date created date updated 2022-03-31 10:33 2022-04-18 11:56 Notation Indicator Function $1[x] = 1$ if $x$ is true $1[x] = 0$ if $x$ is false Vector Dot-Product $a \cdot b = \sum_{j=1}^{m}{a_jb_j}$ Decision Trees ![[decision-tree-notation.png]]