purity$65593$ - meaning and definition. What is purity$65593$
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What (who) is purity$65593$ - definition

INFORMAL, LOGARITHMIC NOTATION FOR PROPORTIONS JUST BELOW UNITY
Nines (engineering); Purity (gas); Nine (purity)

Purity Ring discography         
Purity Ring Discography
Purity Ring are a Canadian electronic music duo formed in 2010 consisting of Megan James and Corin Roddick.
purity         
WIKIMEDIA DISAMBIGUATION PAGE
Purity (disambiguation)
n.
1.
Clearness, fineness.
2.
Cleanness, clearness, immaculateness.
3.
Innocence, virtue, guiltlessness, guilelessness, holiness, honesty, integrity, uprightness, truth, simplicity.
4.
Genuineness, excellence, integrity.
5.
Modesty, chastity, chasteness.
Purity (algebraic geometry)         
Purity conjecture; Zariski–Nagata purity; Zariski-Nagata purity
In the mathematical field of algebraic geometry, purity is a theme covering a number of results and conjectures, which collectively address the question of proving that "when something happens, it happens in a particular codimension".

Wikipedia

Nines (notation)

Nines are an informal, logarithmic notation for proportions very near to one, or equivalently percentages very near 100%. Their common uses include grading the purity of materials.

Put simply, "nines" are the number of consecutive nines in a percentage such as 99% (two nines) or a decimal fraction such as 0.999 (three nines). The number of nines of a proportion x is

n i n e s = log 10 ( 1 x ) {\displaystyle \mathrm {nines} =-\log _{10}(1-x)}

However, there are different conventions for stating a non-integer number of nines. 99.5% could be expressed as "two nines five" or 2.3 nines, as outlined below. A completely pure material (x = 1) would have an infinite number of nines.