Theorem asymref2 6117

Description: Two ways of saying a relation is antisymmetric and reflexive. (Contributed by NM, 6-May-2008.) (Proof shortened by Mario Carneiro, 4-Dec-2016.)

Assertion

Ref	Expression
asymref2	⊢ ((𝑅 ∩ ◡𝑅) = ( I ↾ ∪ ∪ 𝑅) ↔ (∀𝑥 ∈ ∪ ∪ 𝑅𝑥𝑅𝑥 ∧ ∀𝑥∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)))

Distinct variable group:   𝑥,𝑦,𝑅

Proof of Theorem asymref2

Step	Hyp	Ref	Expression
1		asymref 6116	. 2 ⊢ ((𝑅 ∩ ◡𝑅) = ( I ↾ ∪ ∪ 𝑅) ↔ ∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) ↔ 𝑥 = 𝑦))
2		albiim 1917	. . 3 ⊢ (∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) ↔ 𝑥 = 𝑦) ↔ (∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ∧ ∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥))))
3	2	ralbii 3109	. 2 ⊢ (∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) ↔ 𝑥 = 𝑦) ↔ ∀𝑥 ∈ ∪ ∪ 𝑅(∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ∧ ∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥))))
4		r19.26 3123	. . 3 ⊢ (∀𝑥 ∈ ∪ ∪ 𝑅(∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ∧ ∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥))) ↔ (∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ∧ ∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥))))
5		ancom 465	. . 3 ⊢ ((∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ∧ ∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥))) ↔ (∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)) ∧ ∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)))
6		equcom 2046	. . . . . . . 8 ⊢ (𝑥 = 𝑦 ↔ 𝑦 = 𝑥)
7	6	imbi1i 352	. . . . . . 7 ⊢ ((𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)) ↔ (𝑦 = 𝑥 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)))
8	7	albii 1847	. . . . . 6 ⊢ (∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)) ↔ ∀𝑦(𝑦 = 𝑥 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)))
9		breq2 5112	. . . . . . . . 9 ⊢ (𝑦 = 𝑥 → (𝑥𝑅𝑦 ↔ 𝑥𝑅𝑥))
10		breq1 5111	. . . . . . . . 9 ⊢ (𝑦 = 𝑥 → (𝑦𝑅𝑥 ↔ 𝑥𝑅𝑥))
11	9, 10	anbi12d 643	. . . . . . . 8 ⊢ (𝑦 = 𝑥 → ((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) ↔ (𝑥𝑅𝑥 ∧ 𝑥𝑅𝑥)))
12		anidm 574	. . . . . . . 8 ⊢ ((𝑥𝑅𝑥 ∧ 𝑥𝑅𝑥) ↔ 𝑥𝑅𝑥)
13	11, 12	bitrdi 290	. . . . . . 7 ⊢ (𝑦 = 𝑥 → ((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) ↔ 𝑥𝑅𝑥))
14	13	equsalvw 2032	. . . . . 6 ⊢ (∀𝑦(𝑦 = 𝑥 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)) ↔ 𝑥𝑅𝑥)
15	8, 14	bitri 278	. . . . 5 ⊢ (∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)) ↔ 𝑥𝑅𝑥)
16	15	ralbii 3109	. . . 4 ⊢ (∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)) ↔ ∀𝑥 ∈ ∪ ∪ 𝑅𝑥𝑅𝑥)
17		df-ral 3078	. . . . 5 ⊢ (∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ↔ ∀𝑥(𝑥 ∈ ∪ ∪ 𝑅 → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)))
18		df-br 5109	. . . . . . . . . . . . 13 ⊢ (𝑥𝑅𝑦 ↔ ⟨𝑥, 𝑦⟩ ∈ 𝑅)
19		vex 3457	. . . . . . . . . . . . . . 15 ⊢ 𝑥 ∈ V
20		vex 3457	. . . . . . . . . . . . . . 15 ⊢ 𝑦 ∈ V
