• 제목/요약/키워드: Jeong Yag-yong

검색결과 6건 처리시간 0.037초

다산 정약용의 표류민과 해상국경에 대한 인식 (Jeong YagYong's Perceptions of Sea Refugees and Maritime borderlines)

  • 신재훈
    • Strategy21
    • /
    • /
    • pp.215-240
    • /
    • 2015
  • Jeong YagYong, who are the SilHak Scholar during 18th to 19th century, wrote the Sadaegore with his pupil Lee Cheong. This work is the guide of diplomacy, which are asked to write from King Jeongjo. Although this book was completed after King Jeongjo's death, it harbors the King's thoughts about diplomacy or the relationship with China. Haebanggo, one chapter of the book, is about marine policy and how to treat the castaways. In this chapter, Jeong YagYong provides various ways to deal with these problems in marine area and sea refugee I will examine the Jeong YagYong's thought about the problems and ways to address these problems. Futhermore, I will inquire Jeong's opinion on the boundary in marine area. He recognized that many border transgressions happened in marine area at that time and considered that as urgent political affairs. Haebanggo consists of two parts. First part of the book is about protect own island from other countries. The rest part is about cases of dealing with castaways and their transgression. I argue that Jeong YagYong intended to make distinct borderlines in marine area and empathized the necessity of protecting Joseon's islands from other countries.

정약용의 『구고원류』의 내용과 표현방법 분석 (An Analysis of the Contents and Expression Methods of Jeong Yag-yong's 『Gugo Wonlyu』)

  • 이경언
    • 한국수학사학회지
    • /
    • v.29 no.1
    • /
    • pp.1-16
    • /
    • 2016
  • This study analyzes the contents and expression methods of Jeong Yag-yong's "Gugo Wonlyu". The 530-page long "Gugo Wonlyu" discusses 1541 formulas about Gu, Go, Hyun, Hwa, Gyo; however, it has only the results of formulas and no explanations about their inducement method. Therefore we do not know how he derives and verifies the formulas. In addition, it did not follow the basic form of oriental mathematics textbooks: problem-answer-solution, and presented all the formulas only with characters without using numbers. This is a very distinctive aspect compared to other mathematical textbooks. In addition, the formulas about 5-Hwa and 5-Gyo are addressed exactly in fixed order and covers a formula in various directions. This is a clear evidence that Jeong Yag-yong analyzed and studied the Gugosul thoroughly.

정약용의 구고원류 (Gugo Wonlyu of Jeong Yag-yong)

  • 김영욱
    • 한국수학사학회지
    • /
    • v.32 no.3
    • /
    • pp.97-108
    • /
    • 2019
  • This paper is an outgrowth of a study on recent papers and presentations of Hong Sung Sa, Hong Young Hee and/or Lee Seung On on Gugo Wonlyu which is believed to be written by the famous Joseon scholar Jeong Yag-yong. Most of what is discussed here is already explained in these papers and presentations but due to brevity of the papers it is not understood by most of us. Here we present them in more explicit and mathematical ways which, we hope, will make them more accessible to those who have little background in history of classical Joseon mathematics. We also explain them using elementary projective geometry which allow us to visualize Pythagorean polynomials geometrically.

정약용(丁若鏞)의 산서(算書) 구고원류(勾股源流)의 수학적(數學的) 구조(構造) (Mathematical Structures of Jeong Yag-yong's Gugo Wonlyu)

  • 홍성사;홍영희;이승온
    • 한국수학사학회지
    • /
    • v.28 no.6
    • /
    • pp.301-310
    • /
    • 2015
  • Since Jiuzhang Suanshu, the main tools in the theory of right triangles, known as Gougushu in East Asia were algebraic identities about three sides of a right triangle derived from the Pythagorean theorem. Using tianyuanshu up to siyuanshu, Song-Yuan mathematicians could skip over those identities in the theory. Chinese Mathematics in the 17-18th centuries were mainly concerned with the identities along with the western geometrical proofs. Jeong Yag-yong (1762-1836), a well known Joseon scholar and writer of the school of Silhak, noticed that those identities can be derived through algebra and then wrote Gugo Wonlyu (勾股源流) in the early 19th century. We show that Jeong reveals the algebraic structure of polynomials with the three indeterminates in the book along with their order structure. Although the title refers to right triangles, it is the first pure algebra book in Joseon mathematics, if not in East Asia.

