nnsum3primes4 - Mathbox for Alexander van der Vekens

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Theorem nnsum3primes4 46755

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 12290	. 2 ⊢ 2 ∈ ℕ
2		1ne2 12425	. . . . 5 ⊢ 1 ≠ 2
3		1ex 11215	. . . . . 6 ⊢ 1 ∈ V
4		2ex 12294	. . . . . 6 ⊢ 2 ∈ V
5	3, 4, 4, 4	fpr 7154	. . . . 5 ⊢ (1 ≠ 2 → {⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶{2, 2})
6		2prm 16634	. . . . . . . 8 ⊢ 2 ∈ ℙ
7	6, 6	pm3.2i 470	. . . . . . 7 ⊢ (2 ∈ ℙ ∧ 2 ∈ ℙ)
8	4, 4	prss 4823	. . . . . . 7 ⊢ ((2 ∈ ℙ ∧ 2 ∈ ℙ) ↔ {2, 2} ⊆ ℙ)
9	7, 8	mpbi 229	. . . . . 6 ⊢ {2, 2} ⊆ ℙ
10		fss 6734	. . . . . 6 ⊢ (({⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶{2, 2} ∧ {2, 2} ⊆ ℙ) → {⟨1, 2⟩, ⟨2, 2⟩}:{1, 2}⟶ℙ)
11	9, 10	mpan2 688	. . . . 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 16619	. . . . 5 ⊢ ℙ ∈ V
14		prex 5432	. . . . 5 ⊢ {1, 2} ∈ V
15	13, 14	elmap 8869	. . . 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 12291	. . . . 5 ⊢ 2 ∈ ℝ
18		3re 12297	. . . . 5 ⊢ 3 ∈ ℝ
19		2lt3 12389	. . . . 5 ⊢ 2 < 3
20	17, 18, 19	ltleii 11342	. . . 4 ⊢ 2 ≤ 3
21		2cn 12292	. . . . . 6 ⊢ 2 ∈ ℂ
22		fveq2 6891	. . . . . . . 8 ⊢ (𝑘 = 1 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = ({⟨1, 2⟩, ⟨2, 2⟩}‘1))
23	3, 4	fvpr1 7193	. . . . . . . . 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 2787	. . . . . . 7 ⊢ (𝑘 = 1 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = 2)
26		fveq2 6891	. . . . . . . 8 ⊢ (𝑘 = 2 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = ({⟨1, 2⟩, ⟨2, 2⟩}‘2))
27	4, 4	fvpr2 7195	. . . . . . . . 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 2787	. . . . . . 7 ⊢ (𝑘 = 2 → ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘) = 2)
30		id 22	. . . . . . . 8 ⊢ (2 ∈ ℂ → 2 ∈ ℂ)
31	30	ancri 549	. . . . . . 7 ⊢ (2 ∈ ℂ → (2 ∈ ℂ ∧ 2 ∈ ℂ))
32	3	jctl 523	. . . . . . 7 ⊢ (2 ∈ ℂ → (1 ∈ V ∧ 2 ∈ ℂ))
33	2	a1i 11	. . . . . . 7 ⊢ (2 ∈ ℂ → 1 ≠ 2)
34	25, 29, 31, 32, 33	sumpr 15699	. . . . . 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 12352	. . . . 5 ⊢ (2 + 2) = 4
37	35, 36	eqtr2i 2760	. . . 4 ⊢ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘)
38	20, 37	pm3.2i 470	. . 3 ⊢ (2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))
39		fveq1 6890	. . . . . . 7 ⊢ (𝑓 = {⟨1, 2⟩, ⟨2, 2⟩} → (𝑓‘𝑘) = ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))
40	39	sumeq2sdv 15655	. . . . . 6 ⊢ (𝑓 = {⟨1, 2⟩, ⟨2, 2⟩} → Σ𝑘 ∈ {1, 2} (𝑓‘𝑘) = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘))
41	40	eqeq2d 2742	. . . . 5 ⊢ (𝑓 = {⟨1, 2⟩, ⟨2, 2⟩} → (4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘) ↔ 4 = Σ𝑘 ∈ {1, 2} ({⟨1, 2⟩, ⟨2, 2⟩}‘𝑘)))
42	41	anbi2d 628	. . . 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 3612	. . 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 689	. 2 ⊢ ∃𝑓 ∈ (ℙ ↑_m {1, 2})(2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))
45		oveq2 7420	. . . . . 6 ⊢ (𝑑 = 2 → (1...𝑑) = (1...2))
46		df-2 12280	. . . . . . . 8 ⊢ 2 = (1 + 1)
47	46	oveq2i 7423	. . . . . . 7 ⊢ (1...2) = (1...(1 + 1))
48		1z 12597	. . . . . . . . 9 ⊢ 1 ∈ ℤ
49		fzpr 13561	. . . . . . . . 9 ⊢ (1 ∈ ℤ → (1...(1 + 1)) = {1, (1 + 1)})
50	48, 49	ax-mp 5	. . . . . . . 8 ⊢ (1...(1 + 1)) = {1, (1 + 1)}
51		1p1e2 12342	. . . . . . . . 9 ⊢ (1 + 1) = 2
52	51	preq2i 4741	. . . . . . . 8 ⊢ {1, (1 + 1)} = {1, 2}
53	50, 52	eqtri 2759	. . . . . . 7 ⊢ (1...(1 + 1)) = {1, 2}
54	47, 53	eqtri 2759	. . . . . 6 ⊢ (1...2) = {1, 2}
55	45, 54	eqtrdi 2787	. . . . 5 ⊢ (𝑑 = 2 → (1...𝑑) = {1, 2})
56	55	oveq2d 7428	. . . 4 ⊢ (𝑑 = 2 → (ℙ ↑_m (1...𝑑)) = (ℙ ↑_m {1, 2}))
57		breq1 5151	. . . . 5 ⊢ (𝑑 = 2 → (𝑑 ≤ 3 ↔ 2 ≤ 3))
58	55	sumeq1d 15652	. . . . . 6 ⊢ (𝑑 = 2 → Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘) = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))
59	58	eqeq2d 2742	. . . . 5 ⊢ (𝑑 = 2 → (4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘) ↔ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘)))
60	57, 59	anbi12d 630	. . . 4 ⊢ (𝑑 = 2 → ((𝑑 ≤ 3 ∧ 4 = Σ𝑘 ∈ (1...𝑑)(𝑓‘𝑘)) ↔ (2 ≤ 3 ∧ 4 = Σ𝑘 ∈ {1, 2} (𝑓‘𝑘))))
61	56, 60	rexeqbidv 3342	. . 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 3612	. 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 689	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 395 = wceq 1540 ∈ wcel 2105 ≠ wne 2939 ∃wrex 3069 Vcvv 3473 ⊆ wss 3948 {cpr 4630 ⟨cop 4634 class class class wbr 5148 ⟶wf 6539 ‘cfv 6543 (class class class)co 7412 ↑_m cmap 8824 ℂcc 11112 1c1 11115 + caddc 11117 ≤ cle 11254 ℕcn 12217 2c2 12272 3c3 12273 4c4 12274 ℤcz 12563 ...cfz 13489 Σcsu 15637 ℙcprime 16613

