Theorem axccdom 45679

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 486	. . 3 ⊢ ((𝜑 ∧ 𝑋 ∈ Fin) → 𝑋 ∈ Fin)
2		simpr 486	. . 3 ⊢ (((𝜑 ∧ 𝑋 ∈ Fin) ∧ 𝑧 ∈ 𝑋) → 𝑧 ∈ 𝑋)
3		axccdom.2	. . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑋) → 𝑧 ≠ ∅)
4	3	adantlr 722	. . 3 ⊢ (((𝜑 ∧ 𝑋 ∈ Fin) ∧ 𝑧 ∈ 𝑋) → 𝑧 ≠ ∅)
5	1, 2, 4	choicefi 45658	. 2 ⊢ ((𝜑 ∧ 𝑋 ∈ Fin) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
6		axccdom.1	. . . . . 6 ⊢ (𝜑 → 𝑋 ≼ ω)
7	6	adantr 482	. . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → 𝑋 ≼ ω)
8		isfinite2 9202	. . . . . . 7 ⊢ (𝑋 ≺ ω → 𝑋 ∈ Fin)
9	8	con3i 154	. . . . . 6 ⊢ (¬ 𝑋 ∈ Fin → ¬ 𝑋 ≺ ω)
10	9	adantl 483	. . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → ¬ 𝑋 ≺ ω)
11	7, 10	jca 517	. . . 4 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → (𝑋 ≼ ω ∧ ¬ 𝑋 ≺ ω))
12		bren2 8924	. . . 4 ⊢ (𝑋 ≈ ω ↔ (𝑋 ≼ ω ∧ ¬ 𝑋 ≺ ω))
13	11, 12	sylibr 236	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → 𝑋 ≈ ω)
14		ctex 8904	. . . . . . 7 ⊢ (𝑋 ≼ ω → 𝑋 ∈ V)
15	6, 14	syl 17	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ V)
16	15	adantr 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → 𝑋 ∈ V)
17		simpr 486	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → 𝑋 ≈ ω)
18		breq1 5077	. . . . . . 7 ⊢ (𝑥 = 𝑋 → (𝑥 ≈ ω ↔ 𝑋 ≈ ω))
19		raleq 3296	. . . . . . . 8 ⊢ (𝑥 = 𝑋 → (∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) ↔ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)))
20	19	exbidv 1929	. . . . . . 7 ⊢ (𝑥 = 𝑋 → (∃𝑔∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) ↔ ∃𝑔∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)))
21	18, 20	imbi12d 346	. . . . . 6 ⊢ (𝑥 = 𝑋 → ((𝑥 ≈ ω → ∃𝑔∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ↔ (𝑋 ≈ ω → ∃𝑔∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))))
22		ax-cc 10353	. . . . . 6 ⊢ (𝑥 ≈ ω → ∃𝑔∀𝑧 ∈ 𝑥 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
23	21, 22	vtoclg 3501	. . . . 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 7171	. . . . . . . . 9 ⊢ (𝜑 → (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) ∈ V)
26	25	adantr 482	. . . . . . . 8 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) ∈ V)
27		fvex 6843	. . . . . . . . . . . 12 ⊢ (𝑔‘𝑧) ∈ V
28	27	rgenw 3059	. . . . . . . . . . 11 ⊢ ∀𝑧 ∈ 𝑋 (𝑔‘𝑧) ∈ V
29		eqid 2741	. . . . . . . . . . . 12 ⊢ (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))
30	29	fnmpt 6628	. . . . . . . . . . 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 1922	. . . . . . . . . . 11 ⊢ Ⅎ𝑧𝜑
34		nfra1 3265	. . . . . . . . . . 11 ⊢ Ⅎ𝑧∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)
35	33, 34	nfan 1907	. . . . . . . . . 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 6950	. . . . . . . . . . . . . 14 ⊢ ((𝑧 ∈ 𝑋 ∧ (𝑔‘𝑧) ∈ V) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) = (𝑔‘𝑧))
39	36, 37, 38	syl2anc 591	. . . . . . . . . . . . 13 ⊢ (𝑧 ∈ 𝑋 → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) = (𝑔‘𝑧))
40	39	adantl 483	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) = (𝑔‘𝑧))
41		rspa 3230	. . . . . . . . . . . . . 14 ⊢ ((∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) ∧ 𝑧 ∈ 𝑋) → (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
42	41	adantll 721	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧))
43	3	adantlr 722	. . . . . . . . . . . . 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 2841	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) ∧ 𝑧 ∈ 𝑋) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧)
47	46	ex 414	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → (𝑧 ∈ 𝑋 → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
48	35, 47	ralrimi 3239	. . . . . . . . 9 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧)
49	32, 48	jca 517	. . . . . . . 8 ⊢ ((𝜑 ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
50		fneq1 6579	. . . . . . . . . 10 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → (𝑓 Fn 𝑋 ↔ (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) Fn 𝑋))
51		nfcv 2903	. . . . . . . . . . . 12 ⊢ Ⅎ𝑧𝑓
52		nfmpt1 5173	. . . . . . . . . . . 12 ⊢ Ⅎ𝑧(𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))
53	51, 52	nfeq 2916	. . . . . . . . . . 11 ⊢ Ⅎ𝑧 𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))
54		fveq1 6829	. . . . . . . . . . . 12 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → (𝑓‘𝑧) = ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧))
55	54	eleq1d 2826	. . . . . . . . . . 11 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → ((𝑓‘𝑧) ∈ 𝑧 ↔ ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
56	53, 55	ralbid 3254	. . . . . . . . . 10 ⊢ (𝑓 = (𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧)) → (∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧 ↔ ∀𝑧 ∈ 𝑋 ((𝑧 ∈ 𝑋 ↦ (𝑔‘𝑧))‘𝑧) ∈ 𝑧))
57	50, 56	anbi12d 639	. . . . . . . . 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 3536	. . . . . . . 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 722	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≈ ω) ∧ ∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧)) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
61	60	ex 414	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≈ ω) → (∀𝑧 ∈ 𝑋 (𝑧 ≠ ∅ → (𝑔‘𝑧) ∈ 𝑧) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧)))
62	61	exlimdv 1941	. . . 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 598	. 2 ⊢ ((𝜑 ∧ ¬ 𝑋 ∈ Fin) → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))
65	5, 64	pm2.61dan 819	1 ⊢ (𝜑 → ∃𝑓(𝑓 Fn 𝑋 ∧ ∀𝑧 ∈ 𝑋 (𝑓‘𝑧) ∈ 𝑧))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 397   = wceq 1548  ∃wex 1787   ∈ wcel 2121   ≠ wne 2936  ∀wral 3055  Vcvv 3433  ∅c0 4263   class class class wbr 5074   ↦ cmpt 5155   Fn wfn 6483  ‘cfv 6488  ωcom 7809   ≈ cen 8884   ≼ cdom 8885   ≺ csdm 8886  Fincfn 8887

