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Mirrors > Home > ILE Home > Th. List > facndiv | GIF version |
Description: No positive integer (greater than one) divides the factorial plus one of an equal or larger number. (Contributed by NM, 3-May-2005.) |
Ref | Expression |
---|---|
facndiv | ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ¬ (((!‘𝑀) + 1) / 𝑁) ∈ ℤ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnre 8864 | . . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ) | |
2 | recnz 9284 | . . . 4 ⊢ ((𝑁 ∈ ℝ ∧ 1 < 𝑁) → ¬ (1 / 𝑁) ∈ ℤ) | |
3 | 1, 2 | sylan 281 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 1 < 𝑁) → ¬ (1 / 𝑁) ∈ ℤ) |
4 | 3 | ad2ant2lr 502 | . 2 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ¬ (1 / 𝑁) ∈ ℤ) |
5 | facdiv 10651 | . . . . . . 7 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ ∧ 𝑁 ≤ 𝑀) → ((!‘𝑀) / 𝑁) ∈ ℕ) | |
6 | 5 | 3expa 1193 | . . . . . 6 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ 𝑁 ≤ 𝑀) → ((!‘𝑀) / 𝑁) ∈ ℕ) |
7 | 6 | nnzd 9312 | . . . . 5 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ 𝑁 ≤ 𝑀) → ((!‘𝑀) / 𝑁) ∈ ℤ) |
8 | 7 | adantrl 470 | . . . 4 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ((!‘𝑀) / 𝑁) ∈ ℤ) |
9 | zsubcl 9232 | . . . . 5 ⊢ (((((!‘𝑀) + 1) / 𝑁) ∈ ℤ ∧ ((!‘𝑀) / 𝑁) ∈ ℤ) → ((((!‘𝑀) + 1) / 𝑁) − ((!‘𝑀) / 𝑁)) ∈ ℤ) | |
10 | 9 | ex 114 | . . . 4 ⊢ ((((!‘𝑀) + 1) / 𝑁) ∈ ℤ → (((!‘𝑀) / 𝑁) ∈ ℤ → ((((!‘𝑀) + 1) / 𝑁) − ((!‘𝑀) / 𝑁)) ∈ ℤ)) |
11 | 8, 10 | syl5com 29 | . . 3 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ((((!‘𝑀) + 1) / 𝑁) ∈ ℤ → ((((!‘𝑀) + 1) / 𝑁) − ((!‘𝑀) / 𝑁)) ∈ ℤ)) |
12 | faccl 10648 | . . . . . . . . 9 ⊢ (𝑀 ∈ ℕ0 → (!‘𝑀) ∈ ℕ) | |
13 | 12 | nncnd 8871 | . . . . . . . 8 ⊢ (𝑀 ∈ ℕ0 → (!‘𝑀) ∈ ℂ) |
14 | peano2cn 8033 | . . . . . . . 8 ⊢ ((!‘𝑀) ∈ ℂ → ((!‘𝑀) + 1) ∈ ℂ) | |
15 | 13, 14 | syl 14 | . . . . . . 7 ⊢ (𝑀 ∈ ℕ0 → ((!‘𝑀) + 1) ∈ ℂ) |
16 | 15 | ad2antrr 480 | . . . . . 6 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ((!‘𝑀) + 1) ∈ ℂ) |
17 | 13 | ad2antrr 480 | . . . . . 6 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → (!‘𝑀) ∈ ℂ) |
18 | nncn 8865 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℂ) | |
19 | 18 | ad2antlr 481 | . . . . . 6 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → 𝑁 ∈ ℂ) |
20 | simplr 520 | . . . . . . 7 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → 𝑁 ∈ ℕ) | |
21 | 20 | nnap0d 8903 | . . . . . 6 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → 𝑁 # 0) |
22 | 16, 17, 19, 21 | divsubdirapd 8726 | . . . . 5 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ((((!‘𝑀) + 1) − (!‘𝑀)) / 𝑁) = ((((!‘𝑀) + 1) / 𝑁) − ((!‘𝑀) / 𝑁))) |
23 | ax-1cn 7846 | . . . . . . . 8 ⊢ 1 ∈ ℂ | |
24 | pncan2 8105 | . . . . . . . 8 ⊢ (((!‘𝑀) ∈ ℂ ∧ 1 ∈ ℂ) → (((!‘𝑀) + 1) − (!‘𝑀)) = 1) | |
25 | 13, 23, 24 | sylancl 410 | . . . . . . 7 ⊢ (𝑀 ∈ ℕ0 → (((!‘𝑀) + 1) − (!‘𝑀)) = 1) |
26 | 25 | oveq1d 5857 | . . . . . 6 ⊢ (𝑀 ∈ ℕ0 → ((((!‘𝑀) + 1) − (!‘𝑀)) / 𝑁) = (1 / 𝑁)) |
27 | 26 | ad2antrr 480 | . . . . 5 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ((((!‘𝑀) + 1) − (!‘𝑀)) / 𝑁) = (1 / 𝑁)) |
28 | 22, 27 | eqtr3d 2200 | . . . 4 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ((((!‘𝑀) + 1) / 𝑁) − ((!‘𝑀) / 𝑁)) = (1 / 𝑁)) |
29 | 28 | eleq1d 2235 | . . 3 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → (((((!‘𝑀) + 1) / 𝑁) − ((!‘𝑀) / 𝑁)) ∈ ℤ ↔ (1 / 𝑁) ∈ ℤ)) |
30 | 11, 29 | sylibd 148 | . 2 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ((((!‘𝑀) + 1) / 𝑁) ∈ ℤ → (1 / 𝑁) ∈ ℤ)) |
31 | 4, 30 | mtod 653 | 1 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ) ∧ (1 < 𝑁 ∧ 𝑁 ≤ 𝑀)) → ¬ (((!‘𝑀) + 1) / 𝑁) ∈ ℤ) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 = wceq 1343 ∈ wcel 2136 class class class wbr 3982 ‘cfv 5188 (class class class)co 5842 ℂcc 7751 ℝcr 7752 1c1 7754 + caddc 7756 < clt 7933 ≤ cle 7934 − cmin 8069 / cdiv 8568 ℕcn 8857 ℕ0cn0 9114 ℤcz 9191 !cfa 10638 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 |
This theorem depends on definitions: df-bi 116 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-po 4274 df-iso 4275 df-iord 4344 df-on 4346 df-ilim 4347 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-recs 6273 df-frec 6359 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-n0 9115 df-z 9192 df-uz 9467 df-seqfrec 10381 df-fac 10639 |
This theorem is referenced by: infpnlem1 12289 |
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