Theorem bj-imdiridlem 37937

Description: Lemma for bj-imdirid 37938 and bj-iminvid 37947. (Contributed by BJ, 26-May-2024.)

Hypothesis

Ref	Expression
bj-imdiridlem.1	⊢ ((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) → (𝜑 ↔ 𝑥 = 𝑦))

Assertion

Ref	Expression
bj-imdiridlem	⊢ {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) ∧ 𝜑)} = ( I ↾ 𝒫 𝐴)

Distinct variable group:   𝑥,𝐴,𝑦

Allowed substitution hints:   𝜑(𝑥, 𝑦)

Proof of Theorem bj-imdiridlem

Step	Hyp	Ref	Expression
1		bj-imdiridlem.1	. . . . . . . 8 ⊢ ((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) → (𝜑 ↔ 𝑥 = 𝑦))
2	1	biimp3a 1498	. . . . . . 7 ⊢ ((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴 ∧ 𝜑) → 𝑥 = 𝑦)
3	2	3expib 1140	. . . . . 6 ⊢ (𝑥 ⊆ 𝐴 → ((𝑦 ⊆ 𝐴 ∧ 𝜑) → 𝑥 = 𝑦))
4		equcomi 2050	. . . . . . . . . 10 ⊢ (𝑥 = 𝑦 → 𝑦 = 𝑥)
5	4	sseq1d 3962	. . . . . . . . 9 ⊢ (𝑥 = 𝑦 → (𝑦 ⊆ 𝐴 ↔ 𝑥 ⊆ 𝐴))
6	5	biimparc 485	. . . . . . . 8 ⊢ ((𝑥 ⊆ 𝐴 ∧ 𝑥 = 𝑦) → 𝑦 ⊆ 𝐴)
7		simpr 490	. . . . . . . . 9 ⊢ (((𝑥 ⊆ 𝐴 ∧ 𝑥 = 𝑦) ∧ 𝑦 ⊆ 𝐴) → 𝑦 ⊆ 𝐴)
8	1	biimpar 483	. . . . . . . . . 10 ⊢ (((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) ∧ 𝑥 = 𝑦) → 𝜑)
9	8	an32s 665	. . . . . . . . 9 ⊢ (((𝑥 ⊆ 𝐴 ∧ 𝑥 = 𝑦) ∧ 𝑦 ⊆ 𝐴) → 𝜑)
10	7, 9	jca 521	. . . . . . . 8 ⊢ (((𝑥 ⊆ 𝐴 ∧ 𝑥 = 𝑦) ∧ 𝑦 ⊆ 𝐴) → (𝑦 ⊆ 𝐴 ∧ 𝜑))
11	6, 10	mpdan 700	. . . . . . 7 ⊢ ((𝑥 ⊆ 𝐴 ∧ 𝑥 = 𝑦) → (𝑦 ⊆ 𝐴 ∧ 𝜑))
12	11	ex 418	. . . . . 6 ⊢ (𝑥 ⊆ 𝐴 → (𝑥 = 𝑦 → (𝑦 ⊆ 𝐴 ∧ 𝜑)))
13	3, 12	impbid 215	. . . . 5 ⊢ (𝑥 ⊆ 𝐴 → ((𝑦 ⊆ 𝐴 ∧ 𝜑) ↔ 𝑥 = 𝑦))
14	13	pm5.32i 585	. . . 4 ⊢ ((𝑥 ⊆ 𝐴 ∧ (𝑦 ⊆ 𝐴 ∧ 𝜑)) ↔ (𝑥 ⊆ 𝐴 ∧ 𝑥 = 𝑦))
15		anass 474	. . . 4 ⊢ (((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) ∧ 𝜑) ↔ (𝑥 ⊆ 𝐴 ∧ (𝑦 ⊆ 𝐴 ∧ 𝜑)))
16		velpw 4562	. . . . 5 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴)
17		vex 3454	. . . . . 6 ⊢ 𝑦 ∈ V
18	17	ideq 5832	. . . . 5 ⊢ (𝑥 I 𝑦 ↔ 𝑥 = 𝑦)
19	16, 18	anbi12i 640	. . . 4 ⊢ ((𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 I 𝑦) ↔ (𝑥 ⊆ 𝐴 ∧ 𝑥 = 𝑦))
20	14, 15, 19	3bitr4i 306	. . 3 ⊢ (((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) ∧ 𝜑) ↔ (𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 I 𝑦))
21	20	opabbii 5172	. 2 ⊢ {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) ∧ 𝜑)} = {⟨𝑥, 𝑦⟩ ∣ (𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 I 𝑦)}
22		dfres2 6037	. 2 ⊢ ( I ↾ 𝒫 𝐴) = {⟨𝑥, 𝑦⟩ ∣ (𝑥 ∈ 𝒫 𝐴 ∧ 𝑥 I 𝑦)}
23	21, 22	eqtr4i 2786	1 ⊢ {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ⊆ 𝐴 ∧ 𝑦 ⊆ 𝐴) ∧ 𝜑)} = ( I ↾ 𝒫 𝐴)

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   = wceq 1570   ∈ wcel 2145   ⊆ wss 3899  𝒫 cpw 4557   class class class wbr 5103  {copab 5167   I cid 5549   ↾ cres 5657

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2732  ax-sep 5251  ax-pr 5398

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-br 5104  df-opab 5168  df-id 5550  df-xp 5661  df-rel 5662  df-res 5667

This theorem is used by:  bj-imdirid  37938  bj-iminvid  37947