Chang (Yuan)

Chang (Yuan) was a prominent Chinese mathematician and astronomer from the Ming Dynasty. He is best known for his work on calendar reform and for developing methods to improve the accuracy of astronomical predictions. His contributions include refining calendar calculations and advancing mathematical techniques used in astronomy. Chang's work helped China achieve better synchronization between its calendar and the seasons, which was vital for agriculture, governance, and cultural practices. Overall, his efforts linked mathematical innovation with practical applications, making significant advances in Chinese science and technology during his time.