Theorem dftpos4 7894

Description: Alternate definition of tpos. (Contributed by Mario Carneiro, 4-Oct-2015.)

Assertion

Ref	Expression
dftpos4	⊢ tpos 𝐹 = (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}))

Distinct variable group:   𝑥,𝐹

Proof of Theorem dftpos4

Dummy variables 𝑦 𝑤 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-tpos 7875	. . 3 ⊢ tpos 𝐹 = (𝐹 ∘ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥}))
2		relcnv 5934	. . . . . . 7 ⊢ Rel ◡dom 𝐹
3		df-rel 5526	. . . . . . 7 ⊢ (Rel ◡dom 𝐹 ↔ ◡dom 𝐹 ⊆ (V × V))
4	2, 3	mpbi 233	. . . . . 6 ⊢ ◡dom 𝐹 ⊆ (V × V)
5		unss1 4106	. . . . . 6 ⊢ (◡dom 𝐹 ⊆ (V × V) → (◡dom 𝐹 ∪ {∅}) ⊆ ((V × V) ∪ {∅}))
6		resmpt 5872	. . . . . 6 ⊢ ((◡dom 𝐹 ∪ {∅}) ⊆ ((V × V) ∪ {∅}) → ((𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}) ↾ (◡dom 𝐹 ∪ {∅})) = (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥}))
7	4, 5, 6	mp2b 10	. . . . 5 ⊢ ((𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}) ↾ (◡dom 𝐹 ∪ {∅})) = (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})
8		resss 5843	. . . . 5 ⊢ ((𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}) ↾ (◡dom 𝐹 ∪ {∅})) ⊆ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})
9	7, 8	eqsstrri 3950	. . . 4 ⊢ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥}) ⊆ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})
10		coss2 5691	. . . 4 ⊢ ((𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥}) ⊆ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}) → (𝐹 ∘ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})) ⊆ (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})))
11	9, 10	ax-mp 5	. . 3 ⊢ (𝐹 ∘ (𝑥 ∈ (◡dom 𝐹 ∪ {∅}) ↦ ∪ ◡{𝑥})) ⊆ (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}))
12	1, 11	eqsstri 3949	. 2 ⊢ tpos 𝐹 ⊆ (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}))
13		relco 6064	. . 3 ⊢ Rel (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}))
14		vex 3444	. . . . 5 ⊢ 𝑦 ∈ V
15		vex 3444	. . . . 5 ⊢ 𝑧 ∈ V
16	14, 15	opelco 5706	. . . 4 ⊢ (⟨𝑦, 𝑧⟩ ∈ (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})) ↔ ∃𝑤(𝑦(𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})𝑤 ∧ 𝑤𝐹𝑧))
17		vex 3444	. . . . . . . . 9 ⊢ 𝑤 ∈ V
18		eleq1 2877	. . . . . . . . . 10 ⊢ (𝑥 = 𝑦 → (𝑥 ∈ ((V × V) ∪ {∅}) ↔ 𝑦 ∈ ((V × V) ∪ {∅})))
19		sneq 4535	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑦 → {𝑥} = {𝑦})
20	19	cnveqd 5710	. . . . . . . . . . . 12 ⊢ (𝑥 = 𝑦 → ◡{𝑥} = ◡{𝑦})
21	20	unieqd 4814	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑦 → ∪ ◡{𝑥} = ∪ ◡{𝑦})
22	21	eqeq2d 2809	. . . . . . . . . 10 ⊢ (𝑥 = 𝑦 → (𝑧 = ∪ ◡{𝑥} ↔ 𝑧 = ∪ ◡{𝑦}))
23	18, 22	anbi12d 633	. . . . . . . . 9 ⊢ (𝑥 = 𝑦 → ((𝑥 ∈ ((V × V) ∪ {∅}) ∧ 𝑧 = ∪ ◡{𝑥}) ↔ (𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑧 = ∪ ◡{𝑦})))
