"Nine Chapters on the Mathematical Art" is an ancient Chinese mathematical text, believed to have been compiled during the Han Dynasty. It consists of nine sections that cover various mathematical topics, including arithmetic, geometry, and the solving of equations. The work is notable for its practical applications, particularly in areas like land measurement and taxation. The text is structured as a series of problems and solutions, making it accessible for readers. It also introduces methods such as the method of elimination and matrix theory, which have influenced later mathematical developments. Overall, it serves as a foundational work in the history of mathematics in China.