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-inf2 9640 ax-cnex 11170 ax-resscn 11171 ax-1cn 11172 ax-icn 11173 ax-addcl 11174 ax-addrcl 11175 ax-mulcl 11176 ax-mulrcl 11177 ax-mulcom 11178 ax-addass 11179 ax-mulass 11180 ax-distr 11181 ax-i2m1 11182 ax-1ne0 11183 ax-1rid 11184 ax-rnegex 11185 ax-rrecex 11186 ax-cnre 11187 ax-pre-lttri 11188 ax-pre-lttrn 11189 ax-pre-ltadd 11190 ax-pre-mulgt0 11191 ax-pre-sup 11192

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7860 df-1st 7979 df-2nd 7980 df-frecs 8270 df-wrecs 8301 df-recs 8375 df-rdg 8414 df-1o 8470 df-2o 8471 df-er 8707 df-map 8826 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-sup 9441 df-oi 9509 df-card 9938 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11451 df-neg 11452 df-div 11877 df-nn 12218 df-2 12280 df-3 12281 df-4 12282 df-n0 12478 df-z 12564 df-uz 12828 df-rp 12980 df-fz 13490 df-fzo 13633 df-seq 13972 df-exp 14033 df-hash 14296 df-cj 15051 df-re 15052 df-im 15053 df-sqrt 15187 df-abs 15188 df-clim 15437 df-sum 15638 df-dvds 16203 df-prm 16614

This theorem is referenced by: nnsum4primes4 46756 nnsum3primesle9 46761

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