Homepage of Yutaka Nishiyama(西山豊)


Boomerang Instructions in 70 Languages
 Last updated 26th Feb 2015

             Boomerang by Prof Yutaka Nishiyama at river side of Yodo in 1992


Sepak Takraw Ball

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数学コラム
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エレガントな解答

Plus online magazine of Cambrigde University, UK

Mysterious Number 6174, Mar 2006
Most popular article!
Winning Odds, June 2010 Unit Fractions, Feb 2012
50 Visions of Mathematics
May 2014
Circles rolling on circles
May 2014

            Topics   ( Old Topics since Jan 2011 )


World Univ. Ranking registered 127/200.
No.201 [6174] Math Teachers' Circle Network の Winter/Spring 2015 に Mysterious Number 6174 の紹介があります(ここ)(2月18日)。

No.200 [エレガント] 『数学セミナー』2015年3月号の「エレガントな解答をもとむ」欄に、皆既月食(2014年10月8日)に関する問題を出題しました(2月13日)。

No.199 [コラム] 『現代数学』2015年2月号に, 「数学コラム(23): FIFA2014公式球はパネルが6枚」が掲載されました(1月14日)。

No.198 [ミウラ折り] A Comparative Study of Origami Inspired Folded Platesという予稿にミウラ折りの論文が引用されています(ここ)(1月13日)。

         51 Mathematics in Daily Life  (J):Japanese, (S):Spanish, (C):Chinese, (Wi):Wikipedia

1. Boomerang (J)(Wi)(R) 2. Five Petals (J) 3. Fixed Point (J)(Wi) 4. Boolean Algebra (J) 5. Stroboscope (J) 6. Egg Shape (J) (S)
7. Barcodes (J) 8. Harmonic Series (J) 9. Moebius (J) 10. Hexaflexagon (J)(Wi) 11. Inside out (J) 12. Miura Folding (J)
13. Sepak Takraw (J)(P) 14. Increasing of Area (J) 15. 6174 (J)(Wi) 16. Palindrome 196 (J) (Wi) 17. Oldham Coupling (J) 18. Planimeter (J)
19. Sicherman Dice (J) 20. Montmort Theory (J) 21. Random Number (J) 22. Root 2 (J) 23. Cycloid (J) 24. Machin and Pi (J)
25. Burnside Lem. (J)(Q) 26. Heptadecagon (J) 27. Sudoku (J) 28. Odd and Even (J) 29. Curve & Straight (J) 30. Finger Count (J) (S)
31. Writing Direction (J) 32. Penney Ante (J)(C)(Wi) 33. Flex Geometry (J) 34. Van Aubel (J)(Wi) 35. Red or Black (J) 36. Similarity Trans (J)
37. 52 Cycling Cards (J) 38. Straw Flute (J) 39. Minor Keys (J) 40. Benham's Top (J) 41. 2000 Yen (J)(Wi) 42. Unit Fraction (J)(C)
43. Card Shuffle (J) 44. Kruskal Count (J)(F) 45. Triangle 3 Colors (J) (Q) 46. Fullerene C60 (J)
47. Random dots, Regular
48. 19 faces of HexFlex
49. Wheel Question (Q)(J)
50. 1/998001(J)
51. Zeta function (J)

Boomerang

Instraction 70 Langs Precession by top (1) (2)
Patent
For World Peace (JSA)
Kansai Boomerang (KBN) Japan (JBA)
Kvantik 2014

LINK

Steve Humble
(Dr. Maths)
Michael de Villiers
119 Optical Illusions
by Michael Bach
Francis (th)E mule
Penney Ante , Unit frac
Improbable Research

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