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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 9600 | . 2 ⊢ (𝑁 ∈ ℕ0 → 0 ≤ 𝑁) | |
| 2 | nn0re 9584 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℝ) | |
| 3 | nn0addge1 9621 | . . . 4 ⊢ ((𝑁 ∈ ℝ ∧ 𝑁 ∈ ℕ0) → 𝑁 ≤ (𝑁 + 𝑁)) | |
| 4 | 2, 3 | mpancom 426 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ≤ (𝑁 + 𝑁)) |
| 5 | nn0cn 9585 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ) | |
| 6 | 5 | 2timesd 9560 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (2 · 𝑁) = (𝑁 + 𝑁)) |
| 7 | 4, 6 | breqtrrd 4159 | . 2 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ≤ (2 · 𝑁)) |
| 8 | nn0z 9676 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℤ) | |
| 9 | 0zd 9668 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 0 ∈ ℤ) | |
| 10 | 2z 9684 | . . . 4 ⊢ 2 ∈ ℤ | |
| 11 | zmulcl 9710 | . . . 4 ⊢ ((2 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (2 · 𝑁) ∈ ℤ) | |
| 12 | 10, 8, 11 | sylancr 418 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (2 · 𝑁) ∈ ℤ) |
| 13 | elfz 10435 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 0 ∈ ℤ ∧ (2 · 𝑁) ∈ ℤ) → (𝑁 ∈ (0...(2 · 𝑁)) ↔ (0 ≤ 𝑁 ∧ 𝑁 ≤ (2 · 𝑁)))) | |
| 14 | 8, 9, 12, 13 | syl3anc 1278 | . 2 ⊢ (𝑁 ∈ ℕ0 → (𝑁 ∈ (0...(2 · 𝑁)) ↔ (0 ≤ 𝑁 ∧ 𝑁 ≤ (2 · 𝑁)))) |
| 15 | 1, 7, 14 | mpbir2and 957 | 1 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ (0...(2 · 𝑁))) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2209 class class class wbr 4131 (class class class)co 6088 ℝcr 8185 0cc0 8186 + caddc 8189 · cmul 8191 ≤ cle 8368 2c2 9365 ℕ0cn0 9575 ℤcz 9656 ...cfz 10429 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8277 ax-resscn 8278 ax-1cn 8279 ax-1re 8280 ax-icn 8281 ax-addcl 8282 ax-addrcl 8283 ax-mulcl 8284 ax-mulrcl 8285 ax-addcom 8286 ax-mulcom 8287 ax-addass 8288 ax-mulass 8289 ax-distr 8290 ax-i2m1 8291 ax-0lt1 8292 ax-1rid 8293 ax-0id 8294 ax-rnegex 8295 ax-cnre 8297 ax-pre-ltirr 8298 ax-pre-ltwlin 8299 ax-pre-lttrn 8300 ax-pre-ltadd 8302 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-opab 4194 df-id 4440 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-iota 5340 df-fun 5382 df-fv 5388 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-pnf 8369 df-mnf 8370 df-xr 8371 df-ltxr 8372 df-le 8373 df-sub 8507 df-neg 8508 df-inn 9315 df-2 9373 df-n0 9576 df-z 9657 df-fz 10430 |
| This theorem is used by: bcctr 16314 pcbcctr 16315 bcp1ctr 16318 bposlem1 16323 bposlem3 16325 bposlem5 16327 bposlem6 16328 |
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