Gou Gu Shu in the 18th century Chosun

18세기(世紀) 조선(朝鮮)의 구고술(句股術)

  • Hong, Sung-Sa (Department of Mathematics, Sogang University) ;
  • Hong, Young-Hee (Department of Mathematics, Sookmyung Women's University) ;
  • Kim, Chang-Il (Department of Mathematical Education, Dankook University)
  • Published : 2007.11.30


We investigate the Gou Gu Shu(句股術) in Hong Jung Ha's Gu Il Jib(九一集) and Cho Tae Gu's Ju Su Gwan Gyun(籌書管見) published in the early 18th century. Using a structural approach and Tien Yuan Shu(天元術), Hong has obtained the most advanced results on the subject in Asia. Using Cho's result influenced by the western mathematics introduced in the middle of the 17th century, we study a process of a theoretical approach in Chosun mathematics in the period.