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Nobuya Nakamura

Chairman of Nagano prefecture WASAN society

3612-12 ko Komoro city Nagano pref. Japan

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I translated it into English while noting the following.

a Because the diameter was always used in WASAN, I proved by using

not the radius but the diameter.

b It explained a little in detail because there were a lot of problems that

the contact relation was not clearly written in WASAN.

c I proved that even the junior high school student ar the high school

student understood as easily as possible.

d The problem that proof was difficult and has already been proven

decided to quote it.

When you are dissatisfied about my proof, there is eRSTUfg h

ijkWlmnopYin Japan Academy though I have not looked yet, and

refer to it, please.

WASAN is one of the Japanese cultures in Edo period. In my mind, there

is a wish that wants to introduce the culture to people in the world.

If this book becomes a help when the researcher solves the problem, I am

very glad, too.

April 30, 2010

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