Quöntext voh da Seiten Zoih auhschauh

[[Datei:Zahlbereiche update.svg|mini|270px|A Iwasicht iwa Zoihsysteme. Blau reprensentiad Klassn.]]

A '''Zoih''', [[Pl.]]: '''Zoihn''', (dt.: '''Zahl''', [[Pl.]]: '''Zahlen''', [[englische Sproch|engl.]]: ''number'') is a [[Mathematik|mathematischs]] Objekt zan Zehjn, Messn und Nummarian. De uaspringlichn Zoihn san sognennde ''natialiche Zoihn'', wia 1, 2, 3 und so weida.<ref>{{Cite journal|title=number, n.|url=http://www.oed.com/view/Entry/129082|journal=OED Online|language=en-GB|publisher=Oxford University Press}}</ref> Es gibd in da Mathematik owa an Haffa ondare Zoihnklassn. Mid "Zoih" ko ma im Oidog a Woat (Zoihwoat), a Symboi (Zoihzeichn) oda a mathematische Abstrakzion moana.

Zoihn san de [[Baustoa]]na vo da Mathematik und de Grundlog vo jeda [[Wissnschoft]] und [[Technik]]. 

== Klassifikazion ==

Im Laff vo da [[Gschicht]] vo da Mathematik san imma meah Zoihnklassn dazuakemma.

* '''Natialiche Zoihn''' - san de Zoihn, de wo ma zan Zehjn vawendn: 1, 2, 3 ...
* '''Gonze Zoihn''' - san de natialichn Zoihn plus de negativn Zoihn: -1, -2, -3 ...
* '''Razionoie Zoihn''' - san de gonzn Zoihn plus de Bruchzoihn: 1/2, 1/3, 1/4 ...
* '''Reeje Zoihn''' - san razionoie Zoihn plus irrazionoie Zoihn (des san [[Dezimoisystem|Dezimoizoihn]] mid unendli vuin Stejn): <math>\pi = 3.14159265358979\dots</math> <math>\sqrt{2} = 1.41421356237\dots</math>
* '''Komplexe Zoihn''' - san reeje Zoin plus imaginäre Eihheit (de Wuazl aus -1): <math>a+b\cdot i</math> (a und b san reeje Zoihn, i de imagineare Eihheit)

== Beleg ==
<references />

==Im Netz==
{{Commons|Numbers|Zoihn}}
* {{SpringerEOM |title=Number |id=Number |oldid=11869 |first=V.I. |last=Nechaev}}
* {{cite web|last=Tallant|first=Jonathan|title=Do Numbers Exist?|url=http://www.numberphile.com/videos/exist.html|work=Numberphile|publisher=Brady Haran|accessdate=2017-06-06|archiveurl=https://web.archive.org/web/20160308015528/http://www.numberphile.com/videos/exist.html|archivedate=2016-03-08|offline=yes}}
*[https://web.archive.org/web/20171028042316/http://freepages.history.rootsweb.ancestry.com/~catshaman/13comp/0numer.htm Mesopotamian and Germanic numbers]
* [http://www.bbc.co.uk/programmes/p003hyd9 BBC Radio 4, In Our Time: Negative Numbers]
* [http://www.gresham.ac.uk/lectures-and-events/4000-years-of-numbers '4000 Years of Numbers'], lecture by Robin Wilson, 07/11/07, Gresham College (available for download as MP3 or MP4, and as a text file).
* {{cite web |url=http://www.npr.org/sections/krulwich/2011/07/22/138493147/what-s-your-favorite-number-world-wide-survey-v1 |title=What's the World's Favorite Number? |accessdate=2011-09-17 |date=2011-06-22}}; {{cite web |url=http://www.npr.org/templates/transcript/transcript.php?storyId=139797360 |title=Cuddling With 9, Smooching With 8, Winking At 7 |date=2011-08-11 |accessdate=2011-09-17}}
* [http://oeis.org On-Line Encyclopedia of Integer Sequences]

[[Kategorie:Mathematik]]