ELI5: Explain Like I'm 5

Quadratic classifier

A quadratic classifier is a type of machine learning tool that uses mathematics to identify things. It works by looking for patterns in data that it can use to decide which “group” a particular set of data points belong to. For example, a quadratic classifier might look through pictures of cats and dogs and look for patterns in color, shape, and size that help it decide whether a particular picture contains a cat or a dog.