\bigcircThe \bigcirc operator is used to denote a large circle, often used in mathematical expressions to represent operations like the symmetric difference of sets or other binary operations that can be visualized as a circle.
Symmetric difference of sets A and B
A \bigcirc BA binary operation represented by a large circle between x and y
x \bigcirc yAn operation on x with a constant using the big circle operator
f(x) = x \bigcirc 2