What is "epsilon"

from Greek, literally e psilon "bare -e-, -e- and nothing else," so called by late grammarians in contradistinction to the diphthong -ai-, which had come to have the same sound. Greek psilon "smooth, simple" is of uncertain origin (Watkins suggests PIE root *bhes- (1) "to rub").

n. 1 The name for the fifth letter of the Greek alphabet, ε or Ε, preceded by delta ('''Δ''', '''δ''') and followed by zeta ('''Ζ''', '''ζ'''). 2 (context phonetics English) In International Phonetic Alphabet, the phonetic symbol that represents the http://en.wikipedia.org/wiki/open-mid%20front%20unrounded%20vowel; represented in SAMPA as ''E''. 3 (context mathematics English) An arbitrarily small quantity. 4 (context computing colloquial English) A negligible effect.

n. the 5th letter of the Greek alphabet

Epsilon ( uppercase , lowercase or lunate ; ) is the fifth letter of the Greek alphabet, corresponding phonetically to a mid front unrounded vowel . In the system of Greek numerals it has the value five. It was derived from the Phoenician letter He . Letters that arose from epsilon include the Roman E, Ë and Ɛ, and Cyrillic Е, È, Ё, Є and Э.

The name of the letter was originally , but the name was changed to (e psilon "simple e") in the Middle Ages to distinguish the letter from the digraph , a former diphthong that had come to be pronounced the same as epsilon.

In essence, the uppercase form of epsilon looks identical to Latin E. The lowercase version has two typographical variants, both inherited from medieval Greek handwriting. One, the most common in modern typography and inherited from medieval minuscule, looks like a reversed "3". The other, also known as lunate or uncial epsilon and inherited from earlier uncial writing, looks like a semicircle crossed by a horizontal bar. While in normal typography these are just alternative font variants, they may have different meanings as mathematical symbols. Computer systems therefore offer distinct encodings for them. In Unicode, the character U+03F5 "Greek lunate epsilon symbol" (ϵ) is provided specifically for the lunate form. In TeX, \epsilon (ε ) denotes the lunate form, while \varepsilon (ɛ ) denotes the inverted-3 form.

There is also a Latin epsilon or "open e", which looks similar to the Greek lowercase epsilon. It is encoded in Unicode as U+025B ("Latin small-letter open e", ɛ) and U+0190 ("Latin capital-letter open e", Ɛ) and is used as an IPA phonetic symbol. The lunate or uncial epsilon has also provided inspiration for the euro sign (€).

The lunate epsilon (ϵ) is not to be confused with the set membership symbol (∈); nor should the Latin uppercase epsilon (Ɛ) be confused with the Greek uppercase sigma (Σ).

Epsilon is a programmer's text editor modelled after Emacs. It resembles Emacs not only in its default keybindings and layout, but also in the fact that it has a Turing-complete extension language in which much of its functionality is implemented. Unlike Emacs, Epsilon's extension language, EEL (Epsilon Extension Language) is a dialect of C rather than a dialect of Lisp. Epsilon runs on DOS, Microsoft Windows, Linux, FreeBSD, Mac OS X and OS/2.

Epsilon is a commercial product sold by Lugaru Software. It was first released in 1984, long before Emacs was available on personal computers, and modestly priced, so it provided an attractive alternative to the usual DOS editors for those accustomed to Emacs. It was also the first DOS based editor to allow editing of files that were larger than available RAM.

Epsilon supports Unicode but does not display characters outside the BMP and cannot presently handle right-to-left scripts. It can convert among dozens of character encodings.

Epsilon is an Indomalayan and Australasian genus of potter wasps.

EPSILON is a macro language with high level features including strings and lists, developed by A.P. Ershov at Novosibirsk in 1967. EPSILON was used to implement ALGOL 68 on the M-220 computer.

Epsilon (also titled Alien Visitor) is a 1995 science fiction film that was directed by Rolf de Heer. It features Ulli Birve and Syd Brisbane (and Aletha McGrath, but in the 1997 version only) . The extended version of the film runs for 92 minutes and was distributed by Miramax.

Epsilon is the fifth studio album by Finnish power metal band Dreamtale. Released on The Secret Door record label on 11 May 2011 in Finland, with an earlier 20 April 2011 release in Japan, it reached number 39 on Suomen virallinen lista, The Official Finnish Charts.

Epsilon is the fifth letter of the Greek alphabet.

Epsilon may also refer to:

The (formerly Advanced Solid Rocket) is a Japanese solid-fuel rocket designed to launch scientific satellites. It is a follow-on project to the larger and more expensive M-V rocket which was retired in 2006. The Japan Aerospace Exploration Agency (JAXA) began developing the Epsilon in 2007. It is designed to be capable of placing a 1.2 tonne payload into low Earth orbit.

Epsilon (stylized as εpsilon) is Blood Stain Child's fifth studio album and first release on Coroner Records/ Pony Canyon. It's also the first to feature vocalist Sophia and drummer Gami (after the departure of vocalist Sadew and drummer/founding-member Violator). All compositions—except "Electricity," which is composed by Aki—are by Ryu. This album was pre-sold during A-Kon from June 10 to 12, 2011. And, in this event, nine of the new songs (including the European bonus track, "Royal Sky") were performed. As of June 7, 2011, Pony Canyon released forty-four second samples of each song in the album; a full sample of "Sirius VI" debuted, through Internet radio, on May 26, 2011.