Symbols:Greek/Delta

Diagonal Relation

 * $\Delta_S$

Product of Differences

 * $\Delta_n \left({x_1, x_2, \ldots, x_n}\right)$

Kronecker Delta

 * $\delta_{x y}$

Change

 * $\Delta x_n$

$\Delta$ is often used to mean change or difference.

For example, for the definition of slope:


 * $\dfrac {\Delta y}{\Delta x} = \dfrac {y_2-y_1}{x_2-x_1} = \dfrac {\text{change in } y}{\text{change in } x}$