Theorem nfnae 1736

Description: All variables are effectively bound in a distinct variable specifier. (Contributed by Mario Carneiro, 11-Aug-2016.)

Assertion

Ref	Expression
nfnae	|- F/ z -. A. x x = y

Proof of Theorem nfnae

Step	Hyp	Ref	Expression
1		nfae 1733	. 2 |- F/ z A. x x = y
2	1	nfn 1672	1 |- F/ z -. A. x x = y

Syntax hints:   -. wn 3   A.wal 1362   F/wnf 1474

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548

This theorem depends on definitions:  df-bi 117  df-tru 1367  df-fal 1370  df-nf 1475

This theorem is referenced by:  sbequ6  1797  dvelimfv  2030  nfsb4t  2033