Epsilon Symbol

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HTML Meaning
ε ε
Epsilon Symbol (Lowercase)
The lowercase epsilon symbol is often used in mathematics to represent an arbitrarily small positive number.
Epsilon Symbol (Uppercase)
The uppercase Epsilon is not as commonly used but may appear in various notations.

What is the Epsilon Symbol?

The Epsilon symbol, denoted as ε (lowercase) and Ε (uppercase), is a character in the Greek alphabet. It is extensively used in mathematics, particularly in calculus and real analysis, to represent an arbitrarily small positive number. While not as versatile as the Alpha symbol, the Epsilon symbol has specialized uses in various fields.

Original and Variations of the Epsilon Symbol

The Epsilon symbol has an original form as well as several variations. Below are these forms, presented in plain text for easy copying and pasting:

  • Original Symbols: ε, Ε
  • Variations: ϵ, 𝚬, 𝛆, 𝛦, 𝜀, 𝜠, 𝜺, 𝛜, 𝜖, 𝝐, 𝝚, 𝝴, 𝞔, 𝞮, 𝞊, 𝟄

Applications of the Epsilon Symbol in Various Fields

The Epsilon symbol (ε, Ε) has specialized relevance in several disciplines:

  • Mathematics: Commonly used to represent an arbitrarily small positive number, particularly in calculus and real analysis. The lowercase ε is most commonly used.
  • Computer Science: Represents the empty string in formal language theory. Here, the lowercase ε is used.
  • Engineering: Sometimes used to represent strain in materials. The lowercase ε is typically used.
  • Economics: Used in econometrics and statistical models to represent error terms. Usually, the lowercase ε is used.

How to Type the Epsilon Symbol Using Keyboard Shortcuts, Alt Codes, and LaTeX

  • Windows: Hold down the Alt key and type 238 (for lowercase) or 917 (for uppercase) on the numeric keypad, then release the Alt key.
  • Mac: For lowercase, you might need to use a special character menu or copy it from elsewhere. Uppercase is not commonly used.
  • Linux: Press Ctrl + Shift + u, then type 03b5 (for lowercase) or 0395 (for uppercase) and press Enter.
  • HTML: For lowercase use ε and for uppercase use Ε.
  • LaTeX: For lowercase, use the command \epsilon or \varepsilon. For uppercase, simply type E.

Symbols' Images

Epsilon Symbol (Lowercase)Epsilon Symbol (Uppercase)