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| Mirrors > Home > MPE Home > Th. List > prmgaplcm | Structured version Visualization version GIF version | ||
| Description: Alternate proof of prmgap 17154: in contrast to prmgap 17154, where the gap starts at n! , the factorial of n, the gap starts at the least common multiple of all positive integers less than or equal to n. (Contributed by AV, 13-Aug-2020.) (Revised by AV, 27-Aug-2020.) (Proof modification is discouraged.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| prmgaplcm | ⊢ ∀𝑛 ∈ ℕ ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑛 ≤ (𝑞 − 𝑝) ∧ ∀𝑧 ∈ ((𝑝 + 1)..^𝑞)𝑧 ∉ ℙ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 23 | . . 3 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℕ) | |
| 2 | fzssz 13583 | . . . . . . . 8 ⊢ (1...𝑥) ⊆ ℤ | |
| 3 | 2 | a1i 11 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → (1...𝑥) ⊆ ℤ) |
| 4 | fzfi 14039 | . . . . . . . 8 ⊢ (1...𝑥) ∈ Fin | |
| 5 | 4 | a1i 11 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → (1...𝑥) ∈ Fin) |
| 6 | 0nelfz1 13600 | . . . . . . . 8 ⊢ 0 ∉ (1...𝑥) | |
| 7 | 6 | a1i 11 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → 0 ∉ (1...𝑥)) |
| 8 | lcmfn0cl 16719 | . . . . . . 7 ⊢ (((1...𝑥) ⊆ ℤ ∧ (1...𝑥) ∈ Fin ∧ 0 ∉ (1...𝑥)) → (lcm‘(1...𝑥)) ∈ ℕ) | |
| 9 | 3, 5, 7, 8 | syl3anc 1398 | . . . . . 6 ⊢ (𝑥 ∈ ℕ → (lcm‘(1...𝑥)) ∈ ℕ) |
| 10 | 9 | adantl 487 | . . . . 5 ⊢ ((𝑛 ∈ ℕ ∧ 𝑥 ∈ ℕ) → (lcm‘(1...𝑥)) ∈ ℕ) |
| 11 | eqid 2760 | . . . . 5 ⊢ (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) = (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) | |
| 12 | 10, 11 | fmptd 7108 | . . . 4 ⊢ (𝑛 ∈ ℕ → (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))):ℕ⟶ℕ) |
| 13 | nnex 12266 | . . . . . 6 ⊢ ℕ ∈ V | |
| 14 | 13, 13 | pm3.2i 476 | . . . . 5 ⊢ (ℕ ∈ V ∧ ℕ ∈ V) |
| 15 | elmapg 8841 | . . . . 5 ⊢ ((ℕ ∈ V ∧ ℕ ∈ V) → ((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) ∈ (ℕ ↑m ℕ) ↔ (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))):ℕ⟶ℕ)) | |
| 16 | 14, 15 | mp1i 14 | . . . 4 ⊢ (𝑛 ∈ ℕ → ((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) ∈ (ℕ ↑m ℕ) ↔ (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))):ℕ⟶ℕ)) |
| 17 | 12, 16 | mpbird 260 | . . 3 ⊢ (𝑛 ∈ ℕ → (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) ∈ (ℕ ↑m ℕ)) |
| 18 | prmgaplcmlem2 17147 | . . . . 5 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → 1 < (((lcm‘(1...𝑛)) + 𝑖) gcd 𝑖)) | |
| 19 | eqidd 2761 | . . . . . . . 8 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) = (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))) | |
| 20 | oveq2 7422 | . . . . . . . . . 10 ⊢ (𝑥 = 𝑛 → (1...𝑥) = (1...𝑛)) | |
| 21 | 20 | fveq2d 6883 | . . . . . . . . 9 ⊢ (𝑥 = 𝑛 → (lcm‘(1...𝑥)) = (lcm‘(1...𝑛))) |
| 22 | 21 | adantl 487 | . . . . . . . 8 ⊢ (((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) ∧ 𝑥 = 𝑛) → (lcm‘(1...𝑥)) = (lcm‘(1...𝑛))) |
