Nam Byeong-gil explained

Nam Byeong-gil (1820–1869), also known as Nam Sang-gil (南相吉, 남상길), courtesy name Jasang, art name Yugiljae or Hyecheon, was a Korean mathematician and astronomer of the Joseon period. He was a member of the Uiryeong Nam clan.^[1] His brother Nam Byeong-cheol (南秉哲) was also a noted astronomer.^[2]

His works included:^[1]

• Siheon giyo (時憲紀要)
• Seonggyeong (星鏡)
• Yangdo uidoseol (量度儀圖說)
• Chubo cheoprye (推步捷例)
• Chiljeong bobeop (七政步法)
• Taeyang chulippyo (太陽出入表)
• Seonhak jeongui (算學正義)
• Seontaek giyo (選擇紀要)
• Jungseong sinpyo (中星新表)
• Chunchu ilsiggo (春秋日食攷)

Further reading

• Book: Ying, Jia-Ming. Mathematics of Takebe Katahiro and History of Mathematics in East Asia. Nam Byeong-gil (1820–1869): A Confucian Mathematician and a "Promoter" of Mathematics in Late Joseon Period. 978-4-86497-057-0. Ogawa. Tsukane. Morimoto. Mitsuo. 2014. Mathematical Society of Japan.

Notes and References

1. Web site: Yi Eun-seong . 남병길(南秉吉). ko. Nam Byeonggil. 12 June 2021. Encyclopedia of Korean Culture.
2. Astronomy in Korea. Rufus. W. Carl. 1936. Transactions of the Korea Branch of the Royal Asiatic Society. 26. 1–48.