Theorem ram0 15564

Description: The Ramsey number when 𝑅 = ∅. (Contributed by Mario Carneiro, 22-Apr-2015.)

Assertion

Ref	Expression
ram0	⊢ (𝑀 ∈ ℕ0 → (𝑀 Ramsey ∅) = 𝑀)

Proof of Theorem ram0

Dummy variables 𝑏 𝑓 𝑐 𝑠 𝑥 𝑎 𝑖 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2610	. . 3 ⊢ (𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖}) = (𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})
2		id 22	. . 3 ⊢ (𝑀 ∈ ℕ0 → 𝑀 ∈ ℕ0)
3		0ex 4718	. . . 4 ⊢ ∅ ∈ V
4	3	a1i 11	. . 3 ⊢ (𝑀 ∈ ℕ0 → ∅ ∈ V)
5		f0 5999	. . . 4 ⊢ ∅:∅⟶ℕ0
6	5	a1i 11	. . 3 ⊢ (𝑀 ∈ ℕ0 → ∅:∅⟶ℕ0)
7		f00 6000	. . . . 5 ⊢ (𝑓:(𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)⟶∅ ↔ (𝑓 = ∅ ∧ (𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = ∅))
8		vex 3176	. . . . . . . . . 10 ⊢ 𝑠 ∈ V
9		simpl 472	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → 𝑀 ∈ ℕ0)
10	1	hashbcval 15544	. . . . . . . . . 10 ⊢ ((𝑠 ∈ V ∧ 𝑀 ∈ ℕ0) → (𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = {𝑥 ∈ 𝒫 𝑠 ∣ (#‘𝑥) = 𝑀})
11	8, 9, 10	sylancr 694	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = {𝑥 ∈ 𝒫 𝑠 ∣ (#‘𝑥) = 𝑀})
12		hashfz1 12996	. . . . . . . . . . . . . . . 16 ⊢ (𝑀 ∈ ℕ0 → (#‘(1...𝑀)) = 𝑀)
13	12	breq1d 4593	. . . . . . . . . . . . . . 15 ⊢ (𝑀 ∈ ℕ0 → ((#‘(1...𝑀)) ≤ (#‘𝑠) ↔ 𝑀 ≤ (#‘𝑠)))
14	13	biimpar 501	. . . . . . . . . . . . . 14 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (#‘(1...𝑀)) ≤ (#‘𝑠))
15		fzfid 12634	. . . . . . . . . . . . . . 15 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (1...𝑀) ∈ Fin)
16		hashdom 13029	. . . . . . . . . . . . . . 15 ⊢ (((1...𝑀) ∈ Fin ∧ 𝑠 ∈ V) → ((#‘(1...𝑀)) ≤ (#‘𝑠) ↔ (1...𝑀) ≼ 𝑠))
17	15, 8, 16	sylancl 693	. . . . . . . . . . . . . 14 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → ((#‘(1...𝑀)) ≤ (#‘𝑠) ↔ (1...𝑀) ≼ 𝑠))
18	14, 17	mpbid 221	. . . . . . . . . . . . 13 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (1...𝑀) ≼ 𝑠)
19	8	domen 7854	. . . . . . . . . . . . 13 ⊢ ((1...𝑀) ≼ 𝑠 ↔ ∃𝑥((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠))
20	18, 19	sylib 207	. . . . . . . . . . . 12 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → ∃𝑥((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠))
21		simprr 792	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) ∧ ((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠)) → 𝑥 ⊆ 𝑠)
22		selpw 4115	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ 𝒫 𝑠 ↔ 𝑥 ⊆ 𝑠)
23	21, 22	sylibr 223	. . . . . . . . . . . . . . 15 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) ∧ ((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠)) → 𝑥 ∈ 𝒫 𝑠)
24		hasheni 12998	. . . . . . . . . . . . . . . . 17 ⊢ ((1...𝑀) ≈ 𝑥 → (#‘(1...𝑀)) = (#‘𝑥))
25	24	ad2antrl 760	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) ∧ ((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠)) → (#‘(1...𝑀)) = (#‘𝑥))
26	12	ad2antrr 758	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) ∧ ((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠)) → (#‘(1...𝑀)) = 𝑀)
27	25, 26	eqtr3d 2646	. . . . . . . . . . . . . . 15 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) ∧ ((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠)) → (#‘𝑥) = 𝑀)
