lizherenn al [[Lizherenneg ar gresianeg|lizherenneg c’hresianek]] eo '''tau''' ταύ (Τ, τ) hag a dalvez da 300 hervez ar sistem niverenniñ gresianek
Distaget e vez [[LFE]] [t] ken e [[
Gresianeg|gresianek klasel]] hag e [[Gresianeg|gresianeg a-vremañ]].
Diorroet e oa bet diwar patrom al [[Lizherenneg fenisek|lizherenn fenisek]] ''tau'' [[Skeudenn:Phoenician taw.png|20px|Aleph]].
War-lerc'h e oa bet diorroet ivez al lizherennoù
[[Lizherenneg latin|latin]] ha [[Lizherenneg kirillek|kirillek]] T diwar al lizherenn c'hresianek-mañ d'he zro.
== Implijoù all ==
<!--The symbolism of the [[cross]] was connected not only to the letter [[chi (letter)|chi]], but also to tau, the equivalent of the last letter in the [[Phoenician alphabet|Phoenician]] and Old Hebrew alphabets, and which was originally cruciform in shape.
The lower-case letter τ is used as a symbol for:
* [[Torque]], the rotational force in [[mechanics]].
* The elementary [[tau lepton]] particle in [[particle physics]].
* The lifetime of a [[spontaneous emission]] process.
* The [[time constant]] of any device, such as an [[RC circuit]].
* A [[correlation coefficient|coefficient of correlation]] — see [[Kendall's tau]].
* The [[Golden ratio]] 1.618... (although [[phi (letter)|φ]] (phi) is more common)
* [[Ramanujan's tau function]] in [[number theory]].
* Tau in [[astronomy]] is a measure of [[opacity]], or how much sunlight cannot penetrate the atmosphere.
* [[Tau (protein)|Tau]] in [[biochemistry]] is a [[protein]] associated to [[microtubule]]s.
* [[Shear stress|Shear]] [[Stress (physics)|stress]] in [[continuum mechanics]].
* [http://www.research.att.com/~njas/sequences/A002183 Number of divisors of highly composite numbers]
Other uses of Tau:
* In ancient times, a symbol for [[life]] and/or [[resurrection]], whereas the 8th letter of the Greek alphabet, [[theta]], was considered the symbol of [[death]]; many say that these two symbols created today’s plus (+) and minus (−) symbols
* In Biblical times, the Tau cross was put on men to distinguish those who lamented sin, although newer versions of the Bible have replaced the ancient term “Tau” with “mark” (Ezekiel 9:4). Resonating with this, the Hebrew form of the word Tau is pronounced tov, which means "marking."
* The prefix of many stars, via the [[Bayer designation | Bayer]] stellar designation system.-->
== Gwelet ivez ==