Greek Letter Epsilon (Έψιλον - Ε)

Epsilon

Psilo means "little", therefore epsilon is "little E" or "short E". The letter began in Semitic as "heh", for the "H" sound, or rough aspirate. Their alphabet did not have a letter for this vowel (or most others), so the Greeks used it instead for the short "e" sound, and used a reverse apostrophe to indicate the "h" sound, which in Greek occurs only at the beginnings of words.

"Ε" Letter in mathematics and in science

ε represents:

  • a small positive quantity; see limit
  • a random error in regression analysis
  • in set theory, the limit ordinal of the sequence.
  • in computer science, the empty string.
  • the Levi-Civita symbol.
  • in electromagnetics, dielectric permittivity.
  • emissivity
  • strain

Greek words with "ε"

ελευθερία, εδώ

See Also:

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