Theorem exse2 7963

Description: Any set relation is set-like. (Contributed by Mario Carneiro, 22-Jun-2015.)

Assertion

Ref	Expression
exse2	⊢ (𝑅 ∈ 𝑉 → 𝑅 Se 𝐴)

Proof of Theorem exse2

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-rab 3417	. . . . 5 ⊢ {𝑦 ∈ 𝐴 ∣ 𝑦𝑅𝑥} = {𝑦 ∣ (𝑦 ∈ 𝐴 ∧ 𝑦𝑅𝑥)}
2		vex 3458	. . . . . . . 8 ⊢ 𝑦 ∈ V
3		vex 3458	. . . . . . . 8 ⊢ 𝑥 ∈ V
4	2, 3	breldm 5902	. . . . . . 7 ⊢ (𝑦𝑅𝑥 → 𝑦 ∈ dom 𝑅)
5	4	adantl 487	. . . . . 6 ⊢ ((𝑦 ∈ 𝐴 ∧ 𝑦𝑅𝑥) → 𝑦 ∈ dom 𝑅)
6	5	abssi 3996	. . . . 5 ⊢ {𝑦 ∣ (𝑦 ∈ 𝐴 ∧ 𝑦𝑅𝑥)} ⊆ dom 𝑅
7	1, 6	eqsstri 3959	. . . 4 ⊢ {𝑦 ∈ 𝐴 ∣ 𝑦𝑅𝑥} ⊆ dom 𝑅
8		dmexg 7947	. . . 4 ⊢ (𝑅 ∈ 𝑉 → dom 𝑅 ∈ V)
9		ssexg 5288	. . . 4 ⊢ (({𝑦 ∈ 𝐴 ∣ 𝑦𝑅𝑥} ⊆ dom 𝑅 ∧ dom 𝑅 ∈ V) → {𝑦 ∈ 𝐴 ∣ 𝑦𝑅𝑥} ∈ V)
10	7, 8, 9	sylancr 599	. . 3 ⊢ (𝑅 ∈ 𝑉 → {𝑦 ∈ 𝐴 ∣ 𝑦𝑅𝑥} ∈ V)
11	10	ralrimivw 3162	. 2 ⊢ (𝑅 ∈ 𝑉 → ∀𝑥 ∈ 𝐴 {𝑦 ∈ 𝐴 ∣ 𝑦𝑅𝑥} ∈ V)
12		df-se 5612	. 2 ⊢ (𝑅 Se 𝐴 ↔ ∀𝑥 ∈ 𝐴 {𝑦 ∈ 𝐴 ∣ 𝑦𝑅𝑥} ∈ V)
13	11, 12	sylibr 237	1 ⊢ (𝑅 ∈ 𝑉 → 𝑅 Se 𝐴)

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∈ wcel 2147  {cab 2741  ∀wral 3080  {crab 3416  Vcvv 3454   ⊆ wss 3900   class class class wbr 5108   Se wse 5609  dom cdm 5658

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 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735  ax-sep 5255  ax-pr 5398  ax-un 7783

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 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ral 3081  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-br 5109  df-opab 5174  df-se 5612  df-cnv 5666  df-dm 5668  df-rn 5669

This theorem is used by:  dfac8clem  10150