Definition df-nnu 245

Description: Definition of the dual creation operator.

Assertion

Ref	Expression
df-nnu	⊦ (∇x𝜑 ⧟ ~ νx~ 𝜑)

Detailed syntax breakdown of Definition df-nnu

Step	Hyp	Ref	Expression
1		wph	. . 3 wff 𝜑
2		vx	. . 3 var x
3	1, 2	wnnu 242	. 2 wff ∇x𝜑
4	1	wneg 3	. . . 4 wff ~ 𝜑
5	4, 2	wnu 206	. . 3 wff νx~ 𝜑
6	5	wneg 3	. 2 wff ~ νx~ 𝜑
7	3, 6	wlb 55	1 wff (∇x𝜑 ⧟ ~ νx~ 𝜑)

This definition is referenced by: (None)