👉 "Tredecile" is a term used in mathematics and statistics to describe a class of random variables. These variables are defined by the equation: \[ X = \begin{cases} x_1 + 0.3x_2 & \text{if } x_1 > 0 \\ x_1 - 0.3x_2 & \text{if } x_1 < 0 \end{cases}\] In other words, the