21	19, 20	opeluu 5452	. . . . . . . . . . . . . 14 ⊢ (⟨𝑥, 𝑦⟩ ∈ 𝑅 → (𝑥 ∈ ∪ ∪ 𝑅 ∧ 𝑦 ∈ ∪ ∪ 𝑅))
22	21	simpld 499	. . . . . . . . . . . . 13 ⊢ (⟨𝑥, 𝑦⟩ ∈ 𝑅 → 𝑥 ∈ ∪ ∪ 𝑅)
23	18, 22	sylbi 220	. . . . . . . . . . . 12 ⊢ (𝑥𝑅𝑦 → 𝑥 ∈ ∪ ∪ 𝑅)
24	23	adantr 485	. . . . . . . . . . 11 ⊢ ((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 ∈ ∪ ∪ 𝑅)
25	24	pm2.24d 152	. . . . . . . . . 10 ⊢ ((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → (¬ 𝑥 ∈ ∪ ∪ 𝑅 → 𝑥 = 𝑦))
26	25	com12 33	. . . . . . . . 9 ⊢ (¬ 𝑥 ∈ ∪ ∪ 𝑅 → ((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦))
27	26	alrimiv 1955	. . . . . . . 8 ⊢ (¬ 𝑥 ∈ ∪ ∪ 𝑅 → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦))
28		id 23	. . . . . . . 8 ⊢ (∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦))
29	27, 28	ja 188	. . . . . . 7 ⊢ ((𝑥 ∈ ∪ ∪ 𝑅 → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)) → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦))
30		ax-1 6	. . . . . . 7 ⊢ (∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) → (𝑥 ∈ ∪ ∪ 𝑅 → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)))
31	29, 30	impbii 212	. . . . . 6 ⊢ ((𝑥 ∈ ∪ ∪ 𝑅 → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)) ↔ ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦))
32	31	albii 1847	. . . . 5 ⊢ (∀𝑥(𝑥 ∈ ∪ ∪ 𝑅 → ∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)) ↔ ∀𝑥∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦))
33	17, 32	bitri 278	. . . 4 ⊢ (∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ↔ ∀𝑥∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦))
34	16, 33	anbi12i 639	. . 3 ⊢ ((∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥)) ∧ ∀𝑥 ∈ ∪ ∪ 𝑅∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)) ↔ (∀𝑥 ∈ ∪ ∪ 𝑅𝑥𝑅𝑥 ∧ ∀𝑥∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)))
35	4, 5, 34	3bitri 300	. 2 ⊢ (∀𝑥 ∈ ∪ ∪ 𝑅(∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦) ∧ ∀𝑦(𝑥 = 𝑦 → (𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥))) ↔ (∀𝑥 ∈ ∪ ∪ 𝑅𝑥𝑅𝑥 ∧ ∀𝑥∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)))
36	1, 3, 35	3bitri 300	1 ⊢ ((𝑅 ∩ ◡𝑅) = ( I ↾ ∪ ∪ 𝑅) ↔ (∀𝑥 ∈ ∪ ∪ 𝑅𝑥𝑅𝑥 ∧ ∀𝑥∀𝑦((𝑥𝑅𝑦 ∧ 𝑦𝑅𝑥) → 𝑥 = 𝑦)))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 400  ∀wal 1566   = wceq 1568   ∈ wcel 2141  ∀wral 3077   ∩ cin 3903  ⟨cop 4594  ∪ cuni 4871   class class class wbr 5108   I cid 5555  ^◡ccnv 5660   ↾ cres 5663

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-ext 2733  ax-sep 5256  ax-pr 5404

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-sb 2095  df-clab 2740  df-cleq 2753  df-clel 2836  df-ral 3078  df-rex 3088  df-rab 3415  df-v 3455  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-sn 4589  df-pr 4591  df-op 4595  df-uni 4872  df-br 5109  df-opab 5173  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-res 5673

This theorem is referenced by:  pslem  18627  psss  18635