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Mirrors > Home > MPE Home > Th. List > Mathboxes > nnsum4primes4 | Structured version Visualization version GIF version |
Description: 4 is the sum of at most 4 (actually 2) primes. (Contributed by AV, 23-Jul-2020.) (Proof shortened by AV, 2-Aug-2020.) |
Ref | Expression |
---|---|
nnsum4primes4 | ⊢ ∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑m (1...𝑑))(𝑑 ≤ 4 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnsum3primes4 45298 | . 2 ⊢ ∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑m (1...𝑑))(𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) | |
2 | 3lt4 12193 | . . . . . 6 ⊢ 3 < 4 | |
3 | nnre 12026 | . . . . . . 7 ⊢ (𝑑 ∈ ℕ → 𝑑 ∈ ℝ) | |
4 | 3re 12099 | . . . . . . . 8 ⊢ 3 ∈ ℝ | |
5 | 4 | a1i 11 | . . . . . . 7 ⊢ (𝑑 ∈ ℕ → 3 ∈ ℝ) |
6 | 4re 12103 | . . . . . . . 8 ⊢ 4 ∈ ℝ | |
7 | 6 | a1i 11 | . . . . . . 7 ⊢ (𝑑 ∈ ℕ → 4 ∈ ℝ) |
8 | leltletr 11112 | . . . . . . 7 ⊢ ((𝑑 ∈ ℝ ∧ 3 ∈ ℝ ∧ 4 ∈ ℝ) → ((𝑑 ≤ 3 ∧ 3 < 4) → 𝑑 ≤ 4)) | |
9 | 3, 5, 7, 8 | syl3anc 1371 | . . . . . 6 ⊢ (𝑑 ∈ ℕ → ((𝑑 ≤ 3 ∧ 3 < 4) → 𝑑 ≤ 4)) |
10 | 2, 9 | mpan2i 695 | . . . . 5 ⊢ (𝑑 ∈ ℕ → (𝑑 ≤ 3 → 𝑑 ≤ 4)) |
11 | 10 | anim1d 612 | . . . 4 ⊢ (𝑑 ∈ ℕ → ((𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) → (𝑑 ≤ 4 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)))) |
12 | 11 | reximdv 3164 | . . 3 ⊢ (𝑑 ∈ ℕ → (∃𝑓 ∈ (ℙ ↑m (1...𝑑))(𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) → ∃𝑓 ∈ (ℙ ↑m (1...𝑑))(𝑑 ≤ 4 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)))) |
13 | 12 | reximia 3081 | . 2 ⊢ (∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑m (1...𝑑))(𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) → ∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑m (1...𝑑))(𝑑 ≤ 4 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘))) |
14 | 1, 13 | ax-mp 5 | 1 ⊢ ∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑m (1...𝑑))(𝑑 ≤ 4 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1539 ∈ wcel 2104 ∃wrex 3071 class class class wbr 5081 ‘cfv 6458 (class class class)co 7307 ↑m cmap 8646 ℝcr 10916 1c1 10918 < clt 11055 ≤ cle 11056 ℕcn 12019 3c3 12075 4c4 12076 ...cfz 13285 Σcsu 15442 ℙcprime 16421 |
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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-rep 5218 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-inf2 9443 ax-cnex 10973 ax-resscn 10974 ax-1cn 10975 ax-icn 10976 ax-addcl 10977 ax-addrcl 10978 ax-mulcl 10979 ax-mulrcl 10980 ax-mulcom 10981 ax-addass 10982 ax-mulass 10983 ax-distr 10984 ax-i2m1 10985 ax-1ne0 10986 ax-1rid 10987 ax-rnegex 10988 ax-rrecex 10989 ax-cnre 10990 ax-pre-lttri 10991 ax-pre-lttrn 10992 ax-pre-ltadd 10993 ax-pre-mulgt0 10994 ax-pre-sup 10995 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3285 df-reu 3286 df-rab 3287 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-int 4887 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-se 5556 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-isom 6467 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-1st 7863 df-2nd 7864 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-1o 8328 df-2o 8329 df-er 8529 df-map 8648 df-en 8765 df-dom 8766 df-sdom 8767 df-fin 8768 df-sup 9245 df-oi 9313 df-card 9741 df-pnf 11057 df-mnf 11058 df-xr 11059 df-ltxr 11060 df-le 11061 df-sub 11253 df-neg 11254 df-div 11679 df-nn 12020 df-2 12082 df-3 12083 df-4 12084 df-n0 12280 df-z 12366 df-uz 12629 df-rp 12777 df-fz 13286 df-fzo 13429 df-seq 13768 df-exp 13829 df-hash 14091 df-cj 14855 df-re 14856 df-im 14857 df-sqrt 14991 df-abs 14992 df-clim 15242 df-sum 15443 df-dvds 16009 df-prm 16422 |
This theorem is referenced by: (None) |
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