\odot
The \odot symbol represents the circled dot operator, which is used in various mathematical contexts such as vector multiplication, composition of functions, or other specialized operations depending on the field of study.
General use of the circled dot operator in an equation.
a \odot b = c
Vector multiplication using the circled dot operator.
\vec{A} \odot \vec{B}
Function composition using the circled dot operator.
f \odot g(x) = f(g(x))