Theorem axccdom 45674

Description: Relax the constraint on ax-cc to dominance instead of equinumerosity. (Contributed by Glauco Siliprandi, 26-Jun-2021.)

Hypotheses

Ref	Expression
axccdom.1	⊢ (𝜑 → 𝑋 ≼ ω)
axccdom.2	⊢ ((𝜑 ∧ 𝑧 ∈ 𝑋) → 𝑧 ≠ ∅)

Assertion

Ref	Expression
axccdom	⊢ (𝜑 → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))

Distinct variable groups:   𝑓,𝑋,𝑧   𝜑,𝑧

Allowed substitution hint:   𝜑(𝑓)

Proof of Theorem axccdom

Dummy variables 𝑔 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpr 485	. . 3 ⊢ ((𝜑 ∧ 𝑋 ∈ Fin) → 𝑋 ∈ Fin)
2		simpr 485	. . 3 ⊢ (((𝜑 ∧ 𝑋 ∈ Fin) ∧ 𝑧 ∈ 𝑋) → 𝑧 ∈ 𝑋)
3		axccdom.2	. . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑋) → 𝑧 ≠ ∅)
4	3	adantlr 721	. . 3 ⊢ (((𝜑 ∧ 𝑋 ∈ Fin) ∧ 𝑧 ∈ 𝑋) → 𝑧 ≠ ∅)
5	1, 2, 4	choicefi 45653	. 2 ⊢ ((𝜑 ∧ 𝑋 ∈ Fin) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
6		axccdom.1	. . . . . 6 ⊢ (𝜑 → 𝑋 ≼ ω)
7	6	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → 𝑋 ≼ ω)
8		isfinite2 9205	. . . . . . 7 ⊢ (𝑋 ≺ ω → 𝑋 ∈ Fin)
9	8	con3i 154	. . . . . 6 ⊢ (¬ 𝑋 ∈ Fin → ¬ 𝑋 ≺ ω)
10	9	adantl 482	. . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → ¬ 𝑋 ≺ ω)
11	7, 10	jca 516	. . . 4 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → (𝑋 ≼ ω ∧ ¬ 𝑋 ≺ ω))
12		bren2 8927	. . . 4 ⊢ (𝑋 ≈ ω ↔ (𝑋 ≼ ω ∧ ¬ 𝑋 ≺ ω))
13	11, 12	sylibr 235	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → 𝑋 ≈ ω)
14		ctex 8907	. . . . . . 7 ⊢ (𝑋 ≼ ω → 𝑋 ∈ V)
15	6, 14	syl 17	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ V)
16	15	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → 𝑋 ∈ V)
17		simpr 485	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → 𝑋 ≈ ω)
18		breq1 5082	. . . . . . 7 ⊢ (𝑥 = 𝑋 → (𝑥 ≈ ω ↔ 𝑋 ≈ ω))
19		raleq 3295	. . . . . . . 8 ⊢ (𝑥 = 𝑋 → (∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) ↔ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)))
20	19	exbidv 1928	. . . . . . 7 ⊢ (𝑥 = 𝑋 → (∃𝑔∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) ↔ ∃𝑔∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)))
21	18, 20	imbi12d 345	. . . . . 6 ⊢ (𝑥 = 𝑋 → ((𝑥 ≈ ω → ∃𝑔∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ↔ (𝑋 ≈ ω → ∃𝑔∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))))
22		ax-cc 10355	. . . . . 6 ⊢ (𝑥 ≈ ω → ∃𝑔∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
23	21, 22	vtoclg 3502	. . . . 5 ⊢ (𝑋 ∈ V → (𝑋 ≈ ω → ∃𝑔∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)))
24	16, 17, 23	sylc 65	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → ∃𝑔∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
25	15	mptexd 7175	. . . . . . . . 9 ⊢ (𝜑 → (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) ∈ V)
26	25	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) ∈ V)
27		fvex 6847	. . . . . . . . . . . 12 ⊢ (𝑔‘𝑧) ∈ V
28	27	rgenw 3058	. . . . . . . . . . 11 ⊢ ∀𝑧 ∈ 𝑋 (𝑔‘𝑧) ∈ V
29		eqid 2740	. . . . . . . . . . . 12 ⊢ (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))
30	29	fnmpt 6632	. . . . . . . . . . 11 ⊢ (∀𝑧 ∈ 𝑋 (𝑔‘𝑧) ∈ V → (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋)
31	28, 30	ax-mp 5	. . . . . . . . . 10 ⊢ (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋
32	31	a1i 11	. . . . . . . . 9 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋)
33		nfv 1921	. . . . . . . . . . 11 ⊢ Ⅎ𝑧𝜑
34		nfra1 3264	. . . . . . . . . . 11 ⊢ Ⅎ𝑧∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)
35	33, 34	nfan 1906	. . . . . . . . . 10 ⊢ Ⅎ𝑧(𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
36		id 22	. . . . . . . . . . . . . 14 ⊢ (𝑧 ∈ 𝑋 → 𝑧 ∈ 𝑋)
37	27	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝑧 ∈ 𝑋 → (𝑔‘𝑧) ∈ V)
38	29	fvmpt2 6954	. . . . . . . . . . . . . 14 ⊢ ((𝑧 ∈ 𝑋 ∧ (𝑔‘𝑧) ∈ V) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) = (𝑔‘𝑧))
39	36, 37, 38	syl2anc 590	. . . . . . . . . . . . 13 ⊢ (𝑧 ∈ 𝑋 → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) = (𝑔‘𝑧))
40	39	adantl 482	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) = (𝑔‘𝑧))
41		rspa 3229	. . . . . . . . . . . . . 14 ⊢ ((∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) ∧ 𝑧 ∈ 𝑋) → (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
