Metamath Proof Explorer


Theorem scottex2OLD

Description: Obsolete version of scottex as of 18-Jul-2026. (Contributed by Rohan Ridenour, 9-Aug-2023) (Proof modification is discouraged.) (New usage is discouraged.)

Ref Expression
Assertion scottex2OLD Scott A V

Proof

Step Hyp Ref Expression
1 df-scott Scott A = x A | y A rank x rank y
2 scottexOLD x A | y A rank x rank y V
3 1 2 eqeltri Scott A V