Sangaku Journal of Mathematics
Published by the VUZF University of Finance, Business and Entrepreneurship,
Sofia, Bulgaria
About this Journal
| Editorial Board
| Instructions for Authors
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ISSN 2534-9562
Editors-in Chief:
Hiroshi Okumura, Professor, Ph.D.
Maebashi Gunma, 371-0123, Japan
e-mail: hokmr@protonmail.com
Sava Grozdev, Professor, DSc,
VUZF University of Finance, Business and Entrepreneurship, Sofia, Bulgaria
e-mail: sava.grozdev@gmail.com
Volume 2 (2018)
Volume 1 (2017)
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Hiroshi Okumura, Japanese mathematics, pp.1-6.
The paper is reprinted from "Symmetry: Culture and Science",Volume 12
(1-2) 79-86 (2001) with permission from the publisher.
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Problems 2017-1, pp.7-10.
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Problems 2017-2, pp.11-12.
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Francisco Javier García Capitán,
Solution to 2017-1 Problem 1, pp.13-15.
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Yasuo Kanai and Hiroshi Okumura,
A three tangent congruent circle problem, pp.16-20.
Supplementary material: animation.gif
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Problems 2017-3, pp.21-23.
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Hiroshi Okumura,
Configurations of congruent circles on a line, pp.24-34.
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Hiroshi Okumura,
Theorems on two congruent circles on a line, pp.35-38.
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Hiroshi Okumura,
A note on the problems involving congruent circles in Tenzan Kaitei, pp.39-41.
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Hiroshi Okumura,
Haga's theorems in paper folding and related theorems in Wasan geometry Part 1, pp.42-56.
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