中国最古の漆の寝台が復活、修復作業に17年　成都

【1月14日 CNS】中国・四川省（Sichuan）の成都文物考古研究院によると、成都市（Chengdu）の商店街で発見された船棺墓（せんかんぼ）から出土した竹や木でできた漆器類の文化財290点の保護・修復作業が8日、ついに完了した。作業は17年の歳月を要したという。これらの文化財は、現在まで中国で発見された中で最古で、構造的にも完全な状態を保っている。中には、約2500年前の戦国時代初期の漆塗りの寝台も含まれている。

　漆塗りの寝台には竜の文様や蟠螭文（ばんちもん、春秋時代に銅器などに用いられた文様）などの装飾が施されている。3.27メートルから26.5センチまでの45の部材から組み立てられている。

成都文物考古研究院の職員によると、「復元図をもとに修復作業を行ったが、漆塗りの寝台の部材はばらばらに埋められていた。少なくとも前漢の時代には墓を盗掘されていたので、修復作業は困難を極めた」と話す。

　成都市は中国の漆芸が始まった地域の中心にあり、湖南省（Hunan）長沙市（Changsha）の馬王堆漢墓（まおうたいかんぼ）と前漢の時代にわたり朝鮮半島北部の楽浪地方に残る墳墓・楽浪漢墓（らくろうかんぼ）からも、成都で制作された漆器が出土している。また、成都市の商店街で発見された船棺墓から出土した漆器類からは、当時の経済状況や漆芸、後蜀(こうしょく)文化の歴史がわかる。(c)CNS/JCM/AFPBB News

※この記事は、CNS（China News Service）のニュースをJCMが日本語訳したものです。CNSは1952年に設立された中華人民共和国の国営通信社です。http://www.afpbb.com/articles/-/3158196

とても興味深く読みました：

\title{\bf Announcement 213: An interpretation of the identity $ 0.999999...... =1$

}

\author{{\it Institute of Reproducing Kernels}\\

Kawauchi-cho, 5-1648-16,\\

Kiryu 376-0041, Japan\\

\date{}

\maketitle

{\bf Abstract: } In this announcement, we shall give a very simple interpretation for the identity: $ 0.999999......=1$.

\bigskip

\section{ Introduction}

On January 8, 2008, Yuusuke Maede, 8 years old boy, asked the question, at Gunma University, that (Announcement 9(2007/9/1): Education for genius boys and girls):

What does it mean by the identity:

0.999999......=1?

at the same time, he said: I am most interesting in the structure of large prime numbers. Then, a teacher answered for the question by the popular reason based on the convergence of the series: $0.9, 0.99, 0.999,... $. Its answer seems to be not suitable for the 8 years old boy with his parents (not mathematicians). Our answer seems to have a general interest, and after then, such our answer has not been heard from many mathematicians, indeed.

This is why writting this announcement.

\medskip

\bigskip

\section{An interpretation}

\medskip

In order to see the essence, we shall consider the simplist case:

\begin{equation}

\frac{1}{2} + \frac{1}{2^2} + \frac{1}{2^3} + ... = 1.

\end{equation}

Imagine a tape of one meter length, we will give its half tape: that is,

\begin{equation}

\frac{1}{2}.

\end{equation}

Next, we will give its (the rest's half) half tape; that is, $\frac{1}{2}\cdot \frac{1}{2} = \frac{1}{2^2}$, then you have, altogether

\begin{equation}

\frac{1}{2} + \frac{1}{2^2} .

\end{equation}

Next, we will give the last one's half (the rest's half); that is, $\frac{1}{2}\cdot \frac{1}{2} \cdot \frac{1}{2}= \frac{1}{2^3}$,

then, you have, altogether

\begin{equation}

\frac{1}{2} + \frac{1}{2^2} + \frac{1}{2^3}.

\end{equation}

By this procedure, you will be able to obtain the small tapes endressly. Imagine all the sum as in the left hand side of (2.1). However, we will see that this sum is just the division of the one meter tape. Therefore, we will be able to confim the identity (2.1), clearly.

The question proposed by Y. Maede is just the small change the ratio $\frac{1}{2}$ by $\frac{9}{10}$.

\bigskip

\section{ Conclusion}

Y. Maede asked the true sense of the limit in the series:

0.999999.....

that is, this series is approaching to 1; however, is it equal or not ? The above interpretation means that the infinite series equals to one and it is just the infinite division of one. By this inverse approarch, the question will make clear.

\medskip

\bigskip

\section{Remarks}

Y. Maede stated a conjecture that for any prime number $p$ $( p \geqq 7)$, for $1$ of $ - 1$

\begin{equation}

11111111111

\end{equation}

may be divided by $p$ (2011.2.6.12:00 at University of Aveiro, by skype)

\medskip

(No.81, May 2012(pdf 432kb)

www.jams.or.jp/kaiho/kaiho-81.pdf).

\medskip

This conjecture was proved by Professors L. Castro and Y. Sawano,

independently. Y. Maede gave later an interesting interpretation for his conjecture.