| 23 | simpl 488 | . . . . . . . 8 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → 𝑛 ∈ ℕ) | |
| 24 | fzssz 13583 | . . . . . . . . . 10 ⊢ (1...𝑛) ⊆ ℤ | |
| 25 | fzfi 14039 | . . . . . . . . . 10 ⊢ (1...𝑛) ∈ Fin | |
| 26 | 24, 25 | pm3.2i 476 | . . . . . . . . 9 ⊢ ((1...𝑛) ⊆ ℤ ∧ (1...𝑛) ∈ Fin) |
| 27 | lcmfcl 16721 | . . . . . . . . 9 ⊢ (((1...𝑛) ⊆ ℤ ∧ (1...𝑛) ∈ Fin) → (lcm‘(1...𝑛)) ∈ ℕ0) | |
| 28 | 26, 27 | mp1i 14 | . . . . . . . 8 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → (lcm‘(1...𝑛)) ∈ ℕ0) |
| 29 | 19, 22, 23, 28 | fvmptd 6995 | . . . . . . 7 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → ((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) = (lcm‘(1...𝑛))) |
| 30 | 29 | oveq1d 7429 | . . . . . 6 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → (((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) + 𝑖) = ((lcm‘(1...𝑛)) + 𝑖)) |
| 31 | 30 | oveq1d 7429 | . . . . 5 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → ((((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) + 𝑖) gcd 𝑖) = (((lcm‘(1...𝑛)) + 𝑖) gcd 𝑖)) |
| 32 | 18, 31 | breqtrrd 5133 | . . . 4 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → 1 < ((((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) + 𝑖) gcd 𝑖)) |
| 33 | 32 | ralrimiva 3154 | . . 3 ⊢ (𝑛 ∈ ℕ → ∀𝑖 ∈ (2...𝑛)1 < ((((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) + 𝑖) gcd 𝑖)) |
| 34 | 1, 17, 33 | prmgaplem8 17153 | . 2 ⊢ (𝑛 ∈ ℕ → ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑛 ≤ (𝑞 − 𝑝) ∧ ∀𝑧 ∈ ((𝑝 + 1)..^𝑞)𝑧 ∉ ℙ)) |
| 35 | 34 | rgen 3078 | 1 ⊢ ∀𝑛 ∈ ℕ ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑛 ≤ (𝑞 − 𝑝) ∧ ∀𝑧 ∈ ((𝑝 + 1)..^𝑞)𝑧 ∉ ℙ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∉ wnel 3061 ∀wral 3076 ∃wrex 3086 Vcvv 3450 ⊆ wss 3899 class class class wbr 5103 ↦ cmpt 5186 ⟶wf 6529 ‘cfv 6533 (class class class)co 7414 ↑m cmap 8829 Fincfn 8955 0cc0 11127 1c1 11128 + caddc 11130 < clt 11270 ≤ cle 11271 − cmin 11468 ℕcn 12260 2c2 12322 ℕ0cn0 12531 ℤcz 12618 ...cfz 13564 ..^cfzo 13712 gcd cgcd 16587 lcmclcmf 16682 ℙcprime 16764 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-inf2 9623 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-isom 6542 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8458 df-2o 8459 df-er 8699 df-map 8831 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-sup 9415 df-inf 9416 df-oi 9485 df-card 9947 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-2 12330 df-3 12331 df-n0 12532 df-z 12619 df-uz 12891 df-rp 13046 df-fz 13565 df-fzo 13713 df-seq 14069 df-exp 14129 df-fac 14341 df-hash 14398 df-cj 15189 df-re 15190 df-im 15191 df-sqrt 15325 df-abs 15326 df-clim 15578 df-prod 15996 df-dvds 16346 df-gcd 16588 df-lcmf 16684 df-prm 16765 |
| This theorem is used by: (None) |
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