A relational symbol representing perpendicularity between geometric objects or statistical independence between variables.
Examples
Perpendicular lines in geometry
\text{Line } l_1 \perp \text{Line } l_2
Perpendicular vectors
\vec{u} \perp \vec{v} \iff \vec{u} \cdot \vec{v} = 0
Independent events in probability
\text{If events A and B are independent, then } A \perp B