割圆术 （cyclotomic method），就是不断倍增圆内接正多边形的边数求出圆周长的方法。3世纪中期，魏晋时期的数学家刘徽于公元263年撰写《九章算术注》，在这一...
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Cyclotomic continued proportion was the principal method for studies on infinite series in the Qing Dynasty, which we still have to go into a step further.
割圆连比例曾是清代无穷级数研究中所用的主要方法，但对它的研究目前还不够充分。
At the same time, Archimedes gives an exact proof on the formula of area of circle, with the method of exhaustion method depending on the Cyclotomic.
刘徽之前，希腊的阿基米德用穷竭法也证明了圆的面积公式。
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