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| Mirrors > Home > MPE Home > Th. List > prmgaplcm | Structured version Visualization version GIF version | ||
| Description: Alternate proof of prmgap 17030: in contrast to prmgap 17030, 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 22 | . . 3 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℕ) | |
| 2 | fzssz 13487 | . . . . . . . 8 ⊢ (1...𝑥) ⊆ ℤ | |
| 3 | 2 | a1i 11 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → (1...𝑥) ⊆ ℤ) |
| 4 | fzfi 13937 | . . . . . . . 8 ⊢ (1...𝑥) ∈ Fin | |
| 5 | 4 | a1i 11 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → (1...𝑥) ∈ Fin) |
| 6 | 0nelfz1 13504 | . . . . . . . 8 ⊢ 0 ∉ (1...𝑥) | |
| 7 | 6 | a1i 11 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → 0 ∉ (1...𝑥)) |
| 8 | lcmfn0cl 16596 | . . . . . . 7 ⊢ (((1...𝑥) ⊆ ℤ ∧ (1...𝑥) ∈ Fin ∧ 0 ∉ (1...𝑥)) → (lcm‘(1...𝑥)) ∈ ℕ) | |
| 9 | 3, 5, 7, 8 | syl3anc 1373 | . . . . . 6 ⊢ (𝑥 ∈ ℕ → (lcm‘(1...𝑥)) ∈ ℕ) |
| 10 | 9 | adantl 481 | . . . . 5 ⊢ ((𝑛 ∈ ℕ ∧ 𝑥 ∈ ℕ) → (lcm‘(1...𝑥)) ∈ ℕ) |
| 11 | eqid 2729 | . . . . 5 ⊢ (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) = (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) | |
| 12 | 10, 11 | fmptd 7086 | . . . 4 ⊢ (𝑛 ∈ ℕ → (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))):ℕ⟶ℕ) |
| 13 | nnex 12192 | . . . . . 6 ⊢ ℕ ∈ V | |
| 14 | 13, 13 | pm3.2i 470 | . . . . 5 ⊢ (ℕ ∈ V ∧ ℕ ∈ V) |
| 15 | elmapg 8812 | . . . . 5 ⊢ ((ℕ ∈ V ∧ ℕ ∈ V) → ((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) ∈ (ℕ ↑m ℕ) ↔ (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))):ℕ⟶ℕ)) | |
| 16 | 14, 15 | mp1i 13 | . . . 4 ⊢ (𝑛 ∈ ℕ → ((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) ∈ (ℕ ↑m ℕ) ↔ (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))):ℕ⟶ℕ)) |
| 17 | 12, 16 | mpbird 257 | . . 3 ⊢ (𝑛 ∈ ℕ → (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) ∈ (ℕ ↑m ℕ)) |
| 18 | prmgaplcmlem2 17023 | . . . . 5 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → 1 < (((lcm‘(1...𝑛)) + 𝑖) gcd 𝑖)) | |
| 19 | eqidd 2730 | . . . . . . . 8 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥))) = (𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))) | |
| 20 | oveq2 7395 | . . . . . . . . . 10 ⊢ (𝑥 = 𝑛 → (1...𝑥) = (1...𝑛)) | |
| 21 | 20 | fveq2d 6862 | . . . . . . . . 9 ⊢ (𝑥 = 𝑛 → (lcm‘(1...𝑥)) = (lcm‘(1...𝑛))) |
| 22 | 21 | adantl 481 | . . . . . . . 8 ⊢ (((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) ∧ 𝑥 = 𝑛) → (lcm‘(1...𝑥)) = (lcm‘(1...𝑛))) |
| 23 | simpl 482 | . . . . . . . 8 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → 𝑛 ∈ ℕ) | |
| 24 | fzssz 13487 | . . . . . . . . . 10 ⊢ (1...𝑛) ⊆ ℤ | |
| 25 | fzfi 13937 | . . . . . . . . . 10 ⊢ (1...𝑛) ∈ Fin | |
| 26 | 24, 25 | pm3.2i 470 | . . . . . . . . 9 ⊢ ((1...𝑛) ⊆ ℤ ∧ (1...𝑛) ∈ Fin) |
| 27 | lcmfcl 16598 | . . . . . . . . 9 ⊢ (((1...𝑛) ⊆ ℤ ∧ (1...𝑛) ∈ Fin) → (lcm‘(1...𝑛)) ∈ ℕ0) | |
| 28 | 26, 27 | mp1i 13 | . . . . . . . 8 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → (lcm‘(1...𝑛)) ∈ ℕ0) |
| 29 | 19, 22, 23, 28 | fvmptd 6975 | . . . . . . 7 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → ((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) = (lcm‘(1...𝑛))) |
| 30 | 29 | oveq1d 7402 | . . . . . 6 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → (((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) + 𝑖) = ((lcm‘(1...𝑛)) + 𝑖)) |
| 31 | 30 | oveq1d 7402 | . . . . 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 5135 | . . . 4 ⊢ ((𝑛 ∈ ℕ ∧ 𝑖 ∈ (2...𝑛)) → 1 < ((((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) + 𝑖) gcd 𝑖)) |
| 33 | 32 | ralrimiva 3125 | . . 3 ⊢ (𝑛 ∈ ℕ → ∀𝑖 ∈ (2...𝑛)1 < ((((𝑥 ∈ ℕ ↦ (lcm‘(1...𝑥)))‘𝑛) + 𝑖) gcd 𝑖)) |
| 34 | 1, 17, 33 | prmgaplem8 17029 | . 2 ⊢ (𝑛 ∈ ℕ → ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑛 ≤ (𝑞 − 𝑝) ∧ ∀𝑧 ∈ ((𝑝 + 1)..^𝑞)𝑧 ∉ ℙ)) |
| 35 | 34 | rgen 3046 | 1 ⊢ ∀𝑛 ∈ ℕ ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑛 ≤ (𝑞 − 𝑝) ∧ ∀𝑧 ∈ ((𝑝 + 1)..^𝑞)𝑧 ∉ ℙ) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∉ wnel 3029 ∀wral 3044 ∃wrex 3053 Vcvv 3447 ⊆ wss 3914 class class class wbr 5107 ↦ cmpt 5188 ⟶wf 6507 ‘cfv 6511 (class class class)co 7387 ↑m cmap 8799 Fincfn 8918 0cc0 11068 1c1 11069 + caddc 11071 < clt 11208 ≤ cle 11209 − cmin 11405 ℕcn 12186 2c2 12241 ℕ0cn0 12442 ℤcz 12529 ...cfz 13468 ..^cfzo 13615 gcd cgcd 16464 lcmclcmf 16559 ℙcprime 16641 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-inf2 9594 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 ax-pre-sup 11146 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3354 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-int 4911 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-se 5592 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-isom 6520 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-1o 8434 df-2o 8435 df-er 8671 df-map 8801 df-en 8919 df-dom 8920 df-sdom 8921 df-fin 8922 df-sup 9393 df-inf 9394 df-oi 9463 df-card 9892 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-div 11836 df-nn 12187 df-2 12249 df-3 12250 df-n0 12443 df-z 12530 df-uz 12794 df-rp 12952 df-fz 13469 df-fzo 13616 df-seq 13967 df-exp 14027 df-fac 14239 df-hash 14296 df-cj 15065 df-re 15066 df-im 15067 df-sqrt 15201 df-abs 15202 df-clim 15454 df-prod 15870 df-dvds 16223 df-gcd 16465 df-lcmf 16561 df-prm 16642 |
| This theorem is referenced by: (None) |
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