24		eqeq1 2802	. . . . . . . . . 10 ⊢ (𝑧 = 𝑤 → (𝑧 = ∪ ◡{𝑦} ↔ 𝑤 = ∪ ◡{𝑦}))
25	24	anbi2d 631	. . . . . . . . 9 ⊢ (𝑧 = 𝑤 → ((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑧 = ∪ ◡{𝑦}) ↔ (𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦})))
26		df-mpt 5111	. . . . . . . . 9 ⊢ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}) = {⟨𝑥, 𝑧⟩ ∣ (𝑥 ∈ ((V × V) ∪ {∅}) ∧ 𝑧 = ∪ ◡{𝑥})}
27	14, 17, 23, 25, 26	brab 5395	. . . . . . . 8 ⊢ (𝑦(𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})𝑤 ↔ (𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}))
28		simplr 768	. . . . . . . . . . . 12 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → 𝑤 = ∪ ◡{𝑦})
29	17, 15	breldm 5741	. . . . . . . . . . . . 13 ⊢ (𝑤𝐹𝑧 → 𝑤 ∈ dom 𝐹)
30	29	adantl 485	. . . . . . . . . . . 12 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → 𝑤 ∈ dom 𝐹)
31	28, 30	eqeltrrd 2891	. . . . . . . . . . 11 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → ∪ ◡{𝑦} ∈ dom 𝐹)
32		elvv 5590	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ (V × V) ↔ ∃𝑧∃𝑤 𝑦 = ⟨𝑧, 𝑤⟩)
33		opswap 6053	. . . . . . . . . . . . . . . . . 18 ⊢ ∪ ◡{⟨𝑧, 𝑤⟩} = ⟨𝑤, 𝑧⟩
34	33	eleq1i 2880	. . . . . . . . . . . . . . . . 17 ⊢ (∪ ◡{⟨𝑧, 𝑤⟩} ∈ dom 𝐹 ↔ ⟨𝑤, 𝑧⟩ ∈ dom 𝐹)
35	15, 17	opelcnv 5716	. . . . . . . . . . . . . . . . 17 ⊢ (⟨𝑧, 𝑤⟩ ∈ ◡dom 𝐹 ↔ ⟨𝑤, 𝑧⟩ ∈ dom 𝐹)
36	34, 35	bitr4i 281	. . . . . . . . . . . . . . . 16 ⊢ (∪ ◡{⟨𝑧, 𝑤⟩} ∈ dom 𝐹 ↔ ⟨𝑧, 𝑤⟩ ∈ ◡dom 𝐹)
37		sneq 4535	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑦 = ⟨𝑧, 𝑤⟩ → {𝑦} = {⟨𝑧, 𝑤⟩})
38	37	cnveqd 5710	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑦 = ⟨𝑧, 𝑤⟩ → ◡{𝑦} = ◡{⟨𝑧, 𝑤⟩})
39	38	unieqd 4814	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑦 = ⟨𝑧, 𝑤⟩ → ∪ ◡{𝑦} = ∪ ◡{⟨𝑧, 𝑤⟩})
40	39	eleq1d 2874	. . . . . . . . . . . . . . . . 17 ⊢ (𝑦 = ⟨𝑧, 𝑤⟩ → (∪ ◡{𝑦} ∈ dom 𝐹 ↔ ∪ ◡{⟨𝑧, 𝑤⟩} ∈ dom 𝐹))
41		eleq1 2877	. . . . . . . . . . . . . . . . 17 ⊢ (𝑦 = ⟨𝑧, 𝑤⟩ → (𝑦 ∈ ◡dom 𝐹 ↔ ⟨𝑧, 𝑤⟩ ∈ ◡dom 𝐹))
42	40, 41	bibi12d 349	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 = ⟨𝑧, 𝑤⟩ → ((∪ ◡{𝑦} ∈ dom 𝐹 ↔ 𝑦 ∈ ◡dom 𝐹) ↔ (∪ ◡{⟨𝑧, 𝑤⟩} ∈ dom 𝐹 ↔ ⟨𝑧, 𝑤⟩ ∈ ◡dom 𝐹)))
43	36, 42	mpbiri 261	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = ⟨𝑧, 𝑤⟩ → (∪ ◡{𝑦} ∈ dom 𝐹 ↔ 𝑦 ∈ ◡dom 𝐹))
44	43	exlimivv 1933	. . . . . . . . . . . . . 14 ⊢ (∃𝑧∃𝑤 𝑦 = ⟨𝑧, 𝑤⟩ → (∪ ◡{𝑦} ∈ dom 𝐹 ↔ 𝑦 ∈ ◡dom 𝐹))
45	32, 44	sylbi 220	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ (V × V) → (∪ ◡{𝑦} ∈ dom 𝐹 ↔ 𝑦 ∈ ◡dom 𝐹))
46	45	biimpcd 252	. . . . . . . . . . . 12 ⊢ (∪ ◡{𝑦} ∈ dom 𝐹 → (𝑦 ∈ (V × V) → 𝑦 ∈ ◡dom 𝐹))
47		elun1 4103	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ ◡dom 𝐹 → 𝑦 ∈ (◡dom 𝐹 ∪ {∅}))
48	46, 47	syl6 35	. . . . . . . . . . 11 ⊢ (∪ ◡{𝑦} ∈ dom 𝐹 → (𝑦 ∈ (V × V) → 𝑦 ∈ (◡dom 𝐹 ∪ {∅})))
49	31, 48	syl 17	. . . . . . . . . 10 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → (𝑦 ∈ (V × V) → 𝑦 ∈ (◡dom 𝐹 ∪ {∅})))
