Theorem relwdom

Description: Weak dominance is a relation. (Contributed by Stefan O'Rear, 11-Feb-2015)

	Ref	Expression
Assertion	relwdom	⊢ Rel ≼*

Proof

Step	Hyp	Ref	Expression
1		df-wdom	⊢ ≼* = { ⟨ 𝑥 , 𝑦 ⟩ ∣ ( 𝑥 = ∅ ∨ ∃ 𝑧 𝑧 : 𝑦 –onto→ 𝑥 ) }
2	1	relopabiv	⊢ Rel ≼*