Metamath Proof Explorer


Theorem nfra2wOLDOLD

Description: Obsolete version of nfra2w as of 24-Sep-2024. (Contributed by Alan Sare, 31-Dec-2011) (Revised by Gino Giotto, 10-Jan-2024) (Proof modification is discouraged.) (New usage is discouraged.)

Ref Expression
Assertion nfra2wOLDOLD yxAyBφ

Proof

Step Hyp Ref Expression
1 nfcv _yA
2 nfra1 yyBφ
3 1 2 nfralw yxAyBφ