HTML | Meaning | |
---|---|---|

ε |
`ε` `ε` `U+3B5` |
Epsilon Symbol (Lowercase)The lowercase epsilon symbol is often used in mathematics to represent an arbitrarily small positive number. |

Ε |
`Ε` `Ε` `U+395` |
Epsilon Symbol (Uppercase)The uppercase Epsilon is not as commonly used but may appear in various notations. |

δ |
`δ` `δ` `U+3B4` |
Delta SymbolFrequently used in calculus and analysis, often along with epsilon. |

∑ |
`∑` `∑` `U+2211` |
Sigma SymbolRepresents the sum of a series of terms in mathematics. |

∞ |
`∞` `∞` `U+221E` |
Infinity SymbolRepresents the concept of something being infinite or unbounded. |

### 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`

.