arrangement of natural numbers on circles where the sum of the numbers on each circle and the sum of numbers on diameter are identical
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Article · 中文
幻圆是组合数学的一个分枝,将自然数排列在多个同心圆或多个连环圆上,使各圆周上数字之和相同,几条直径上的数字和也相同。著名的同心幻圆有南宋数学家杨辉的攒九图和的太衍五十图。
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