Talk:Epsilon

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Two varieties of epsilon

In LaTeX there are two epsilon characters: \epsilon and \varepsilon. The variant version is the one described on the page, but there's no mention of LaTeX's normal epsilon character. I know I've always seen \epsilon used for describing set membership, but \varepsilon for describing small numbers. Can someone add more authoritative information explaining the difference in usages? 192.160.6.252 20:00, 10 Mar 2005 (UTC)

I don't know the answer to your question, but I can say that LaTeX's \epsilon, $\epsilon \,\!$ , is different from its set membership symbol, \in, $\in \,\!$ . —User:Caesura ^(t) 14:43, 21 November 2005 (UTC)[reply]

I added a short description of the Lunate Espilon. As far as I know, the two are effectively interchangeable, although there might be some deeper distinction between two in more formal usage. Pagasaeus 06:29, 30 November 2006 (UTC)[reply]

Maybe it's just my font, but it isn't clear which is the normal epsilon (

\varepsilon

?) and which is the lunate epsilon (

\epsilon

?); The latter symbol is used almost exclusively in the first paragraph. Since fonts can vary, perhaps a small picture would be helpful. --ScottAlanHill 15:11, 5 March 2007 (UTC)[reply]

Right now the article appears to contradict itself. It claims that "The standard symbol for lowercase epsilon is the lunate epsilon", but shows an open one in the infobox image. If the two shapes are indeed interchangeable in ordinary typography (like the open-tail and loop-tail forms of 'g' in Latin script), the article should not claim that one is "standard". Or is it more like the difference between upright and italic Latin 'a'? –Henning Makholm 01:08, 1 January 2008 (UTC)[reply]

This currently appears as a contradiction on my screen:

In TeX, \epsilon (ε) denotes the lunate form.

The parenthetical example there (which in the article source is created using TeX code) does not produce the lunate form. The \varepsilon is an obvious, "fancier" variation, but neither produces the lunate (ϵ). Whether a font issue, a TeX implementation issue, or some other problem, we can assume that it appears incorrect to others, as well.

Are we sure that TeX specifies the lunate form for \epsilon? Either way, I'd probably recommend not saying so, at least until we figure out what's up here. /ninly_(talk) 20:13, 31 August 2010 (UTC)[reply]

Statistics symbol

Trying to find symbol for nonparametric hypotesis test. It is either Epsilon or Pi. Any ideas?

Definition

What is the meaning of the first two sentences of the third paragraph: "Epsilon is one the six numbers that fomulate the universe that make the universe suitable for life within the cosmos.The founder of the sixe numvers is Rees J. Martin." ? This seems vague, misspelled and/or simply incorrect or misleading..

Page contradicts itself

From introduction section "The lunate epsilon ϵ is not to be confused with the set symbol ∈." However the Symbol section states "In mathematics, set membership (often written ∈ instead of ε)." I believe that the latter definition should be deleted. The set symbol is NOT an epsilon, it is just a generic mathematical symbol. 220.233.204.250 05:42, 4 August 2007 (UTC)[reply]

I agree; I've removed it. --ScottAlanHill 06:58, 5 August 2007 (UTC)[reply]

Epsilon

Epsilon Tekstil ve Çanta üzerine kurulmuş bir firma. 1986 den beri varlar. daha geniş bilgi için: http://www.epsilon.com.tr —Preceding unsigned comment added by 85.96.136.247 (talk) 12:57, 15 June 2009 (UTC)[reply]

semi-protected?

SO it says this is semi-protected indefinitely due to high risk of vandalism. There doesn't seem to be any that has happened recently and there is no mention of any on the talk page. Why not lock down every article since someone MIGHT vandalize them too?

Hello?