28	23, 27	jca 553	. . . . . . . . . . . . . 14 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) ∧ ((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠)) → (𝑥 ∈ 𝒫 𝑠 ∧ (#‘𝑥) = 𝑀))
29	28	ex 449	. . . . . . . . . . . . 13 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠) → (𝑥 ∈ 𝒫 𝑠 ∧ (#‘𝑥) = 𝑀)))
30	29	eximdv 1833	. . . . . . . . . . . 12 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (∃𝑥((1...𝑀) ≈ 𝑥 ∧ 𝑥 ⊆ 𝑠) → ∃𝑥(𝑥 ∈ 𝒫 𝑠 ∧ (#‘𝑥) = 𝑀)))
31	20, 30	mpd 15	. . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → ∃𝑥(𝑥 ∈ 𝒫 𝑠 ∧ (#‘𝑥) = 𝑀))
32		df-rex 2902	. . . . . . . . . . 11 ⊢ (∃𝑥 ∈ 𝒫 𝑠(#‘𝑥) = 𝑀 ↔ ∃𝑥(𝑥 ∈ 𝒫 𝑠 ∧ (#‘𝑥) = 𝑀))
33	31, 32	sylibr 223	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → ∃𝑥 ∈ 𝒫 𝑠(#‘𝑥) = 𝑀)
34		rabn0 3912	. . . . . . . . . 10 ⊢ ({𝑥 ∈ 𝒫 𝑠 ∣ (#‘𝑥) = 𝑀} ≠ ∅ ↔ ∃𝑥 ∈ 𝒫 𝑠(#‘𝑥) = 𝑀)
35	33, 34	sylibr 223	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → {𝑥 ∈ 𝒫 𝑠 ∣ (#‘𝑥) = 𝑀} ≠ ∅)
36	11, 35	eqnetrd 2849	. . . . . . . 8 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ≠ ∅)
37	36	neneqd 2787	. . . . . . 7 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → ¬ (𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = ∅)
38	37	pm2.21d 117	. . . . . 6 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → ((𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = ∅ → ∃𝑐 ∈ ∅ ∃𝑥 ∈ 𝒫 𝑠((∅‘𝑐) ≤ (#‘𝑥) ∧ (𝑥(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ⊆ (◡𝑓 “ {𝑐}))))
39	38	adantld 482	. . . . 5 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → ((𝑓 = ∅ ∧ (𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = ∅) → ∃𝑐 ∈ ∅ ∃𝑥 ∈ 𝒫 𝑠((∅‘𝑐) ≤ (#‘𝑥) ∧ (𝑥(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ⊆ (◡𝑓 “ {𝑐}))))
40	7, 39	syl5bi 231	. . . 4 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ≤ (#‘𝑠)) → (𝑓:(𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)⟶∅ → ∃𝑐 ∈ ∅ ∃𝑥 ∈ 𝒫 𝑠((∅‘𝑐) ≤ (#‘𝑥) ∧ (𝑥(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ⊆ (◡𝑓 “ {𝑐}))))
41	40	impr 647	. . 3 ⊢ ((𝑀 ∈ ℕ0 ∧ (𝑀 ≤ (#‘𝑠) ∧ 𝑓:(𝑠(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)⟶∅)) → ∃𝑐 ∈ ∅ ∃𝑥 ∈ 𝒫 𝑠((∅‘𝑐) ≤ (#‘𝑥) ∧ (𝑥(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ⊆ (◡𝑓 “ {𝑐})))
42	1, 2, 4, 6, 2, 41	ramub 15555	. 2 ⊢ (𝑀 ∈ ℕ0 → (𝑀 Ramsey ∅) ≤ 𝑀)
43		nnnn0 11176	. . . . . 6 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℕ0)
44	3	a1i 11	. . . . . 6 ⊢ (𝑀 ∈ ℕ → ∅ ∈ V)
45	5	a1i 11	. . . . . 6 ⊢ (𝑀 ∈ ℕ → ∅:∅⟶ℕ0)
46		nnm1nn0 11211	. . . . . 6 ⊢ (𝑀 ∈ ℕ → (𝑀 − 1) ∈ ℕ0)
47		f0 5999	. . . . . . 7 ⊢ ∅:∅⟶∅
48		fzfid 12634	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → (1...(𝑀 − 1)) ∈ Fin)
49	1	hashbc2 15548	. . . . . . . . . . 11 ⊢ (((1...(𝑀 − 1)) ∈ Fin ∧ 𝑀 ∈ ℕ0) → (#‘((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)) = ((#‘(1...(𝑀 − 1)))C𝑀))
50	48, 43, 49	syl2anc 691	. . . . . . . . . 10 ⊢ (𝑀 ∈ ℕ → (#‘((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)) = ((#‘(1...(𝑀 − 1)))C𝑀))
51		hashfz1 12996	. . . . . . . . . . . 12 ⊢ ((𝑀 − 1) ∈ ℕ0 → (#‘(1...(𝑀 − 1))) = (𝑀 − 1))
52	46, 51	syl 17	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → (#‘(1...(𝑀 − 1))) = (𝑀 − 1))
53	52	oveq1d 6564	. . . . . . . . . 10 ⊢ (𝑀 ∈ ℕ → ((#‘(1...(𝑀 − 1)))C𝑀) = ((𝑀 − 1)C𝑀))
