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Theorem ramlb 16956

Description: Establish a lower bound on a Ramsey number. (Contributed by Mario Carneiro, 22-Apr-2015.)

**Hypotheses**
Ref	Expression
ramlb.c	⊢ 𝐶 = (𝑎 ∈ V, 𝑖 ∈ ℕ₀ ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (♯‘𝑏) = 𝑖})
ramlb.m	⊢ (𝜑 → 𝑀 ∈ ℕ₀)
ramlb.r	⊢ (𝜑 → 𝑅 ∈ 𝑉)
ramlb.f	⊢ (𝜑 → 𝐹:𝑅⟶ℕ₀)
ramlb.s	⊢ (𝜑 → 𝑁 ∈ ℕ₀)
ramlb.g	⊢ (𝜑 → 𝐺:((1...𝑁)𝐶𝑀)⟶𝑅)
ramlb.i	⊢ ((𝜑 ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → ((𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐}) → (♯‘𝑥) < (𝐹‘𝑐)))

**Assertion**
Ref	Expression
ramlb	⊢ (𝜑 → 𝑁 < (𝑀 Ramsey 𝐹))

Distinct variable groups: 𝑥,𝑐,𝐶 𝐹,𝑐,𝑥 𝐺,𝑐,𝑥 𝑎,𝑏,𝑐,𝑖,𝑥,𝑀 𝜑,𝑐,𝑥 𝑁,𝑐,𝑥 𝑅,𝑐,𝑥 𝑉,𝑐,𝑥 Allowed substitution hints: 𝜑(𝑖,𝑎,𝑏) 𝐶(𝑖,𝑎,𝑏) 𝑅(𝑖,𝑎,𝑏) 𝐹(𝑖,𝑎,𝑏) 𝐺(𝑖,𝑎,𝑏) 𝑁(𝑖,𝑎,𝑏) 𝑉(𝑖,𝑎,𝑏)

