Learning Functional Programming in Go

MacLane and Eilenberg (1945)

Saunders Mac Lane (left) and Samuel Eilenberg (right) introduced the concepts of categories, functors, and natural transformations in 1945 with their paper titled, A general theory of natural equivalences. In their study of algebraic topology, they gave explicit definitions for objects, maps, and composition of maps, with the goal of understanding the processes that preserve mathematical structure.