Metamath Proof Explorer


Theorem unisym1

Description: A symmetry with A. .

See negsym1 for more information. (Contributed by Anthony Hart, 4-Sep-2011) (Proof shortened by Mario Carneiro, 11-Dec-2016)

Ref Expression
Assertion unisym1 x x x φ

Proof

Step Hyp Ref Expression
1 falim x φ
2 1 sps x x φ
3 2 sps x x x φ