nnsum3primes4 - Mathbox for Alexander van der Vekens

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Theorem nnsum3primes4 46456

Description: 4 is the sum of at most 3 (actually 2) primes. (Contributed by AV, 2-Aug-2020.)

**Assertion**
Ref	Expression
nnsum3primes4	⊢ ∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑_m (1...𝑑))(𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘))

Distinct variable group: 𝑓,𝑑,𝑘

**Proof of Theorem nnsum3primes4**
Step	Hyp	Ref	Expression
1		2nn 12285	. 2 ⊢ 2 ∈ ℕ
2		1ne2 12420	. . . . 5 ⊢ 1 ≠ 2
3		1ex 11210	. . . . . 6 ⊢ 1 ∈ V
4		2ex 12289	. . . . . 6 ⊢ 2 ∈ V
5	3, 4, 4, 4	fpr 7152	. . . . 5 ⊢ (1 ≠ 2 → {⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶{2, 2})
6		2prm 16629	. . . . . . . 8 ⊢ 2 ∈ ℙ
7	6, 6	pm3.2i 472	. . . . . . 7 ⊢ (2 ∈ ℙ ∧ 2 ∈ ℙ)
8	4, 4	prss 4824	. . . . . . 7 ⊢ ((2 ∈ ℙ ∧ 2 ∈ ℙ) ↔ {2, 2} ⊆ ℙ)
9	7, 8	mpbi 229	. . . . . 6 ⊢ {2, 2} ⊆ ℙ
10		fss 6735	. . . . . 6 ⊢ (({⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶{2, 2} ∧ {2, 2} ⊆ ℙ) → {⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶ℙ)
11	9, 10	mpan2 690	. . . . 5 ⊢ ({⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶{2, 2} → {⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶ℙ)
12	2, 5, 11	mp2b 10	. . . 4 ⊢ {⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶ℙ
13		prmex 16614	. . . . 5 ⊢ ℙ ∈ V
14		prex 5433	. . . . 5 ⊢ {1, 2} ∈ V
15	13, 14	elmap 8865	. . . 4 ⊢ ({⟨1, 2⟩, ⟨2, 2⟩} ∈ (ℙ ↑_m {1, 2}) ↔ {⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶ℙ)
16	12, 15	mpbir 230	. . 3 ⊢ {⟨1, 2⟩, ⟨2, 2⟩} ∈ (ℙ ↑_m {1, 2})
17		2re 12286	. . . . 5 ⊢ 2 ∈ ℝ
18		3re 12292	. . . . 5 ⊢ 3 ∈ ℝ
19		2lt3 12384	. . . . 5 ⊢ 2 < 3
20	17, 18, 19	ltleii 11337	. . . 4 ⊢ 2 ≤ 3
21		2cn 12287	. . . . . 6 ⊢ 2 ∈ ℂ
22		fveq2 6892	. . . . . . . 8 ⊢ (𝑘 = 1 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = ({⟨1, 2⟩, ⟨2, 2⟩}‘1))
23	3, 4	fvpr1 7191	. . . . . . . . 9 ⊢ (1 ≠ 2 → ({⟨1, 2⟩, ⟨2, 2⟩}‘1) = 2)
24	2, 23	ax-mp 5	. . . . . . . 8 ⊢ ({⟨1, 2⟩, ⟨2, 2⟩}‘1) = 2
25	22, 24	eqtrdi 2789	. . . . . . 7 ⊢ (𝑘 = 1 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = 2)
26		fveq2 6892	. . . . . . . 8 ⊢ (𝑘 = 2 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = ({⟨1, 2⟩, ⟨2, 2⟩}‘2))
27	4, 4	fvpr2 7193	. . . . . . . . 9 ⊢ (1 ≠ 2 → ({⟨1, 2⟩, ⟨2, 2⟩}‘2) = 2)
28	2, 27	ax-mp 5	. . . . . . . 8 ⊢ ({⟨1, 2⟩, ⟨2, 2⟩}‘2) = 2
29	26, 28	eqtrdi 2789	. . . . . . 7 ⊢ (𝑘 = 2 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = 2)
30		id 22	. . . . . . . 8 ⊢ (2 ∈ ℂ → 2 ∈ ℂ)
31	30	ancri 551	. . . . . . 7 ⊢ (2 ∈ ℂ → (2 ∈ ℂ ∧ 2 ∈ ℂ))
32	3	jctl 525	. . . . . . 7 ⊢ (2 ∈ ℂ → (1 ∈ V ∧ 2 ∈ ℂ))
33	2	a1i 11	. . . . . . 7 ⊢ (2 ∈ ℂ → 1 ≠ 2)
34	25, 29, 31, 32, 33	sumpr 15694	. . . . . 6 ⊢ (2 ∈ ℂ → Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = (2 + 2))
35	21, 34	ax-mp 5	. . . . 5 ⊢ Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = (2 + 2)
36		2p2e4 12347	. . . . 5 ⊢ (2 + 2) = 4
37	35, 36	eqtr2i 2762	. . . 4 ⊢ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘)
38	20, 37	pm3.2i 472	. . 3 ⊢ (2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))
39		fveq1 6891	. . . . . . 7 ⊢ (𝑓 = {⟨1, 2⟩, ⟨2, 2⟩} → (𝑓‘𝑘) = ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))
40	39	sumeq2sdv 15650	. . . . . 6 ⊢ (𝑓 = {⟨1, 2⟩, ⟨2, 2⟩} → Σ𝑘 ∈ {1, 2} (𝑓‘𝑘) = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))
