\smallsmile
The \smallsmile symbol is used to denote a relation or operation that resembles a small smile shape. It is often used in mathematics to represent a specific type of relation or operation, depending on the context.
Indicates a specific relation between elements A and B.
A \smallsmile B
Represents a relation or operation between variables x and y.
x \smallsmile y
Denotes a relation between propositions P and Q.
P \smallsmile Q