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For the 2005 hurricane, see Hurricane Epsilon .




"E psilon" ("simple e") was coined to distinguish the letter from αι, which by the medieval period was pronounced the same way.


SYMBOL


The upper-case Epsilon is not a very often used symbol outside of the Greek language because of its similarity to the Roman letter E .

The lower-case letter ε is used as the symbol for:
  • In mathematics (particularly Calculus ), a small positive quantity, usually denoted ε; see Limit .

  • --- By analogy with this, the late mathematician Paul Erdős also used the term "epsilons" to refer to children ( Hoffman 1998, p. 4).

  • In Set Theory , the Limit Ordinal of the sequence \omega,\omega^{\omega},\omega^{\omega^{\omega}},\dots.

  • In computing, the Precision of a numeric data type.

  • In Computer Science , the Empty String , though different writers use a variety of other symbols for the empty string as well, including the lower case Greek leter Lambda .

  • In mathematics, the Levi-Civita Symbol .

  • In mathematics, Set membership (often written ∈ instead of ε).

  • In physics, the Permittivity of a medium.

  • In Automata Theory , a transition that involves no shifting of an input symbol.

  • In Astronomy , the fifth brightest (usually) star in a Constellation . ''See'' Bayer Designation .

  • In phonetics, the open or lax mid-front Vowel , as in the English word "pet" (/pεt/)



Commerce



Fictional names

  • ''Epsilon in Malaysian Pale'' is the name of the second solo album released by Tangerine Dream leader Edgar Froese in 1975 .

  • Epsilon is also an Australian light-powered female-looking Robot that fought Pluto in an episode of Astro Boy .

  • ''Epsilon Eridani III'' is the planet that the spacestation Babylon 5 orbited in the eponymous Sci-fi television series.

  • E-104 Epsilon is also the name of a robot in Sonic Adventure .

  • Epsilon Semi-Moron is the lowest and least intelligent caste in Aldous Huxley's dystopic satire Brave New World .

  • In Greek it is used for Epsilon Team .

  • Epsilon is the main character in the John J. Rust superhero novel "Epsilon."

  • "Epsilon Mirror" is the name of one of Aika's moves in the video game Skies Of Arcadia .


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