Theorem bnj887

Description: /\ -manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011) (New usage is discouraged.)

	Ref	Expression
Hypotheses	bnj887.1	No typesetting found for |- ( ph <-> ph' ) with typecode |-
	bnj887.2	No typesetting found for |- ( ps <-> ps' ) with typecode |-
	bnj887.3	No typesetting found for |- ( ch <-> ch' ) with typecode |-
	bnj887.4	No typesetting found for |- ( th <-> th' ) with typecode |-
Assertion	bnj887	Could not format assertion : No typesetting found for |- ( ( ph /\ ps /\ ch /\ th ) <-> ( ph' /\ ps' /\ ch' /\ th' ) ) with typecode |-

Proof

Step	Hyp	Ref	Expression
1		bnj887.1	Could not format ( ph <-> ph' ) : No typesetting found for |- ( ph <-> ph' ) with typecode |-
2		bnj887.2	Could not format ( ps <-> ps' ) : No typesetting found for |- ( ps <-> ps' ) with typecode |-
3		bnj887.3	Could not format ( ch <-> ch' ) : No typesetting found for |- ( ch <-> ch' ) with typecode |-
4		bnj887.4	Could not format ( th <-> th' ) : No typesetting found for |- ( th <-> th' ) with typecode |-
5	1 2 3	3anbi123i	Could not format ( ( ph /\ ps /\ ch ) <-> ( ph' /\ ps' /\ ch' ) ) : No typesetting found for |- ( ( ph /\ ps /\ ch ) <-> ( ph' /\ ps' /\ ch' ) ) with typecode |-
6	5 4	anbi12i	Could not format ( ( ( ph /\ ps /\ ch ) /\ th ) <-> ( ( ph' /\ ps' /\ ch' ) /\ th' ) ) : No typesetting found for |- ( ( ( ph /\ ps /\ ch ) /\ th ) <-> ( ( ph' /\ ps' /\ ch' ) /\ th' ) ) with typecode |-
7		df-bnj17	$$⊢\left(\phi \wedge \psi \wedge \chi \wedge \theta \right)\leftrightarrow \left(\left(\phi \wedge \psi \wedge \chi \right)\wedge \theta \right)$$
8		df-bnj17	Could not format ( ( ph' /\ ps' /\ ch' /\ th' ) <-> ( ( ph' /\ ps' /\ ch' ) /\ th' ) ) : No typesetting found for |- ( ( ph' /\ ps' /\ ch' /\ th' ) <-> ( ( ph' /\ ps' /\ ch' ) /\ th' ) ) with typecode |-
9	6 7 8	3bitr4i	Could not format ( ( ph /\ ps /\ ch /\ th ) <-> ( ph' /\ ps' /\ ch' /\ th' ) ) : No typesetting found for |- ( ( ph /\ ps /\ ch /\ th ) <-> ( ph' /\ ps' /\ ch' /\ th' ) ) with typecode |-