<human>:  Where does the lambda come from in the lambda calculus?
<bot>: The lambda comes from the Greek letter lambda, which is the smallest letter in the Greek alphabet. The lambda is used to represent a function in the lambda calculus. The lambda calculus is a mathematical system that was developed by Alonzo Church in the 1930s. The lambda calculus is a formal system that allows you to define functions and use them to solve problems.