| Mathbox for Alexander van der Vekens |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 8gbe | Structured version Visualization version GIF version | ||
| Description: 8 is an even Goldbach number. (Contributed by AV, 20-Jul-2020.) |
| Ref | Expression |
|---|---|
| 8gbe | ⊢ 8 ∈ GoldbachEven |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 8even 48189 | . 2 ⊢ 8 ∈ Even | |
| 2 | 5prm 17079 | . . 3 ⊢ 5 ∈ ℙ | |
| 3 | 3prm 16663 | . . 3 ⊢ 3 ∈ ℙ | |
| 4 | 5odd 48186 | . . . 4 ⊢ 5 ∈ Odd | |
| 5 | 3odd 48184 | . . . 4 ⊢ 3 ∈ Odd | |
| 6 | 5p3e8 12333 | . . . . 5 ⊢ (5 + 3) = 8 | |
| 7 | 6 | eqcomi 2745 | . . . 4 ⊢ 8 = (5 + 3) |
| 8 | 4, 5, 7 | 3pm3.2i 1341 | . . 3 ⊢ (5 ∈ Odd ∧ 3 ∈ Odd ∧ 8 = (5 + 3)) |
| 9 | eleq1 2824 | . . . . 5 ⊢ (𝑝 = 5 → (𝑝 ∈ Odd ↔ 5 ∈ Odd )) | |
| 10 | biidd 262 | . . . . 5 ⊢ (𝑝 = 5 → (𝑞 ∈ Odd ↔ 𝑞 ∈ Odd )) | |
| 11 | oveq1 7374 | . . . . . 6 ⊢ (𝑝 = 5 → (𝑝 + 𝑞) = (5 + 𝑞)) | |
| 12 | 11 | eqeq2d 2747 | . . . . 5 ⊢ (𝑝 = 5 → (8 = (𝑝 + 𝑞) ↔ 8 = (5 + 𝑞))) |
| 13 | 9, 10, 12 | 3anbi123d 1439 | . . . 4 ⊢ (𝑝 = 5 → ((𝑝 ∈ Odd ∧ 𝑞 ∈ Odd ∧ 8 = (𝑝 + 𝑞)) ↔ (5 ∈ Odd ∧ 𝑞 ∈ Odd ∧ 8 = (5 + 𝑞)))) |
| 14 | biidd 262 | . . . . 5 ⊢ (𝑞 = 3 → (5 ∈ Odd ↔ 5 ∈ Odd )) | |
| 15 | eleq1 2824 | . . . . 5 ⊢ (𝑞 = 3 → (𝑞 ∈ Odd ↔ 3 ∈ Odd )) | |
| 16 | oveq2 7375 | . . . . . 6 ⊢ (𝑞 = 3 → (5 + 𝑞) = (5 + 3)) | |
| 17 | 16 | eqeq2d 2747 | . . . . 5 ⊢ (𝑞 = 3 → (8 = (5 + 𝑞) ↔ 8 = (5 + 3))) |
| 18 | 14, 15, 17 | 3anbi123d 1439 | . . . 4 ⊢ (𝑞 = 3 → ((5 ∈ Odd ∧ 𝑞 ∈ Odd ∧ 8 = (5 + 𝑞)) ↔ (5 ∈ Odd ∧ 3 ∈ Odd ∧ 8 = (5 + 3)))) |
| 19 | 13, 18 | rspc2ev 3577 | . . 3 ⊢ ((5 ∈ ℙ ∧ 3 ∈ ℙ ∧ (5 ∈ Odd ∧ 3 ∈ Odd ∧ 8 = (5 + 3))) → ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑝 ∈ Odd ∧ 𝑞 ∈ Odd ∧ 8 = (𝑝 + 𝑞))) |
| 20 | 2, 3, 8, 19 | mp3an 1464 | . 2 ⊢ ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑝 ∈ Odd ∧ 𝑞 ∈ Odd ∧ 8 = (𝑝 + 𝑞)) |
| 21 | isgbe 48227 | . 2 ⊢ (8 ∈ GoldbachEven ↔ (8 ∈ Even ∧ ∃𝑝 ∈ ℙ ∃𝑞 ∈ ℙ (𝑝 ∈ Odd ∧ 𝑞 ∈ Odd ∧ 8 = (𝑝 + 𝑞)))) | |
| 22 | 1, 20, 21 | mpbir2an 712 | 1 ⊢ 8 ∈ GoldbachEven |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ∃wrex 3061 (class class class)co 7367 + caddc 11041 3c3 12237 5c5 12239 8c8 12242 ℙcprime 16640 Even ceven 48100 Odd codd 48101 GoldbachEven cgbe 48221 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-2o 8406 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-sup 9355 df-inf 9356 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-nn 12175 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-9 12251 df-n0 12438 df-z 12525 df-dec 12645 df-uz 12789 df-rp 12943 df-fz 13462 df-seq 13964 df-exp 14024 df-cj 15061 df-re 15062 df-im 15063 df-sqrt 15197 df-abs 15198 df-dvds 16222 df-prm 16641 df-even 48102 df-odd 48103 df-gbe 48224 |
| This theorem is referenced by: nnsum3primesle9 48270 |
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