There are many flavours of regression, each with their own assumptions, loss functions and strengths. This directory contains depth studies of each of the following flavours, including derivations and approximate / closed-form implementations.
"By relieving the brain of all unnecessary work, a good notation sets it free to concentrate on more advanced problems, and in effect increases the mental power of the race."—Alfred North Whitehead
"Mathematics is the art of giving the same name to different things."—Henri Poincaré