\medskip

(2015.2.26)

\end{document}

\title{\bf Announcement 214: Surprising mathematical feelings of a 7 years old girl

}

\author{{\it Institute of Reproducing Kernels}\\

Kawauchi-cho, 5-1648-16,\\

Kiryu 376-0041, Japan\\

\date{}

\maketitle

{\bf Abstract: } In this announcement, we shall give the two surprising mathematical feelings of 7 years old girl Eko Michiwaki who stated the division by 3 of any angle and the division by zero $100/0=0$ as clear and trivial ones. As well-known, these famous problems are historical, and her results will be quite original.

\bigskip

\section{ Introduction}

We had met, 7 years old girl, Eko Michiwaki on November 23, 2014 at Tokyo Institute of Technology and August 23, 2014 at Kusatu Seminor House, with our colleagues. She, surprisingly enough, stated there repeatedly the division by 3 of any angle and the division by zero $100/0=0$ as clear and trivial ones. As well-known, these famous problems are historical and her results will be quite original.

\section{The division of any angle by 3}

\medskip

Eko Michiwaki said:

divide a given angle with 4 equal angles; this is simly done. Next, we divide one divided angle

with 4 equal angles similarly and the three angles add to other 3 angles. By continuing this procedure, we will be able to obtain the division by 3 of any angle. Her idea may be stated mathematically as follows:

\frac{1}{4} + \frac{1}{4^2} + \frac{1}{4^3} + ... ...= \frac{1}{3}.

However, her idea seems to be more clear than the above mathematical formula. For this sentence, see \cite{ann3} for the sense of the limit.

\bigskip

\section{The division by zero $100/0=0$}

\medskip

As we stated in \cite{ann1}, she stated that division by zero $100/0=0$ is clear and trivial for our recent results \cite{cs,kmsy,s,ttk}. The basic important viewpoint is that division and product are different concepts and the division by zero $100/0=0$ is clear and trivial from the own sense of the division, independently of product \cite{ann1}. From the viewpoint, our colleagues stated as follows:

\medskip

On July 11, 2014, Seiichi Koshiba and Masami Yamane said at

Gunma University:

The idea for the division of Hiroshi Michiwaki and Eko Michiwaki (6 years

old daughter) is that division and product are different concepts and they

were calculated independently for long old years, by repeated addition and

subtraction, respectively. Mathematicians made the serious mistake for very

long years that the division by zero is impossible by considering that division

is the inverse operation of product. The division by zero was, however, clear

and trivial, as z/0=0, from the own nature of division.

\medskip

On February 21, 2015, Seiichi Koshiba and Masami Yamane visited our Institute and we confirmed this meaning of these sentences and the basic idea on the division by zero.

\medskip

(2015.2.27)

\bigskip

\bibliographystyle{plain}

\begin{thebibliography}{10}

\bibitem{cs}

L. P. Castro and S.Saitoh, Fractional functions and their representations, Complex Anal. Oper. Theory {\bf7} (2013), no. 4, 1049-1063.

\bibitem{kmsy}

M. Kuroda, H. Michiwaki, S. Saitoh, and M. Yamane,

New meanings of the division by zero and interpretations on $100/0=0$ and on $0/0=0$,

Int. J. Appl. Math. Vol. 27, No 2 (2014), pp. 191-198, DOI: 10.12732/ijam.v27i2.9.

\bibitem{s}

S. Saitoh, Generalized inversions of Hadamard and tensor products for matrices, Advances inLinear Algebra \& Matrix Theory. Vol.4 No.2 (2014), 87-95.http://www.scirp.org/journal/ALAMT/

\bibitem{ttk}

S.-E. Takahasi, M. Tsukada and Y. Kobayashi, Classification of continuous fractional binary operations on the real and complex fields, Tokyo Journal of Mathematics (in press).

\bibitem{ann1}

Announcement 179: Division by zero is clear as z/0=0 and it is fundamental in mathematics,

Institute of Reproducing Kernels, 2014.10.22.

\bibitem{ann2}

Announcement 185: The importance of the division by zero $z/0=0$, Institute of Reproducing Kernels, 2014.11.28.

\bibitem{ann3}

Announcement 213: An interpretation of the identity $ 0.999999...... =1$, Institute of Reproducing Kernels, 2015.2.26.

\end{thebibliography}

\end{document}

\documentclass[12pt]{article}

\usepackage{latexsym,amsmath,amssymb,amsfonts,amstext,amsthm}

\numberwithin{equation}{section}

\begin{document}

\title{\bf Announcement 388: Information and ideas on zero and division by zero\\

(a project)\\

(2017.10.29)}

\author{{\it Institute of Reproducing Kernels}\\

Kawauchi-cho, 5-1648-16,\\

Kiryu 376-0041, Japan\\

}

\date{\today}

\maketitle

The Institute of Reproducing Kernels is dealing with the theory of division by zero calculus and declares that the division by zero was discovered as $0/0=1/0=z/0=0$ in a natural sense on 2014.2.2. The result shows a new basic idea on the universe and space since Aristotelēs (BC384 - BC322) and Euclid (BC 3 Century - ), and the division by zero is since Brahmagupta (598 - 668 ?).

