Theorem eqvrelcl 39196

Description: Elementhood in the field of an equivalence relation. (Contributed by Mario Carneiro, 12-Aug-2015.) (Revised by Peter Mazsa, 2-Jun-2019.)

Hypotheses

Ref	Expression
eqvrelcl.1	⊢ (𝜑 → EqvRel 𝑅)
eqvrelcl.2	⊢ (𝜑 → 𝐴𝑅𝐵)

Assertion

Ref	Expression
eqvrelcl	⊢ (𝜑 → 𝐴 ∈ dom 𝑅)

Proof of Theorem eqvrelcl

Step	Hyp	Ref	Expression
1		eqvrelcl.1	. . 3 ⊢ (𝜑 → EqvRel 𝑅)
2		eqvrelrel 39181	. . 3 ⊢ ( EqvRel 𝑅 → Rel 𝑅)
3	1, 2	syl 17	. 2 ⊢ (𝜑 → Rel 𝑅)
4		eqvrelcl.2	. 2 ⊢ (𝜑 → 𝐴𝑅𝐵)
5		releldm 5921	. 2 ⊢ ((Rel 𝑅 ∧ 𝐴𝑅𝐵) → 𝐴 ∈ dom 𝑅)
6	3, 4, 5	syl2anc 593	1 ⊢ (𝜑 → 𝐴 ∈ dom 𝑅)

Syntax hints:   → wi 4   ∈ wcel 2143   class class class wbr 5101  dom cdm 5648  Rel wrel 5653   EqvRel weqvrel 38700

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1816  ax-4 1830  ax-5 1931  ax-6 1988  ax-7 2029  ax-8 2145  ax-9 2153  ax-ext 2735  ax-sep 5247  ax-pr 5391

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1101  df-tru 1564  df-fal 1574  df-ex 1801  df-sb 2092  df-clab 2742  df-cleq 2755  df-clel 2838  df-ral 3078  df-rex 3088  df-rab 3416  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4482  df-sn 4584  df-pr 4586  df-op 4590  df-br 5102  df-opab 5164  df-id 5543  df-xp 5654  df-rel 5655  df-cnv 5656  df-co 5657  df-dm 5658  df-rn 5659  df-res 5660  df-refrel 39092  df-symrel 39124  df-trrel 39158  df-eqvrel 39169

This theorem is referenced by:  eqvrelthi  39197  erimeq2  39263