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4 definitions found
 for epsilon
From WordNet (r) 3.0 (2006) :

      n 1: the 5th letter of the Greek alphabet

From The Jargon File (version 4.4.7, 29 Dec 2003) :

      [see delta]
      1. n. A small quantity of anything. ?The cost is epsilon.?
      2. adj. Very small, negligible; less than marginal. ?We can get this
      feature for epsilon cost.?
      3. within epsilon of: close enough to be indistinguishable for all
      practical purposes, even closer than being within delta of. ?That's not
      what I asked for, but it's within epsilon of what I wanted.? Alternatively,
      it may mean not close enough, but very little is required to get it there:
      ?My program is within epsilon of working.?

From The Free On-line Dictionary of Computing (30 December 2018) :

      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.
     ["Application of the Machine-Oriented Language Epsilon to
     Software Development", I.V. Pottosin et al, in Machine
     Oriented Higher Level Languages, W. van der Poel, N-H 1974,
     pp. 417-434].
     [{Jargon File]

From The Free On-line Dictionary of Computing (30 December 2018) :

  within epsilon of
     1.  The fifth letter of the Greek alphabet.
     2.  (From the Hungarian mathematician Paul
     Erdos) A very small, insignificant, or negligible quantity of
     The use of epsilon is from the epsilon-delta method of
     proof in differential calculus.

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