Proof 1 The main purpose of proof without words in this book is to make mathematical principles happy. It shows why a particular math proposition is true and tells you how to get started to prove it. In this case, the no-need proof provides a visual clue that stimulates mathematical thinking.
Most of the no need for words in this book is the first in a journal published by the American Mathematical Society And we can find a modern interpretation of the "horseless proof" of ancient China, as well as the 10th century Arab and Renaissance Italy....