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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 10297) 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 9720 | . . 3 ⊢ ℕ0 = (ℤ≥‘0) | |
| 2 | 1 | a1i 9 | . 2 ⊢ (𝑁 ∈ ℕ0 → ℕ0 = (ℤ≥‘0)) |
| 3 | peano2nn0 9372 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ0) | |
| 4 | 3, 1 | eleqtrdi 2300 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ (ℤ≥‘0)) |
| 5 | uzsplit 10251 | . . 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 9342 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ) | |
| 8 | pncan1 8486 | . . . . 5 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) − 1) = 𝑁) | |
| 9 | 7, 8 | syl 14 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → ((𝑁 + 1) − 1) = 𝑁) |
| 10 | 9 | oveq2d 5985 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (0...((𝑁 + 1) − 1)) = (0...𝑁)) |
| 11 | 10 | uneq1d 3335 | . 2 ⊢ (𝑁 ∈ ℕ0 → ((0...((𝑁 + 1) − 1)) ∪ (ℤ≥‘(𝑁 + 1))) = ((0...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
| 12 | 2, 6, 11 | 3eqtrd 2244 | 1 ⊢ (𝑁 ∈ ℕ0 → ℕ0 = ((0...𝑁) ∪ (ℤ≥‘(𝑁 + 1)))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1373 ∈ wcel 2178 ∪ cun 3173 ‘cfv 5291 (class class class)co 5969 ℂcc 7960 0cc0 7962 1c1 7963 + caddc 7965 − cmin 8280 ℕ0cn0 9332 ℤ≥cuz 9685 ...cfz 10167 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4179 ax-pow 4235 ax-pr 4270 ax-un 4499 ax-setind 4604 ax-cnex 8053 ax-resscn 8054 ax-1cn 8055 ax-1re 8056 ax-icn 8057 ax-addcl 8058 ax-addrcl 8059 ax-mulcl 8060 ax-addcom 8062 ax-addass 8064 ax-distr 8066 ax-i2m1 8067 ax-0lt1 8068 ax-0id 8070 ax-rnegex 8071 ax-cnre 8073 ax-pre-ltirr 8074 ax-pre-ltwlin 8075 ax-pre-lttrn 8076 ax-pre-ltadd 8078 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ne 2379 df-nel 2474 df-ral 2491 df-rex 2492 df-reu 2493 df-rab 2495 df-v 2779 df-sbc 3007 df-dif 3177 df-un 3179 df-in 3181 df-ss 3188 df-pw 3629 df-sn 3650 df-pr 3651 df-op 3653 df-uni 3866 df-int 3901 df-br 4061 df-opab 4123 df-mpt 4124 df-id 4359 df-xp 4700 df-rel 4701 df-cnv 4702 df-co 4703 df-dm 4704 df-rn 4705 df-res 4706 df-ima 4707 df-iota 5252 df-fun 5293 df-fn 5294 df-f 5295 df-fv 5299 df-riota 5924 df-ov 5972 df-oprab 5973 df-mpo 5974 df-pnf 8146 df-mnf 8147 df-xr 8148 df-ltxr 8149 df-le 8150 df-sub 8282 df-neg 8283 df-inn 9074 df-n0 9333 df-z 9410 df-uz 9686 df-fz 10168 |
| This theorem is referenced by: plycoeid3 15390 |
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