\blacktriangleThe \blacktriangle symbol is a filled triangle pointing upwards, often used in mathematical contexts to denote specific operations or relations, such as indicating a change or a specific type of product.
Indicating a specific operation or relation between A and B
A \blacktriangle BDefining a set or region, such as a triangle in coordinate space
\blacktriangle = \{ x \in \mathbb{R}^2 : x_1 + x_2 \leq 1, x_1 \geq 0, x_2 \geq 0 \}Conditional statement involving elements within a defined triangular region
\text{If } x \in \blacktriangle, \text{ then } f(x) = 0