# Learning and Relearning in Mathematics > Learning and re-learning is continuous in mathematics. When you return to an old subject, you must repeat the useful mechanism I’ve been touting throughout this book: to write down characteristic examples that serve as your mental model for a general pattern. Keeping examples in mind—picturesque examples with enough detail that you can descend the ladder of abstraction to compute if necessary—is what fortifies an idea and fertilizes the orchard from which you can pick ripe analogies. --- Date: 20220612 Links to: [Mathematics MOC](Mathematics%20MOC.md) Tags: #review References: * A Programmers Guide to Mathematics, Jeremy Kunn (pg 189)