Theorem fpwwe2lem3 10591

Description: Lemma for fpwwe2 10601. (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 10590	. . . . 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 234	. . . 4 ⊢ (𝜑 → ((𝑋 ⊆ 𝐴 ∧ 𝑅 ⊆ (𝑋 × 𝑋)) ∧ (𝑅 We 𝑋 ∧ ∀𝑦 ∈ 𝑋 [(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦)))
6	5	simprrd 783	. . 3 ⊢ (𝜑 → ∀𝑦 ∈ 𝑋 [(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦)
7		sneq 4592	. . . . . 6 ⊢ (𝑦 = 𝐵 → {𝑦} = {𝐵})
8	7	imaeq2d 6049	. . . . 5 ⊢ (𝑦 = 𝐵 → (◡𝑅 “ {𝑦}) = (◡𝑅 “ {𝐵}))
9		eqeq2 2774	. . . . 5 ⊢ (𝑦 = 𝐵 → ((𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦 ↔ (𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵))
10	8, 9	sbceqbid 3751	. . . 4 ⊢ (𝑦 = 𝐵 → ([(◡𝑅 “ {𝑦}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝑦 ↔ [(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵))
11	10	rspccva 3580	. . 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 589	. 2 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑋) → [(◡𝑅 “ {𝐵}) / 𝑢](𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵)
13		cnvimass 6071	. . . . 5 ⊢ (◡𝑅 “ {𝐵}) ⊆ dom 𝑅
14	2	relopabiv 5793	. . . . . . 7 ⊢ Rel 𝑊
15	14	brrelex2i 5704	. . . . . 6 ⊢ (𝑋𝑊𝑅 → 𝑅 ∈ V)
16		dmexg 7882	. . . . . 6 ⊢ (𝑅 ∈ V → dom 𝑅 ∈ V)
17	1, 15, 16	3syl 18	. . . . 5 ⊢ (𝜑 → dom 𝑅 ∈ V)
18		ssexg 5279	. . . . 5 ⊢ (((◡𝑅 “ {𝐵}) ⊆ dom 𝑅 ∧ dom 𝑅 ∈ V) → (◡𝑅 “ {𝐵}) ∈ V)
19	13, 17, 18	sylancr 596	. . . 4 ⊢ (𝜑 → (◡𝑅 “ {𝐵}) ∈ V)
20		id 22	. . . . . . 7 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → 𝑢 = (◡𝑅 “ {𝐵}))
21	20	sqxpeqd 5679	. . . . . . . 8 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → (𝑢 × 𝑢) = ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))
22	21	ineq2d 4172	. . . . . . 7 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → (𝑅 ∩ (𝑢 × 𝑢)) = (𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵}))))
23	20, 22	oveq12d 7414	. . . . . 6 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → (𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))))
24	23	eqeq1d 2764	. . . . 5 ⊢ (𝑢 = (◡𝑅 “ {𝐵}) → ((𝑢𝐹(𝑅 ∩ (𝑢 × 𝑢))) = 𝐵 ↔ ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵))
25	24	sbcieg 3783	. . . 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 484	. 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 234	1 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑋) → ((◡𝑅 “ {𝐵})𝐹(𝑅 ∩ ((◡𝑅 “ {𝐵}) × (◡𝑅 “ {𝐵})))) = 𝐵)

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 399   = wceq 1560   ∈ wcel 2142  ∀wral 3076  Vcvv 3454  [wsbc 3744   ∩ cin 3903   ⊆ wss 3904  {csn 4582   class class class wbr 5100  {copab 5162   We wwe 5599   × cxp 5645  ^◡ccnv 5646  dom cdm 5647   “ cima 5650  (class class class)co 7396

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-ext 2734  ax-sep 5246  ax-pow 5322  ax-pr 5390  ax-un 7718

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3or 1099  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-sb 2091  df-clab 2741  df-cleq 2754  df-clel 2837  df-ral 3077  df-rex 3087  df-rab 3415  df-v 3456  df-sbc 3745  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-pw 4557  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-po 5555  df-so 5556  df-fr 5600  df-we 5602  df-xp 5653  df-rel 5654  df-cnv 5655  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-iota 6477  df-fv 6529  df-ov 7399

This theorem is referenced by:  fpwwe2lem7  10595  fpwwe2lem11  10599  fpwwe2lem12  10600  fpwwe2  10601  canthwelem  10608  pwfseqlem4  10620