Book:Yang Hui/Xugu Zhaiqi Suanfa/Mistake
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- The Puzzles:
- Sun Tsu Suan-Ching
- Yang Hui (c. $1270$ ad) wrote an 'Arithmetic in Nine Sections', which contains the very first extant representation of what we in the West call Pascal's Triangle (from an earlier Chinese source, c. $1000$ ad). His book was called, apparently, Hsu Ku Chai Chi Suan Fa ($1275$). It contains the following magic configuration: ...