In particular, Brahmagupta defined as $0/0=0$ in Brāhmasphuṭasiddhānta (628), however, our world history stated that his definition $0/0=0$ is wrong over 1300 years, but, we showed that his definition is suitable.

For the details, see the references and the site: http://okmr.yamatoblog.net/

We would like to write some story on zero and division by zero. For this purpose, we would like to gather some wide ideas and feelings on the zero and division by zero. For some precise facts and some wide viewpoints on these topics, please kindly send your ideas and feelings. For some valuable ones, we would like to immediately distribute them as in examples on the division by zero (now over 670 items).

For your kind comments, several lines will be well-comed

and or in A4 one page in word.

Please kindly send your ideas to the e-mail address:

\medskip

kbdmm360@yahoo.co.jp

\medskip

We would like to hear your valuable and interesting ideas on these topics.

\bibliographystyle{plain}

\begin{thebibliography}{10}

\bibitem{cs}

L. P. Castro and S. Saitoh, Fractional functions and their representations, Complex Anal. Oper. Theory {\bf7} (2013), no. 4, 1049-1063.

\bibitem{kmsy}

M. Kuroda, H. Michiwaki, S. Saitoh, and M. Yamane,

New meanings of the division by zero and interpretations on $100/0=0$ and on $0/0=0$,

Int. J. Appl. Math. {\bf 27} (2014), no 2, pp. 191-198, DOI: 10.12732/ijam.v27i2.9.

\bibitem{ms16}

T. Matsuura and S. Saitoh,

Matrices and division by zero　z/0=0,

Advances in Linear Algebra \& Matrix Theory, 2016, 6, 51-58

Published Online June 2016 in SciRes. http://www.scirp.org/journal/alamt

\\ http://dx.doi.org/10.4236/alamt.2016.62007.

\bibitem{ms18}

T. Matsuura and S. Saitoh,

Division by zero calculus and singular integrals. (Submitted for publication)

\bibitem{mms18}

T. Matsuura, H. Michiwaki and S. Saitoh,

$\log 0= \log \infty =0$ and applications. Differential and Difference Equations with Applications. Springer Proceedings in Mathematics \& Statistics.

\bibitem{msy15}

H. Michiwaki, S. Saitoh and M.Yamada,

Reality of the division by zero $z/0=0$. IJAPM International J. of Applied Physics and Math. 6(2015), 1--8. http://www.ijapm.org/show-63-504-1.html

\bibitem{mos17}

H. Michiwaki, H. Okumura and S. Saitoh,

Division by Zero $z/0 = 0$ in Euclidean Spaces,

International Journal of Mathematics and Computation, 28(2017); Issue 1, 2017), 1-16.

\bibitem{osm17}

H. Okumura, S. Saitoh and T. Matsuura, Relations of $0$ and $\infty$,

Journal of Technology and Social Science (JTSS), 1(2017), 70-77.

\bibitem{ps18}

S. Pinelas and S. Saitoh,

Division by zero calculus and differential equations. Differential and Difference Equations with Applications. Springer Proceedings in Mathematics \& Statistics.

\bibitem{s14}

S. Saitoh, Generalized inversions of Hadamard and tensor products for matrices, Advances in Linear Algebra \& Matrix Theory. {\bf 4} (2014), no. 2, 87--95. http://www.scirp.org/journal/ALAMT/

\bibitem{s16}

S. Saitoh, A reproducing kernel theory with some general applications,

Qian,T./Rodino,L.(eds.): Mathematical Analysis, Probability and Applications - Plenary Lectures: Isaac 2015, Macau, China, Springer Proceedings in Mathematics and Statistics, {\bf 177}(2016), 151-182. (Springer) .

\bibitem{ttk}

S.-E. Takahasi, M. Tsukada and Y. Kobayashi, Classification of continuous fractional binary operations on the real and complex fields, Tokyo Journal of Mathematics, {\bf 38}(2015), no. 2, 369-380.

\bibitem{ann179}

Announcement 179 (2014.8.30): Division by zero is clear as z/0=0 and it is fundamental in mathematics.

\bibitem{ann185}

Announcement 185 (2014.10.22): The importance of the division by zero $z/0=0$.

\bibitem{ann237}

Announcement 237 (2015.6.18): A reality of the division by zero $z/0=0$ by geometrical optics.

\bibitem{ann246}

Announcement 246 (2015.9.17): An interpretation of the division by zero $1/0=0$ by the gradients of lines.

\bibitem{ann247}

Announcement 247 (2015.9.22): The gradient of y-axis is zero and $\tan (\pi/2) =0$ by the division by zero $1/0=0$.

\bibitem{ann250}

Announcement 250 (2015.10.20): What are numbers? - the Yamada field containing the division by zero $z/0=0$.