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1975  ax-7 2016  ax-8 2123  ax-9 2131  ax-10 2154  ax-11 2170  ax-12 2191  ax-ext 2713  ax-rep 5201  ax-sep 5220  ax-nul 5230  ax-pow 5296  ax-pr 5364  ax-un 7681  ax-cc 10353

This theorem depends on definitions:  df-bi 209  df-an 398  df-or 855  df-3or 1094  df-3an 1095  df-tru 1551  df-fal 1561  df-ex 1788  df-nf 1792  df-sb 2075  df-mo 2545  df-eu 2575  df-clab 2720  df-cleq 2733  df-clel 2816  df-nfc 2890  df-ne 2937  df-ral 3056  df-rex 3066  df-reu 3347  df-rab 3394  df-v 3435  df-sbc 3725  df-csb 3833  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-pss 3904  df-nul 4264  df-if 4457  df-pw 4533  df-sn 4558  df-pr 4560  df-op 4564  df-uni 4841  df-int 4880  df-iun 4925  df-br 5075  df-opab 5137  df-mpt 5156  df-tr 5182  df-id 5515  df-eprel 5520  df-po 5528  df-so 5529  df-fr 5573  df-we 5575  df-xp 5626  df-rel 5627  df-cnv 5628  df-co 5629  df-dm 5630  df-rn 5631  df-res 5632  df-ima 5633  df-pred 6255  df-ord 6316  df-on 6317  df-lim 6318  df-suc 6319  df-iota 6444  df-fun 6490  df-fn 6491  df-f 6492  df-f1 6493  df-fo 6494  df-f1o 6495  df-fv 6496  df-ov 7362  df-om 7810  df-1st 7933  df-2nd 7934  df-frecs 8224  df-wrecs 8255  df-recs 8304  df-rdg 8343  df-1o 8399  df-er 8637  df-en 8888  df-dom 8889  df-sdom 8890  df-fin 8891

This theorem is referenced by:  subsaliuncl  46813