Theorem wl-nfae1

Description: Unlike nfae , this specialized theorem avoids ax-11 . (Contributed by Wolf Lammen, 26-Jun-2019)

	Ref	Expression
Assertion	wl-nfae1	$$⊢Ⅎx\forall yy=x$$

Proof

Step	Hyp	Ref	Expression
1		aecom	$$⊢\forall yy=x\leftrightarrow \forall xx=y$$
2		nfa1	$$⊢Ⅎx\forall xx=y$$
3	1 2	nfxfr	$$⊢Ⅎx\forall yy=x$$