54		nnz 11276	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℤ)
55		nnre 10904	. . . . . . . . . . . . 13 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℝ)
56	55	ltm1d 10835	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ ℕ → (𝑀 − 1) < 𝑀)
57	56	olcd 407	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → (𝑀 < 0 ∨ (𝑀 − 1) < 𝑀))
58		bcval4 12956	. . . . . . . . . . 11 ⊢ (((𝑀 − 1) ∈ ℕ0 ∧ 𝑀 ∈ ℤ ∧ (𝑀 < 0 ∨ (𝑀 − 1) < 𝑀)) → ((𝑀 − 1)C𝑀) = 0)
59	46, 54, 57, 58	syl3anc 1318	. . . . . . . . . 10 ⊢ (𝑀 ∈ ℕ → ((𝑀 − 1)C𝑀) = 0)
60	50, 53, 59	3eqtrd 2648	. . . . . . . . 9 ⊢ (𝑀 ∈ ℕ → (#‘((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)) = 0)
61		ovex 6577	. . . . . . . . . 10 ⊢ ((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ∈ V
62		hasheq0 13015	. . . . . . . . . 10 ⊢ (((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ∈ V → ((#‘((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)) = 0 ↔ ((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = ∅))
63	61, 62	ax-mp 5	. . . . . . . . 9 ⊢ ((#‘((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)) = 0 ↔ ((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = ∅)
64	60, 63	sylib 207	. . . . . . . 8 ⊢ (𝑀 ∈ ℕ → ((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) = ∅)
65	64	feq2d 5944	. . . . . . 7 ⊢ (𝑀 ∈ ℕ → (∅:((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)⟶∅ ↔ ∅:∅⟶∅))
66	47, 65	mpbiri 247	. . . . . 6 ⊢ (𝑀 ∈ ℕ → ∅:((1...(𝑀 − 1))(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀)⟶∅)
67		noel 3878	. . . . . . . 8 ⊢ ¬ 𝑐 ∈ ∅
68	67	pm2.21i 115	. . . . . . 7 ⊢ (𝑐 ∈ ∅ → ((𝑥(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ⊆ (◡∅ “ {𝑐}) → (#‘𝑥) < (∅‘𝑐)))
69	68	ad2antrl 760	. . . . . 6 ⊢ ((𝑀 ∈ ℕ ∧ (𝑐 ∈ ∅ ∧ 𝑥 ⊆ (1...(𝑀 − 1)))) → ((𝑥(𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (#‘𝑏) = 𝑖})𝑀) ⊆ (◡∅ “ {𝑐}) → (#‘𝑥) < (∅‘𝑐)))
70	1, 43, 44, 45, 46, 66, 69	ramlb 15561	. . . . 5 ⊢ (𝑀 ∈ ℕ → (𝑀 − 1) < (𝑀 Ramsey ∅))
71		ramubcl 15560	. . . . . . . 8 ⊢ (((𝑀 ∈ ℕ0 ∧ ∅ ∈ V ∧ ∅:∅⟶ℕ0) ∧ (𝑀 ∈ ℕ0 ∧ (𝑀 Ramsey ∅) ≤ 𝑀)) → (𝑀 Ramsey ∅) ∈ ℕ0)
72	2, 4, 6, 2, 42, 71	syl32anc 1326	. . . . . . 7 ⊢ (𝑀 ∈ ℕ0 → (𝑀 Ramsey ∅) ∈ ℕ0)
73	43, 72	syl 17	. . . . . 6 ⊢ (𝑀 ∈ ℕ → (𝑀 Ramsey ∅) ∈ ℕ0)
74		nn0lem1lt 11318	. . . . . 6 ⊢ ((𝑀 ∈ ℕ0 ∧ (𝑀 Ramsey ∅) ∈ ℕ0) → (𝑀 ≤ (𝑀 Ramsey ∅) ↔ (𝑀 − 1) < (𝑀 Ramsey ∅)))
75	43, 73, 74	syl2anc 691	. . . . 5 ⊢ (𝑀 ∈ ℕ → (𝑀 ≤ (𝑀 Ramsey ∅) ↔ (𝑀 − 1) < (𝑀 Ramsey ∅)))
76	70, 75	mpbird 246	. . . 4 ⊢ (𝑀 ∈ ℕ → 𝑀 ≤ (𝑀 Ramsey ∅))
77	76	a1i 11	. . 3 ⊢ (𝑀 ∈ ℕ0 → (𝑀 ∈ ℕ → 𝑀 ≤ (𝑀 Ramsey ∅)))
78	72	nn0ge0d 11231	. . . 4 ⊢ (𝑀 ∈ ℕ0 → 0 ≤ (𝑀 Ramsey ∅))
79		breq1 4586	. . . 4 ⊢ (𝑀 = 0 → (𝑀 ≤ (𝑀 Ramsey ∅) ↔ 0 ≤ (𝑀 Ramsey ∅)))
80	78, 79	syl5ibrcom 236	. . 3 ⊢ (𝑀 ∈ ℕ0 → (𝑀 = 0 → 𝑀 ≤ (𝑀 Ramsey ∅)))
81		elnn0 11171	. . . 4 ⊢ (𝑀 ∈ ℕ0 ↔ (𝑀 ∈ ℕ ∨ 𝑀 = 0))
82	81	biimpi 205	. . 3 ⊢ (𝑀 ∈ ℕ0 → (𝑀 ∈ ℕ ∨ 𝑀 = 0))
83	77, 80, 82	mpjaod 395	. 2 ⊢ (𝑀 ∈ ℕ0 → 𝑀 ≤ (𝑀 Ramsey ∅))
84	72	nn0red 11229	. . 3 ⊢ (𝑀 ∈ ℕ0 → (𝑀 Ramsey ∅) ∈ ℝ)
85		nn0re 11178	. . 3 ⊢ (𝑀 ∈ ℕ0 → 𝑀 ∈ ℝ)
86	84, 85	letri3d 10058	. 2 ⊢ (𝑀 ∈ ℕ0 → ((𝑀 Ramsey ∅) = 𝑀 ↔ ((𝑀 Ramsey ∅) ≤ 𝑀 ∧ 𝑀 ≤ (𝑀 Ramsey ∅))))
87	42, 83, 86	mpbir2and 959	1 ⊢ (𝑀 ∈ ℕ0 → (𝑀 Ramsey ∅) = 𝑀)

