User:Optional4000

Hello. Welcome to my wikipedia homepage!! My name is Yoshiyuki Yamaguchi living in Japan.

I would like to request your information or discussion about any topics. （どんなご意見／ご感想もお待ちしております。）

I like to edit the articles about economics and history. Concerning the Western Europe history, I have learned much but I cannot know about the details. So if you have any information about the Western Europe history, please help me. Do you know something about the Greek, please lesson me. I know some about the Greek grammar in Greek lesson at university.

Now I'm learning the Network system and the embedded system of computer.

I would like to hearing from you.

Ανυπομονώ να δω την άποψή σας.(Thank you.)

Wikipedia:Babel

jaこの利用者は日本語を母語としています。

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This user can speak Japanese.

ja-ksbこの利用者はヤヤコの時から関西弁使てる生粋の関西人ですねん。

en-3This user can contribute with an advanced level of English.

fr-2Cet utilisateur peut contribuer avec un niveau intermédiaire en français.

pt-1Este usuário/utilizador pode contribuir com um nível básico de português.

it-1Quest'utente può contribuire con un livello semplice di italiano.

de-1Dieser Benutzer hat grundlegende Deutschkenntnisse.

nl-1Deze gebruiker bezit beginnende kennis van het Nederlands.

el-1Αυτός ο χρήστης μπορεί να συνεισφέρει σε βασικού επιπέδου ελληνικά.

zh-1該用戶能以基本的中文進行交流。
该用户能以基本的中文进行交流。

Search user languages

This user would like to live in Kyoto.

This user lives in Japan.
この利用者は日本に住んでいます。

This user is from Japan.

This user's favourite colour is purple.

This user is a member of Wikipedia.

This user has a channel on YouTube.

YThis user prefers Yahoo over Google.G

Y!This user uses Yahoo! as a primary search engine.

This user lives for black olive pizza.

This user loves to eat fries, or chips.

This user really really likes a lot of red pepper.

This user loves to eat beef.

H₂OThis user drinks water regularly.

This user drinks alcohol.

This user is a Go player.

This user is a shogi player.

This user is interested in history.

This user is interested in the Crusades.

This user is interested in the Vietnam War.

This user is interested in World War I (1914–1918) and World War II (1939–1945).

This user is interested in
ancient civilizations.

這個用戶對中國歷史感興趣。
这个用户对中国历史感兴趣。
This user is interested in Chinese history.

This user is interested in the History of France.

This user is an advanced mathematician.

${\sqrt {2}}$This user knows how to prove that the square root of two is irrational.

$e\neq {\frac {p}{q}}$This user can prove that the number, e, is irrational.

$\pi \neq {\frac {p}{q}}$

This user can prove that $\pi$ is irrational.

This user knows how to
Find x.

$\sum _{n=1}^{\infty }{\frac {n^{x}}{x!}}$This user understands capital sigma and pi notation, and you should too!$\prod _{n=1}^{\infty }{\frac {n^{x}}{x!}}$

Pi ≈ 3.1415926535897932384626

$0.{\bar {9}}$=1This user knows that 0.999... is exactly 1, but acquired a migraine learning it.

$.{\bar {0}}1$This user believes in the existence of the infinitesimal and can prove its existence.

This user is a Bayesian.

This user knows intermediate
music theory.

This user is interested in the natural sciences.

This user is interested in Paleontology.

This user plays association football.

This user's favourite subject is Economics.

HISThis user's favourite subject is History.

FRThis user's favourite subject is French.