Rchr
J-GLOBAL ID:201401007757659207   Update date: Dec. 19, 2023

Okumura Hiroshi

オクムラ ヒロシ | Okumura Hiroshi
Affiliation and department:
Job title: 教授
Homepage URL  (1): https://www.researchgate.net/profile/Hiroshi-Okumura
Research field  (1): Geometry
Research keywords  (5): Division by zero ,  Computer discovered mathematics ,  origami ,  Wasan geometry, sangaku ,  arbelos
Papers (182):
  • Hiroshi Okumura, Dao Thanh Oai. Twin circles of a generalized arbelos with division by zero 1/0 = 0. Sangaku Journal of Mathematics. 2023. 7. 146-150
  • Hiroshi Okumura. Enomoto's problem in Wasan geometry. Mathematical Gazette. 2023. 107. 39. 514-516
  • Hiroshi Okumura. A configuration arising from Problem 2023-1-1. Sangaku Journal of Mathematics. 2023. 7. 32-34
  • Hiroshi Okumura, Kousik Sett. The arbelos in Wasan geometry: the Aida arbelos and Problem 2023-1-5. Sangaku Journal of Mathematics. 2023. 7. 29-31
  • Hiroshi Okumura. A rare sangaku problem involving three congruent circles. Sangaku Journal of Mathematics. 2023. 7. 1-8
more...
MISC (50):
  • Hiroshi Okumura. Mutually touching three semicircles inscribing in a circle. Shotoh Sugaku. 2023. 95. 36-37
  • Hiroshi Okumura. Problems 2023-1. Sangaku Journal of Mathematics. 2023. 7. 9-12
  • Hiroshi Okumura. A sangaku with five problems presenting the relation z^2=4xy: Part 3. Shotoh Sugaku. 2022. 93. 20-23
  • Hiroshi Okumura. Exposition on the problem 91-1. Shotoh Sugaku. 2021. 92. 95-99
  • Hiroshi Okumura. A sangaku with five problems presenting the relation z^2=4xy: Part 2. Shotoh Sugaku. 2021. 92. 18-22
more...
Books (6):
  • Handbook of the mathematics of the arts and sciences
    Springer 2021 ISBN:9783319570716
  • アルベロス 3つの半円がつくる幾何宇宙
    岩波書店 2010
  • Origami3 : Third International Meeting of Origami Science, Mathematics, and Education sponsored by OrigamiUSA
    A.K. Peters 2002 ISBN:1568811810
  • CD-ROM和算書集成 : 中曽根宗邡コレクション
    岩波書店 2001 ISBN:4001301431
  • 情報・システム入門
    東京図書 1996
more...
Lectures and oral presentations  (1):
  • Twin circles in a triangle and its application to an arbelos
    (International Conference "Synergetics and reflection in mathematics education", At Bachinovo, Bulgaria 2010)
Professional career (2):
  • Ph.D. (Bulgarian Academy of Sciences)
  • 理学修士 (岡山大学)
Awards (1):
  • 2003 - 日本数学史学会 桑原賞
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