A centered dot operator representing multiplication, inner products, or composition of functions in algebra and analysis.
Examples
Multiplication in algebraic expressions
a \sdot b \sdot c = abc
Vector dot product notation
\vec{u} \sdot \vec{v} = u_1v_1 + u_2v_2 + u_3v_3
Group operation notation
g_1 \sdot g_2 \sdot g_3 \in G