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When was The Nine Chapters on the Mathematical Art compiled?

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Counting boards and markers, or counting rods, were used in China to solve systems of linear equations. This is an example from the 1st century ce. — East Asian mathematics Counting boards and markers, or counting rods, were used in China to solve systems of linear equations. This is an example from the 1st century ce.

The Nine Chapters on the Mathematical Art (Jiuzhang suanshu) was compiled in the 1st century BCE or CE. Specialists currently disagree on the exact date of its completion.1