Tian Fang's work is an item in the special competition of "Nine Chapters Arithmetic". The "Nine Chapters Arithmetic" special competition of the National Youth Cultural Heritage Knowledge Competition has three major schedules, namely, logistics deduction, field work and calculation practice.
Nine chapters arithmetic and math books. The most important of the ten classic books on computing. The author is unknown. In the early years of the Western Han Dynasty, mathematicians such as Zhang Cang and Geng Shouchang added or deleted it, and Liu Hui annotated it as a general edition in The Three Kingdoms Cao Wei.
The book is divided into 9 chapters and 246 examples. Its contents include nine chapters, such as Fang Tian, Su, Decline, Less and Wider, Commercial Merit, Accidental Loss, Surplus and Loss, Equation and Pythagoras, which systematically summarizes China's mathematical achievements from pre-Qin to Eastern Han Dynasty.
Among them, negative numbers, fractional calculation and simultaneous linear equations are all mathematical achievements of world significance. The above achievements are 800 years earlier than India and more than 0/000 years earlier than Europe. This book was introduced to Korea and Japan during the Sui and Tang Dynasties and was designated as a textbook. Now it has been translated into English, Japanese, Russian and other languages. The National Library has Nine Chapters of Arithmetic handed down from generation to generation in the Southern Song Dynasty.
The influence of later generations
Nine Chapters Arithmetic is the earliest book in the world that systematically describes fractional operation. Among them, the residual algorithm is an amazing creation; The chapter "Equation" also expounds the negative number and its addition and subtraction algorithm for the first time in the history of world mathematics.
In algebra, Nine Chapters Arithmetic put forward the concept of negative number and the law of addition and subtraction of positive and negative numbers for the first time in the history of world mathematics. The solution of linear equations taught in middle school is basically the same as that introduced in Chapter 9 Arithmetic. Paying attention to practical application is a remarkable feature of nine chapters arithmetic. Some knowledge of the book has also spread to India and Arabia, and even to Europe through these areas.