Definition df-gonot

Description: Define the Godel-set of negation. Here the argument U is also a Godel-set corresponding to smaller formulas. Note that this is aclass expression, not a wff. (Contributed by Mario Carneiro, 14-Jul-2013)

	Ref	Expression
Assertion	df-gonot	|- -.g U = ( U |g U )

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		cU	|- U
1	0	cgon	|- -.g U
2		cgna	|- |g
3	0 0 2	co	|- ( U |g U )
4	1 3	wceq	|- -.g U = ( U |g U )