# Lebesgue Theory Part 1 (Set Functions)

What is a set function? In fact, what is a function? Before jumping into the deep water, let us take a moment to review the idea of a function, what it is, and how it is useful to us. 1) Definition: Given two non-empty sets and a function is a rule (i.e. a set of instructions) where each… Read More Lebesgue Theory Part 1 (Set Functions)