If the addition is not equal, the fingerprint will definitely not match, and if the addition is equal, it may not be equal. We can continue to judge in other ways. Addition is a very simple and fast algorithm, so that the results of unequal addition are excluded first.

The Beauty of Mathematics is a book published by People's Posts and Telecommunications Publishing House in May 20 12, and reprinted in Wu Jun in 20 14. This book makes the profound mathematical principles more popular and understandable, so that non-professional readers can also appreciate the charm of mathematics. Through concrete examples, teach readers how to simplify the complex, how to solve engineering problems with mathematics, and how to think creatively without thinking.

A few years ago, the series of articles "The Beauty of Mathematics" was first published on Google Blackboard, which received millions of hits and was highly praised by readers. The reader said that after reading The Beauty of Mathematics, it was discovered that the mathematical knowledge, Markov chain, matrix calculation and even cosine function learned in the university were so cordial and vivid, and it was only then that natural language and information processing were so interesting.

This year, the author, Dr. Wu Jun, almost rewrote all the articles in order to make the profound mathematical principles easier to understand and let non-professional readers appreciate the charm of mathematics. What readers learn through concrete examples is the way of thinking-how to simplify the complex, how to solve engineering problems with mathematics, and how to think about innovation without thinking.