41	40	eqeq2d 2744	. . . . 5 ⊢ (𝑓 = {⟨1, 2⟩, ⟨2, 2⟩} → (4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘) ↔ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘)))
42	41	anbi2d 630	. . . 4 ⊢ (𝑓 = {⟨1, 2⟩, ⟨2, 2⟩} → ((2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘)) ↔ (2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))))
43	42	rspcev 3613	. . 3 ⊢ (({⟨1, 2⟩, ⟨2, 2⟩} ∈ (ℙ ↑_m {1, 2}) ∧ (2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))) → ∃𝑓 ∈ (ℙ ↑_m {1, 2})(2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘)))
44	16, 38, 43	mp2an 691	. 2 ⊢ ∃𝑓 ∈ (ℙ ↑_m {1, 2})(2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))
45		oveq2 7417	. . . . . 6 ⊢ (𝑑 = 2 → (1...𝑑) = (1...2))
46		df-2 12275	. . . . . . . 8 ⊢ 2 = (1 + 1)
47	46	oveq2i 7420	. . . . . . 7 ⊢ (1...2) = (1...(1 + 1))
48		1z 12592	. . . . . . . . 9 ⊢ 1 ∈ ℤ
49		fzpr 13556	. . . . . . . . 9 ⊢ (1 ∈ ℤ → (1...(1 + 1)) = {1, (1 + 1)})
50	48, 49	ax-mp 5	. . . . . . . 8 ⊢ (1...(1 + 1)) = {1, (1 + 1)}
51		1p1e2 12337	. . . . . . . . 9 ⊢ (1 + 1) = 2
52	51	preq2i 4742	. . . . . . . 8 ⊢ {1, (1 + 1)} = {1, 2}
53	50, 52	eqtri 2761	. . . . . . 7 ⊢ (1...(1 + 1)) = {1, 2}
54	47, 53	eqtri 2761	. . . . . 6 ⊢ (1...2) = {1, 2}
55	45, 54	eqtrdi 2789	. . . . 5 ⊢ (𝑑 = 2 → (1...𝑑) = {1, 2})
56	55	oveq2d 7425	. . . 4 ⊢ (𝑑 = 2 → (ℙ ↑_m (1...𝑑)) = (ℙ ↑_m {1, 2}))
57		breq1 5152	. . . . 5 ⊢ (𝑑 = 2 → (𝑑 ≤ 3 ↔ 2 ≤ 3))
58	55	sumeq1d 15647	. . . . . 6 ⊢ (𝑑 = 2 → Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘) = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))
59	58	eqeq2d 2744	. . . . 5 ⊢ (𝑑 = 2 → (4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘) ↔ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘)))
60	57, 59	anbi12d 632	. . . 4 ⊢ (𝑑 = 2 → ((𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) ↔ (2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))))
61	56, 60	rexeqbidv 3344	. . 3 ⊢ (𝑑 = 2 → (∃𝑓 ∈ (ℙ ↑_m (1...𝑑))(𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) ↔ ∃𝑓 ∈ (ℙ ↑_m {1, 2})(2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))))
62	61	rspcev 3613	. 2 ⊢ ((2 ∈ ℕ ∧ ∃𝑓 ∈ (ℙ ↑_m {1, 2})(2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))) → ∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑_m (1...𝑑))(𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)))
63	1, 44, 62	mp2an 691	1 ⊢ ∃𝑑 ∈ ℕ ∃𝑓 ∈ (ℙ ↑_m (1...𝑑))(𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘))

Colors of variables: wff setvar class

Syntax hints: ∧ wa 397 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∃wrex 3071 Vcvv 3475 ⊆ wss 3949 {cpr 4631 ⟨cop 4635 class class class wbr 5149 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ↑_m cmap 8820 ℂcc 11108 1c1 11111 + caddc 11113 ≤ cle 11249 ℕcn 12212 2c2 12267 3c3 12268 4c4 12269 ℤcz 12558 ...cfz 13484 Σcsu 15632 ℙcprime 16608

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-2o 8467 df-er 8703 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9437 df-oi 9505 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-4 12277 df-n0 12473 df-z 12559 df-uz 12823 df-rp 12975 df-fz 13485 df-fzo 13628 df-seq 13967 df-exp 14028 df-hash 14291 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-clim 15432 df-sum 15633 df-dvds 16198 df-prm 16609

This theorem is referenced by: nnsum4primes4 46457 nnsum3primesle9 46462

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