Theorem fpwwe2lem3 10389

Description: Lemma for fpwwe2 10399. (Contributed by Mario Carneiro, 19-May-2015.) (Revised by AV, 20-Jul-2024.)

Hypotheses

Ref	Expression
fpwwe2.1	⊢ 𝑊 = {⟨𝑥, 𝑟⟩ ∣ ((𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ (𝑥 × 𝑥)) ∧ (𝑟 We 𝑥 ∧ ∀𝑦 ∈ 𝑥 [(◡𝑟 “ {𝑦}) / 𝑢](𝑢𝐹(𝑟 ∩ (𝑢 × 𝑢))) = 𝑦))}
fpwwe2.2	⊢ (𝜑 → 𝐴 ∈ 𝑉)
fpwwe2lem3.4	⊢ (𝜑 → 𝑋𝑊𝑅)

Assertion

Ref	Expression
fpwwe2lem3	⊢ ((𝜑 ∧ 𝐵 ∈ 𝑋) → ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵)

Distinct variable groups:   𝑦,𝑢,𝐵   𝑢,𝑟,𝑥,𝑦,𝐹   𝑋,𝑟,𝑢,𝑥,𝑦   𝜑,𝑟,𝑢,𝑥,𝑦   𝐴,𝑟,𝑥   𝑅,𝑟,𝑢,𝑥,𝑦   𝑊,𝑟,𝑢,𝑥,𝑦

Allowed substitution hints:   𝐴(𝑦,𝑢)   𝐵(𝑥,𝑟)   𝑉(𝑥,𝑦,𝑢,𝑟)

Proof of Theorem fpwwe2lem3

Step	Hyp	Ref	Expression
1		fpwwe2lem3.4	. . . . 5 ⊢ (𝜑 → 𝑋𝑊𝑅)
2		fpwwe2.1	. . . . . 6 ⊢ 𝑊 = {⟨𝑥, 𝑟⟩ ∣ ((𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ (𝑥 × 𝑥)) ∧ (𝑟 We 𝑥 ∧ ∀𝑦 ∈ 𝑥 [(◡𝑟 “ {𝑦}) / 𝑢](𝑢𝐹(𝑟 ∩ (𝑢 × 𝑢))) = 𝑦))}
3		fpwwe2.2	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
4	2, 3	fpwwe2lem2 10388	. . . . 5 ⊢ (𝜑 → (𝑋𝑊𝑅 ↔ ((𝑋 ⊆ 𝐴 ∧ 𝑅 ⊆ (𝑋 × 𝑋)) ∧ (𝑅 We 𝑋 ∧ ∀𝑦 ∈ 𝑋 [(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦))))
5	1, 4	mpbid 231	. . . 4 ⊢ (𝜑 → ((𝑋 ⊆ 𝐴 ∧ 𝑅 ⊆ (𝑋 × 𝑋)) ∧ (𝑅 We 𝑋 ∧ ∀𝑦 ∈ 𝑋 [(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦)))
6	5	simprrd 771	. . 3 ⊢ (𝜑 → ∀𝑦 ∈ 𝑋 [(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦)
7		sneq 4571	. . . . . 6 ⊢ (𝑦 = 𝐵 → {𝑦} = {𝐵})
8	7	imaeq2d 5969	. . . . 5 ⊢ (𝑦 = 𝐵 → (◡𝑅 “ {𝑦}) = (◡𝑅 “ {𝐵}))
9		eqeq2 2750	. . . . 5 ⊢ (𝑦 = 𝐵 → ((𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦 ↔ (𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵))
10	8, 9	sbceqbid 3723	. . . 4 ⊢ (𝑦 = 𝐵 → ([(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦 ↔ [(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵))
11	10	rspccva 3560	. . 3 ⊢ ((∀𝑦 ∈ 𝑋 [(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦 ∧ 𝐵 ∈ 𝑋) → [(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵)
12	6, 11	sylan 580	. 2 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑋) → [(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵)
13		cnvimass 5989	. . . . 5 ⊢ (◡𝑅 “ {𝐵}) ⊆ dom 𝑅
14	2	relopabiv 5730	. . . . . . 7 ⊢ Rel 𝑊
15	14	brrelex2i 5644	. . . . . 6 ⊢ (𝑋𝑊𝑅 → 𝑅 ∈ V)
16		dmexg 7750	. . . . . 6 ⊢ (𝑅 ∈ V → dom 𝑅 ∈ V)
17	1, 15, 16	3syl 18	. . . . 5 ⊢ (𝜑 → dom 𝑅 ∈ V)
18		ssexg 5247	. . . . 5 ⊢ (((◡𝑅 “ {𝐵}) ⊆ dom 𝑅 ∧ dom 𝑅 ∈ V) → (◡𝑅 “ {𝐵}) ∈ V)
19	13, 17, 18	sylancr 587	. . . 4 ⊢ (𝜑 → (◡𝑅 “ {𝐵}) ∈ V)
20		id 22	. . . . . . 7 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → 𝑢 = (◡𝑅 “ {𝐵}))
21	20	sqxpeqd 5621	. . . . . . . 8 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → (𝑢 × 𝑢) = ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))
22	21	ineq2d 4146	. . . . . . 7 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → (𝑅 ∩ (𝑢 × 𝑢)) = (𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵}))))
23	20, 22	oveq12d 7293	. . . . . 6 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → (𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))))
24	23	eqeq1d 2740	. . . . 5 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → ((𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵 ↔ ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵))
25	24	sbcieg 3756	. . . 4 ⊢ ((◡𝑅 “ {𝐵}) ∈ V → ([(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵 ↔ ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵))
26	19, 25	syl 17	. . 3 ⊢ (𝜑 → ([(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵 ↔ ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵))
27	26	adantr 481	. 2 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑋) → ([(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵 ↔ ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵))
28	12, 27	mpbid 231	1 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑋) → ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵)

Syntax hints:   → wi 4   ↔ wb 205   ∧ wa 396   = wceq 1539   ∈ wcel 2106  ∀wral 3064  Vcvv 3432  [wsbc 3716   ∩ cin 3886   ⊆ wss 3887  {csn 4561   class class class wbr 5074  {copab 5136   We wwe 5543   × cxp 5587  ^◡ccnv 5588  dom cdm 5589   “ cima 5592  (class class class)co 7275

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-ral 3069  df-rex 3070  df-rab 3073  df-v 3434  df-sbc 3717  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-br 5075  df-opab 5137  df-po 5503  df-so 5504  df-fr 5544  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-iota 6391  df-fv 6441  df-ov 7278

This theorem is referenced by:  fpwwe2lem7  10393  fpwwe2lem11  10397  fpwwe2lem12  10398  fpwwe2  10399  canthwelem  10406  pwfseqlem4  10418