Editing Z (section)

==Other uses==
{{main article|Z (disambiguation)}}
* In [[mathematics]], {{unichar|2124|(DOUBLE-STRUCK CAPITAL Z)}} is used to denote the set of [[integer]]s. Originally, <math>\mathbb{Z}</math> was just a [[Blackboard bold|handwritten version]] of the bold capital '''Z''' used in printing but, over time, it has come to be used more frequently in printed works too. The variable {{mvar|z}} is also commonly used to represent a [[complex number]].
* In geometry, z is used to denote the third axis in [[Cartesian coordinate system|Cartesian coordinates]] when representing 3-dimensional space.
* In [[chemistry]], the letter ''Z'' is used to denote the [[atomic number]] of an element (number of protons), such as ''Z''=3 for [[lithium]].
* In electrical engineering, ''Z'' is used to denote [[electrical impedance]].
* In [[astronomy]], z is a [[dimensionless quantity]] representing [[redshift]].
* In [[nuclear physics]], ''Z'' denotes the [[atomic number]] and {{SubatomicParticle|Z boson0}} denotes a [[Z boson]].
* In [[computer programming]], Z is the abbreviation for the [[zero flag]].
* In Japan, the [[Z flag]] is a symbol in the national myth, representing the [[Battle of Tsushima]].
* [[Z (military symbol)|Z has been used]] by the [[Russian Armed Forces]] as an [[identifier|identifying symbol]] on its [[military vehicle]]s, during [[Russian invasion of Ukraine|Russia's invasion of Ukraine]]. Russian civilians have used the symbol to express support for the invasion.<ref>{{Cite news |date=2022-03-07 |title=Why has the letter Z become the symbol of war for Russia? |url=https://www.theguardian.com/world/2022/mar/07/why-has-the-letter-z-become-the-symbol-of-war-for-russia |access-date=2022-03-07 |newspaper=[[The Guardian]] }}</ref><ref>{{Cite news |date=2022-03-07 |title=Ivan Kuliak: Why has 'Z' become a Russian pro-war symbol? |work=BBC News |url=https://www.bbc.com/news/world-europe-60644832 |access-date=2022-03-07}}</ref>