Here are a few additional written articles on what a Y-combinator is. -Stack Overflow, "What is a Y-combinator?": https://stackoverflow.com/questions/93526/wha

Here are a few additional written articles on what a Y-combinator is. -Stack Overflow, "What is a Y-combinator?": https://stackoverflow.com/questions/93526/what-is-a-y-combinator/94056#94056 https://stackoverflow.com/questions/93526/what-is-a-y-combin... -Wikipedia, "Fixed-point combinator," at the Y combinator sub-section: https://en.wikipedia.org/wiki/Fixed-point_combinator#Y_combinator https://en.wikipedia.org/wiki/Fixed-point_combinator#Y_combi... -For a more academic source, an article from a Johns Hopkins computer science professor is at: https://www.cs.jhu.edu/~jason/465/readings/lambdacalc.html https://www.cs.jhu.edu/~jason/465/readings/lambdacalc.html