Syntax hints:   → wi 4   ↔ wb 195   ∨ wo 382   ∧ wa 383   = wceq 1475  ∃wex 1695   ∈ wcel 1977   ≠ wne 2780  ∃wrex 2897  {crab 2900  Vcvv 3173   ⊆ wss 3540  ∅c0 3874  𝒫 cpw 4108  {csn 4125   class class class wbr 4583  ^◡ccnv 5037   “ cima 5041  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ↦ cmpt2 6551   ≈ cen 7838   ≼ cdom 7839  Fincfn 7841  0cc0 9815  1c1 9816   < clt 9953   ≤ cle 9954   − cmin 10145  ℕcn 10897  ℕ₀cn0 11169  ℤcz 11254  ...cfz 12197  Ccbc 12951  #chash 12979   Ramsey cram 15541

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-2o 7448  df-oadd 7451  df-er 7629  df-map 7746  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-sup 8231  df-inf 8232  df-card 8648  df-cda 8873  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-div 10564  df-nn 10898  df-n0 11170  df-xnn0 11241  df-z 11255  df-uz 11564  df-rp 11709  df-fz 12198  df-seq 12664  df-fac 12923  df-bc 12952  df-hash 12980  df-ram 15543

This theorem is referenced by:  0ramcl  15565  ramcl  15571