Theorem bj-fast 13776

Description: A refutable formula is stable. (Contributed by BJ, 24-Nov-2023.)

Assertion

Ref	Expression
bj-fast	|- ( -. ph -> STAB ph )

Proof of Theorem bj-fast

Step	Hyp	Ref	Expression
1		pm2.24 616	. 2 |- ( -. ph -> ( -. -. ph -> ph ) )
2		df-stab 826	. 2 |- (STAB ph <-> ( -. -. ph -> ph ) )
3	1, 2	sylibr 133	1 |- ( -. ph -> STAB ph )

Syntax hints:   -. wn 3   -> wi 4  STAB wstab 825

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in2 610

This theorem depends on definitions:  df-bi 116  df-stab 826

This theorem is referenced by:  bj-stfal  13777  bj-nnst  13778  bj-dcstab  13791