**Proof of Theorem ramlb**
Step	Hyp	Ref	Expression
1		ramlb.c	. . . . 5 ⊢ 𝐶 = (𝑎 ∈ V, 𝑖 ∈ ℕ₀ ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (♯‘𝑏) = 𝑖})
2		ramlb.m	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℕ₀)
3	2	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → 𝑀 ∈ ℕ₀)
4		ramlb.r	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ 𝑉)
5	4	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → 𝑅 ∈ 𝑉)
6		ramlb.f	. . . . . 6 ⊢ (𝜑 → 𝐹:𝑅⟶ℕ₀)
7	6	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → 𝐹:𝑅⟶ℕ₀)
8		ramlb.s	. . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
9	8	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → 𝑁 ∈ ℕ₀)
10		simpr 485	. . . . . 6 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → (𝑀 Ramsey 𝐹) ≤ 𝑁)
11		ramubcl 16955	. . . . . 6 ⊢ (((𝑀 ∈ ℕ₀ ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ₀) ∧ (𝑁 ∈ ℕ₀ ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁)) → (𝑀 Ramsey 𝐹) ∈ ℕ₀)
12	3, 5, 7, 9, 10, 11	syl32anc 1378	. . . . 5 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → (𝑀 Ramsey 𝐹) ∈ ℕ₀)
13		fzfid 13942	. . . . 5 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → (1...𝑁) ∈ Fin)
14		hashfz1 14310	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ₀ → (♯‘(1...𝑁)) = 𝑁)
15	8, 14	syl 17	. . . . . . 7 ⊢ (𝜑 → (♯‘(1...𝑁)) = 𝑁)
16	15	breq2d 5160	. . . . . 6 ⊢ (𝜑 → ((𝑀 Ramsey 𝐹) ≤ (♯‘(1...𝑁)) ↔ (𝑀 Ramsey 𝐹) ≤ 𝑁))
17	16	biimpar 478	. . . . 5 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → (𝑀 Ramsey 𝐹) ≤ (♯‘(1...𝑁)))
18		ramlb.g	. . . . . 6 ⊢ (𝜑 → 𝐺:((1...𝑁)𝐶𝑀)⟶𝑅)
19	18	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → 𝐺:((1...𝑁)𝐶𝑀)⟶𝑅)
20	1, 3, 5, 7, 12, 13, 17, 19	rami 16952	. . . 4 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → ∃𝑐 ∈ 𝑅 ∃𝑥 ∈ 𝒫 (1...𝑁)((𝐹‘𝑐) ≤ (♯‘𝑥) ∧ (𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐})))
21		elpwi 4609	. . . . . . . . 9 ⊢ (𝑥 ∈ 𝒫 (1...𝑁) → 𝑥 ⊆ (1...𝑁))
22		ramlb.i	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → ((𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐}) → (♯‘𝑥) < (𝐹‘𝑐)))
23	22	adantlr 713	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → ((𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐}) → (♯‘𝑥) < (𝐹‘𝑐)))
24		fzfid 13942	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → (1...𝑁) ∈ Fin)
25		simprr 771	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → 𝑥 ⊆ (1...𝑁))
26	24, 25	ssfid 9269	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → 𝑥 ∈ Fin)
27		hashcl 14320	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ Fin → (♯‘𝑥) ∈ ℕ₀)
28	26, 27	syl 17	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → (♯‘𝑥) ∈ ℕ₀)
29	28	nn0red 12537	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → (♯‘𝑥) ∈ ℝ)
30		simpl 483	. . . . . . . . . . . . 13 ⊢ ((𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁)) → 𝑐 ∈ 𝑅)
31		ffvelcdm 7083	. . . . . . . . . . . . 13 ⊢ ((𝐹:𝑅⟶ℕ₀ ∧ 𝑐 ∈ 𝑅) → (𝐹‘𝑐) ∈ ℕ₀)
32	7, 30, 31	syl2an 596	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → (𝐹‘𝑐) ∈ ℕ₀)
33	32	nn0red 12537	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → (𝐹‘𝑐) ∈ ℝ)
34	29, 33	ltnled 11365	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → ((♯‘𝑥) < (𝐹‘𝑐) ↔ ¬ (𝐹‘𝑐) ≤ (♯‘𝑥)))
35	23, 34	sylibd 238	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ⊆ (1...𝑁))) → ((𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐}) → ¬ (𝐹‘𝑐) ≤ (♯‘𝑥)))
36	21, 35	sylanr2 681	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ∈ 𝒫 (1...𝑁))) → ((𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐}) → ¬ (𝐹‘𝑐) ≤ (♯‘𝑥)))
37	36	con2d 134	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ∈ 𝒫 (1...𝑁))) → ((𝐹‘𝑐) ≤ (♯‘𝑥) → ¬ (𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐})))
38		imnan 400	. . . . . . 7 ⊢ (((𝐹‘𝑐) ≤ (♯‘𝑥) → ¬ (𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐})) ↔ ¬ ((𝐹‘𝑐) ≤ (♯‘𝑥) ∧ (𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐})))
39	37, 38	sylib 217	. . . . . 6 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ∈ 𝒫 (1...𝑁))) → ¬ ((𝐹‘𝑐) ≤ (♯‘𝑥) ∧ (𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐})))
40	39	pm2.21d 121	. . . . 5 ⊢ (((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) ∧ (𝑐 ∈ 𝑅 ∧ 𝑥 ∈ 𝒫 (1...𝑁))) → (((𝐹‘𝑐) ≤ (♯‘𝑥) ∧ (𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐})) → ¬ (𝑀 Ramsey 𝐹) ≤ 𝑁))
41	40	rexlimdvva 3211	. . . 4 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → (∃𝑐 ∈ 𝑅 ∃𝑥 ∈ 𝒫 (1...𝑁)((𝐹‘𝑐) ≤ (♯‘𝑥) ∧ (𝑥𝐶𝑀) ⊆ (^◡𝐺 “ {𝑐})) → ¬ (𝑀 Ramsey 𝐹) ≤ 𝑁))
42	20, 41	mpd 15	. . 3 ⊢ ((𝜑 ∧ (𝑀 Ramsey 𝐹) ≤ 𝑁) → ¬ (𝑀 Ramsey 𝐹) ≤ 𝑁)
43	42	pm2.01da 797	. 2 ⊢ (𝜑 → ¬ (𝑀 Ramsey 𝐹) ≤ 𝑁)
44	8	nn0red 12537	. . . 4 ⊢ (𝜑 → 𝑁 ∈ ℝ)
45	44	rexrd 11268	. . 3 ⊢ (𝜑 → 𝑁 ∈ ℝ^*)
46		ramxrcl 16954	. . . 4 ⊢ ((𝑀 ∈ ℕ₀ ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ₀) → (𝑀 Ramsey 𝐹) ∈ ℝ^*)
47	2, 4, 6, 46	syl3anc 1371	. . 3 ⊢ (𝜑 → (𝑀 Ramsey 𝐹) ∈ ℝ^*)
48		xrltnle 11285	. . 3 ⊢ ((𝑁 ∈ ℝ^* ∧ (𝑀 Ramsey 𝐹) ∈ ℝ^*) → (𝑁 < (𝑀 Ramsey 𝐹) ↔ ¬ (𝑀 Ramsey 𝐹) ≤ 𝑁))
49	45, 47, 48	syl2anc 584	. 2 ⊢ (𝜑 → (𝑁 < (𝑀 Ramsey 𝐹) ↔ ¬ (𝑀 Ramsey 𝐹) ≤ 𝑁))
50	43, 49	mpbird 256	1 ⊢ (𝜑 → 𝑁 < (𝑀 Ramsey 𝐹))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∃wrex 3070 {crab 3432 Vcvv 3474 ⊆ wss 3948 𝒫 cpw 4602 {csn 4628 class class class wbr 5148 ^◡ccnv 5675 “ cima 5679 ⟶wf 6539 ‘cfv 6543 (class class class)co 7411 ∈ cmpo 7413 Fincfn 8941 1c1 11113 ℝ^*cxr 11251 < clt 11252 ≤ cle 11253 ℕ₀cn0 12476 ...cfz 13488 ♯chash 14294 Ramsey cram 16936

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 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-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-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-er 8705 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-sup 9439 df-inf 9440 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-n0 12477 df-z 12563 df-uz 12827 df-fz 13489 df-hash 14295 df-ram 16938

This theorem is referenced by: 0ram 16957 ram0 16959

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