42	41	adantll 720	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
43	3	adantlr 721	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → 𝑧 ≠ ∅)
44		id 22	. . . . . . . . . . . . 13 ⊢ ((𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) → (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
45	42, 43, 44	sylc 65	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → (𝑔‘𝑧) ∈ 𝑧)
46	40, 45	eqeltrd 2840	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧)
47	46	ex 413	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → (𝑧 ∈ 𝑋 → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
48	35, 47	ralrimi 3238	. . . . . . . . 9 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧)
49	32, 48	jca 516	. . . . . . . 8 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
50		fneq1 6583	. . . . . . . . . 10 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → (𝑓 Fn 𝑋 ↔ (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋))
51		nfcv 2902	. . . . . . . . . . . 12 ⊢ Ⅎ𝑧𝑓
52		nfmpt1 5178	. . . . . . . . . . . 12 ⊢ Ⅎ𝑧(𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))
53	51, 52	nfeq 2915	. . . . . . . . . . 11 ⊢ Ⅎ𝑧 𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))
54		fveq1 6833	. . . . . . . . . . . 12 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → (𝑓‘𝑧) = ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧))
55	54	eleq1d 2825	. . . . . . . . . . 11 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → ((𝑓‘𝑧) ∈ 𝑧 ↔ ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
56	53, 55	ralbid 3253	. . . . . . . . . 10 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → (∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧 ↔ ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
57	50, 56	anbi12d 638	. . . . . . . . 9 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → ((𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧) ↔ ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧)))
58	57	spcegv 3542	. . . . . . . 8 ⊢ ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) ∈ V → (((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧)))
59	26, 49, 58	sylc 65	. . . . . . 7 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
60	59	adantlr 721	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≈ ω) ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
61	60	ex 413	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → (∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧)))
62	61	exlimdv 1940	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → (∃𝑔∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧)))
63	24, 62	mpd 15	. . 3 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
64	13, 63	syldan 597	. 2 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
65	5, 64	pm2.61dan 818	1 ⊢ (𝜑 → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 396   = wceq 1547  ∃wex 1786   ∈ wcel 2119   ≠ wne 2935  ∀wral 3054  Vcvv 3432  ∅c0 4268   class class class wbr 5079   ↦ cmpt 5160   Fn wfn 6487  ‘cfv 6492  ωcom 7813   ≈ cen 8887   ≼ cdom 8888   ≺ csdm 8889  Fincfn 8890

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2712  ax-rep 5206  ax-sep 5225  ax-nul 5235  ax-pow 5301  ax-pr 5369  ax-un 7685  ax-cc 10355

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3or 1093  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2719  df-cleq 2732  df-clel 2815  df-nfc 2889  df-ne 2936  df-ral 3055  df-rex 3065  df-reu 3346  df-rab 3393  df-v 3434  df-sbc 3731  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-pss 3910  df-nul 4269  df-if 4462  df-pw 4538  df-sn 4563  df-pr 4565  df-op 4569  df-uni 4846  df-int 4885  df-iun 4930  df-br 5080  df-opab 5142  df-mpt 5161  df-tr 5187  df-id 5520  df-eprel 5525  df-po 5533  df-so 5534  df-fr 5578  df-we 5580  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-ima 5638  df-pred 6259  df-ord 6320  df-on 6321  df-lim 6322  df-suc 6323  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-ov 7366  df-om 7814  df-1st 7938  df-2nd 7939  df-frecs 8228  df-wrecs 8259  df-recs 8308  df-rdg 8346  df-1o 8402  df-er 8640  df-en 8891  df-dom 8892  df-sdom 8893  df-fin 8894

This theorem is referenced by:  subsaliuncl  46808