![](http://www.alamy.com/thumbs/6/9E123F62-4C2D-41F4-9E8A-B626B7B0971A/MP3T6F.jpg)
. English: Cheng Dawei magic circle Français : Cercles magiques dans le Suanfa tongzong du mathématicien chinois Cheng Dawei. 1592. Ming dynasty mathematician Cheng Dawei 1149 Suanfatongzong-795-795
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Keywords: ., /, /., 1592., cheng, dawei., dynasty, mathematician, ming