Epsilon: Fifth letter of the Greek alphabet
Epsilon (uppercase/lowercase Ε ε), is the letter of the Greek alphabet, used to represent the e sound in Ancient and Modern Greek.
In the system of Greek numerals, it has a value of 5. Letters that came from it include the Roman E and Cyrillic Е. It is also used in calculus to represent a very small number (particularly in proofs involving limit). In set theory, a typographical variant of epsilon can be used to represent the statement "a is a member of set A" (symbolically ).
(A little fact: The Ypsilon is the only letter of the alphabet that you can divide into syllables: Y-psi-lon)
Related pages
- Delta
- Limit of a sequence, where epsilon is used
References
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