50		elun2 4104	. . . . . . . . . . 11 ⊢ (𝑦 ∈ {∅} → 𝑦 ∈ (◡dom 𝐹 ∪ {∅}))
51	50	a1i 11	. . . . . . . . . 10 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → (𝑦 ∈ {∅} → 𝑦 ∈ (◡dom 𝐹 ∪ {∅})))
52		simpll 766	. . . . . . . . . . 11 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → 𝑦 ∈ ((V × V) ∪ {∅}))
53		elun 4076	. . . . . . . . . . 11 ⊢ (𝑦 ∈ ((V × V) ∪ {∅}) ↔ (𝑦 ∈ (V × V) ∨ 𝑦 ∈ {∅}))
54	52, 53	sylib 221	. . . . . . . . . 10 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → (𝑦 ∈ (V × V) ∨ 𝑦 ∈ {∅}))
55	49, 51, 54	mpjaod 857	. . . . . . . . 9 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → 𝑦 ∈ (◡dom 𝐹 ∪ {∅}))
56		simpr 488	. . . . . . . . . 10 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → 𝑤𝐹𝑧)
57	28, 56	eqbrtrrd 5054	. . . . . . . . 9 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → ∪ ◡{𝑦}𝐹𝑧)
58	55, 57	jca 515	. . . . . . . 8 ⊢ (((𝑦 ∈ ((V × V) ∪ {∅}) ∧ 𝑤 = ∪ ◡{𝑦}) ∧ 𝑤𝐹𝑧) → (𝑦 ∈ (◡dom 𝐹 ∪ {∅}) ∧ ∪ ◡{𝑦}𝐹𝑧))
59	27, 58	sylanb 584	. . . . . . 7 ⊢ ((𝑦(𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})𝑤 ∧ 𝑤𝐹𝑧) → (𝑦 ∈ (◡dom 𝐹 ∪ {∅}) ∧ ∪ ◡{𝑦}𝐹𝑧))
60		brtpos2 7881	. . . . . . . 8 ⊢ (𝑧 ∈ V → (𝑦tpos 𝐹𝑧 ↔ (𝑦 ∈ (◡dom 𝐹 ∪ {∅}) ∧ ∪ ◡{𝑦}𝐹𝑧)))
61	15, 60	ax-mp 5	. . . . . . 7 ⊢ (𝑦tpos 𝐹𝑧 ↔ (𝑦 ∈ (◡dom 𝐹 ∪ {∅}) ∧ ∪ ◡{𝑦}𝐹𝑧))
62	59, 61	sylibr 237	. . . . . 6 ⊢ ((𝑦(𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})𝑤 ∧ 𝑤𝐹𝑧) → 𝑦tpos 𝐹𝑧)
63		df-br 5031	. . . . . 6 ⊢ (𝑦tpos 𝐹𝑧 ↔ ⟨𝑦, 𝑧⟩ ∈ tpos 𝐹)
64	62, 63	sylib 221	. . . . 5 ⊢ ((𝑦(𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})𝑤 ∧ 𝑤𝐹𝑧) → ⟨𝑦, 𝑧⟩ ∈ tpos 𝐹)
65	64	exlimiv 1931	. . . 4 ⊢ (∃𝑤(𝑦(𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})𝑤 ∧ 𝑤𝐹𝑧) → ⟨𝑦, 𝑧⟩ ∈ tpos 𝐹)
66	16, 65	sylbi 220	. . 3 ⊢ (⟨𝑦, 𝑧⟩ ∈ (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})) → ⟨𝑦, 𝑧⟩ ∈ tpos 𝐹)
67	13, 66	relssi 5624	. 2 ⊢ (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥})) ⊆ tpos 𝐹
68	12, 67	eqssi 3931	1 ⊢ tpos 𝐹 = (𝐹 ∘ (𝑥 ∈ ((V × V) ∪ {∅}) ↦ ∪ ◡{𝑥}))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   ∨ wo 844   = wceq 1538  ∃wex 1781   ∈ wcel 2111  Vcvv 3441   ∪ cun 3879   ⊆ wss 3881  ∅c0 4243  {csn 4525  ⟨cop 4531  ∪ cuni 4800   class class class wbr 5030   ↦ cmpt 5110   × cxp 5517  ^◡ccnv 5518  dom cdm 5519   ↾ cres 5521   ∘ ccom 5523  Rel wrel 5524  tpos ctpos 7874

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 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-rab 3115  df-v 3443  df-sbc 3721  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4801  df-br 5031  df-opab 5093  df-mpt 5111  df-id 5425  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-iota 6283  df-fun 6326  df-fn 6327  df-fv 6332  df-tpos 7875

This theorem is referenced by:  tposco  7906  nftpos  7910  oftpos  21057