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| Mirrors > Home > ILE Home > Th. List > fzctr | GIF version | ||
| Description: Lemma for theorems about the central binomial coefficient. (Contributed by Mario Carneiro, 8-Mar-2014.) (Revised by Mario Carneiro, 2-Aug-2014.) |
| Ref | Expression |
|---|---|
| fzctr | ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ (0...(2 · 𝑁))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0ge0 9470 | . 2 ⊢ (𝑁 ∈ ℕ0 → 0 ≤ 𝑁) | |
| 2 | nn0re 9454 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℝ) | |
| 3 | nn0addge1 9491 | . . . 4 ⊢ ((𝑁 ∈ ℝ ∧ 𝑁 ∈ ℕ0) → 𝑁 ≤ (𝑁 + 𝑁)) | |
| 4 | 2, 3 | mpancom 422 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ≤ (𝑁 + 𝑁)) |
| 5 | nn0cn 9455 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ) | |
| 6 | 5 | 2timesd 9430 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (2 · 𝑁) = (𝑁 + 𝑁)) |
| 7 | 4, 6 | breqtrrd 4121 | . 2 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ≤ (2 · 𝑁)) |
| 8 | nn0z 9542 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℤ) | |
| 9 | 0zd 9534 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 0 ∈ ℤ) | |
| 10 | 2z 9550 | . . . 4 ⊢ 2 ∈ ℤ | |
| 11 | zmulcl 9576 | . . . 4 ⊢ ((2 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (2 · 𝑁) ∈ ℤ) | |
| 12 | 10, 8, 11 | sylancr 414 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (2 · 𝑁) ∈ ℤ) |
| 13 | elfz 10292 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 0 ∈ ℤ ∧ (2 · 𝑁) ∈ ℤ) → (𝑁 ∈ (0...(2 · 𝑁)) ↔ (0 ≤ 𝑁 ∧ 𝑁 ≤ (2 · 𝑁)))) | |
| 14 | 8, 9, 12, 13 | syl3anc 1274 | . 2 ⊢ (𝑁 ∈ ℕ0 → (𝑁 ∈ (0...(2 · 𝑁)) ↔ (0 ≤ 𝑁 ∧ 𝑁 ≤ (2 · 𝑁)))) |
| 15 | 1, 7, 14 | mpbir2and 953 | 1 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ (0...(2 · 𝑁))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2202 class class class wbr 4093 (class class class)co 6028 ℝcr 8074 0cc0 8075 + caddc 8078 · cmul 8080 ≤ cle 8258 2c2 9237 ℕ0cn0 9445 ℤcz 9522 ...cfz 10286 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-mulrcl 8174 ax-addcom 8175 ax-mulcom 8176 ax-addass 8177 ax-mulass 8178 ax-distr 8179 ax-i2m1 8180 ax-0lt1 8181 ax-1rid 8182 ax-0id 8183 ax-rnegex 8184 ax-cnre 8186 ax-pre-ltirr 8187 ax-pre-ltwlin 8188 ax-pre-lttrn 8189 ax-pre-ltadd 8191 |
| This theorem depends on definitions: df-bi 117 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-reu 2518 df-rab 2520 df-v 2805 df-sbc 3033 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-br 4094 df-opab 4156 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-iota 5293 df-fun 5335 df-fv 5341 df-riota 5981 df-ov 6031 df-oprab 6032 df-mpo 6033 df-pnf 8259 df-mnf 8260 df-xr 8261 df-ltxr 8262 df-le 8263 df-sub 8395 df-neg 8396 df-inn 9187 df-2 9245 df-n0 9446 df-z 9523 df-fz 10287 |
| This theorem is referenced by: (None) |
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