Theorem relopabvOLD

Description: Obsolete version of relopab as of 26-Oct-2026. (Contributed by SN, 8-Sep-2024) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	relopabvOLD	$$⊢\mathrm{Rel}\left\{⟨x,y⟩|\phi \right\}$$

Proof

Step	Hyp	Ref	Expression
1		eqid	$$⊢\left\{⟨x,y⟩|\phi \right\}=\left\{⟨x,y⟩|\phi \right\}$$
2	1	relopabiv	$$⊢\mathrm{Rel}\left\{⟨x,y⟩|\phi \right\}$$