Theorem amosym1

Description: A symmetry with E* .

See negsym1 for more information. (Contributed by Anthony Hart, 13-Sep-2011)

	Ref	Expression
Assertion	amosym1	|- ( E* x E* x F. -> E* x ph )

Proof

Step	Hyp	Ref	Expression
1		mofal	|- E* x F.
2	1	a1i	|- ( ph -> E* x F. )
3	2	moimi	|- ( E* x E* x F. -> E* x ph )