author
active 3rd century-4th century Hui Liu
Best known for a landmark 3rd-century commentary on The Nine Chapters on the Mathematical Art, this Chinese scholar helped turn practical calculation into clear mathematical reasoning. His work on geometry, surveying, and approximations of pi made him one of the most influential mathematicians of early China.
1 Audiobook
海島算經
by active 3rd century-4th century Hui Liu
About the author
Little is known for certain about his life, but Liu Hui lived in the state of Cao Wei during the Three Kingdoms period and completed his famous commentary on The Nine Chapters on the Mathematical Art in 263 CE. That commentary did more than explain old problems: it showed how and why the methods worked, giving later readers a rare glimpse of careful mathematical proof in early China.
Liu Hui is especially remembered for his work in geometry. He developed a polygon-based method for approximating pi and wrote clearly about area, volume, and measurement. He is also linked with The Sea Island Mathematical Manual, a short but important text on surveying that applies mathematics to real-world questions such as heights and distances.
What makes his writing endure is its clarity. Rather than treating mathematics as a list of rules to memorize, he tried to uncover the principles beneath the calculations. That practical, curious spirit is a big part of why his work still fascinates historians of science and mathematics today.