 | peano2nn0 9425 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ0) | |
| 4 | 3, 1 | eleqtrdi 2322 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ (ℤ≥‘0)) |
| 5 | uzsplit 10305 | . . 3 ⊢ ((𝑁 + 1) ∈ (ℤ≥‘0) → (ℤ≥‘0) = ((0...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1)))) | |
| 6 | 4, 5 | syl 14 | . 2 ⊢ (𝑁 ∈ ℕ0 → (ℤ≥‘0) = ((0...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1)))) |
| 7 | nn0cn 9395 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ) | |
| 8 | pncan1 8539 | . . . . 5 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) − 1) = 𝑁) | |
| 9 | 7, 8 | syl 14 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → ((𝑁 + 1) − 1) = 𝑁) |
| 10 | 9 | oveq2d 6026 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (0...((𝑁 + 1) − 1)) = (0...𝑁)) |
| 11 | 10 | uneq1d 3357 | . 2 ⊢ (𝑁 ∈ ℕ0 → ((0...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1))) = ((0...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
| 12 | 2, 6, 11 | 3eqtrd 2266 | 1 ⊢ (𝑁 ∈ ℕ0 → ℕ0 = ((0...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 ∪ cun 3195 ‘cfv 5321 (class class class)co 6010 ℂcc 8013 0cc0 8015 1c1 8016 + caddc 8018 − cmin 8333 ℕ0cn0 9385 ℤ≥cuz 9738 ...cfz 10221 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4259 ax-pr 4294 ax-un 4525 ax-setind 4630 ax-cnex 8106 ax-resscn 8107 ax-1cn 8108 ax-1re 8109 ax-icn 8110 ax-addcl 8111 ax-addrcl 8112 ax-mulcl 8113 ax-addcom 8115 ax-addass 8117 ax-distr 8119 ax-i2m1 8120 ax-0lt1 8121 ax-0id 8123 ax-rnegex 8124 ax-cnre 8126 ax-pre-ltirr 8127 ax-pre-ltwlin 8128 ax-pre-lttrn 8129 ax-pre-ltadd 8131 |
| This theorem depends on definitions: df-bi 117 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-br 4084 df-opab 4146 df-mpt 4147 df-id 4385 df-xp 4726 df-rel 4727 df-cnv 4728 df-co 4729 df-dm 4730 df-rn 4731 df-res 4732 df-ima 4733 df-iota 5281 df-fun 5323 df-fn 5324 df-f 5325 df-fv 5329 df-riota 5963 df-ov 6013 df-oprab 6014 df-mpo 6015 df-pnf 8199 df-mnf 8200 df-xr 8201 df-ltxr 8202 df-le 8203 df-sub 8335 df-neg 8336 df-inn 9127 df-n0 9386 df-z 9463 df-uz 9739 df-fz 10222 |
| This theorem is referenced by: plycoeid3 15452 |
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