정약용(丁若鏞)의 산서(算書) 구고원류(勾股源流)의 다항식(多項式)의 수학적(數學的) 구조(構造) (Mathematical Structures of Polynomials in Jeong Yag-yong's Gugo Wonlyu)

  • 홍성사;홍영희;이승온
    • 한국수학사학회지
    • /
    • v.29 no.5
    • /
    • pp.257-266
    • /
    • 2016
  • This paper is a sequel to our paper [3]. Although polynomials in the tianyuanshu induce perfectly the algebraic structure of polynomials, the tianyuan(天元) is always chosen by a specific unknown in a given problem, it can't carry out the role of the indeterminate in ordinary polynomials. Further, taking the indeterminate as a variable, one can study mathematical structures of polynomials via those of polynomial functions. Thus the theory of polynomials in East Asian mathematics could not be completely materialized. In the previous paper [3], we show that Jeong Yag-yong disclosed in his Gugo Wonlyu(勾股源流) the mathematical structures of Pythagorean polynomials, namely polynomials p(a, b, c) where a, b, c are the three sides gou(勾), gu(股), xian(弦) of a right triangle, respectively. In this paper, we show that Jeong obtained his results through his recognizing Pythagorean polynomials as polynomial functions of three variables a, b, c.

「제황상유인첩(題黃裳幽人帖)」에 나타난 다산(茶山)의 정원상(庭園想) (Dasan's Conceptual Thoughts on the Garden in 「Jaehwangsangyuincheop」)

  • 정수진
    • 한국조경학회지
    • /
    • v.46 no.5
    • /
    • pp.22-35
    • /
    • 2018
  • 본 연구는 다산 정약용의 의원기(意園記)라 할 수 있는 "제황상유인첩"의 제작 경위와 글에 나타난 주거지의 입지 및 정원 조영의 특성을 분석하여 다산이 추구한 이상적 정원에 대한 생각을 이해하고자 했다. 본 논문은 "제황상유인첩"이 이상적 주거향의 설계도로 기능했을 것으로 가정하였다. 주요 연구 대상은 "제황상유인첩"에 서술된 외부 경관이며, 관련 저작의 분석을 통해 정원 요소와 공간 조영을 수묵화로 시각화하였다. 연구 결과는 다음과 같다. 첫째, "제황상유인첩"은 다산이 강진에서 유배하던 1805년(순조 5) 겨울 보은산방에서 은자의 거처에 대해 물어오던 애제자 황상의 질문에 답하여 써준 글이다. 황상은 이를 참고하여 이후 강진 대구면 천개산 아래 일속산방을 조성하였다. 둘째, "제황상유인첩" 속 주거지는 배산임수의 입지를 취하였고 생활과 여가를 겸하는 곳으로 사용되었다. 이곳은 은둔하고 있는 선비의 이상적 주거지였다. 셋째, "제황상유인첩"에 나타난 정원의 특성은 주거지 입지에 있어서의 자연지리의 운용, 다양한 식물재료의 실용적 이용, 정원의 물리적 경계 확장, 정원 요소 향유에 있어서 공감각적 미학 추구, 확장된 정원에서의 적극적 풍류체험으로 살펴볼 수 있었다. "제황상유인첩"은 유배 이후 다산이 원했던 은일하는 선비의 아취 있는 삶의 모습을 담았다. 이는 일속산방으로 구현되었다. "제황상유인첩"은 다산의 정원상이 충실하게 반영된 실현가능한 주거의 이상향으로 해석되었다.