Category:Epsilon servers

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General information
Epsilon ( Ε, ε or  ϵ; έψιλον) is the fifth letter of the, corresponding phonetically to a  /e/. In the system of it has the value five. It was derived from the. Letters that arose from epsilon include the Roman and Cyrillic.

The name "epsilon" (ἒ ψιλόν, "simple e") was coined in the Middle Ages to distinguish the letter from the αι, a former  that had come to be pronounced the same as epsilon.

In essence, the uppercase form of epsilon looks identical to Latin E. The lowercase version has two typographical variants, both inherited from. One, the most common in modern typography and inherited from medieval minuscule, looks like a reversed "3". The other, also known as or uncial epsilon and inherited from earlier uncial writing, looks like a semicircle crossed by a horizontal bar. While in normal typography these are just alternative font variants, they may have different meanings as mathematical symbols. Computer systems therefore offer distinct encodings for them. In, the character U+03F5 "Greek lunate epsilon symbol" (ϵ) is provided specifically for the lunate form. In,  ($$\epsilon\!$$) denotes the lunate form, while   ($$\varepsilon\!$$) denotes the inverted-3 form.

There is also a or "open e", which looks similar to the Greek lowercase epsilon. It is encoded in Unicode as U+025B ("Latin small-letter open e", ɛ) and U+0190 ("Latin capital-letter open e", Ɛ) and is used as an phonetic symbol. The lunate or uncial epsilon has also provided inspiration for the (€).

The lunate epsilon (ϵ) is not to be confused with the symbol (∈); nor should the Latin uppercase epsilon (Ɛ) be confused with the Greek uppercase  (Σ).

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