Digamma - Computer Encoding

Computer Encoding

In Unicode, the sign for the numeral digamma/stigma is present in an uppercase and lowercase version, at U+03DA (Ϛ, "Greek letter stigma") and U+03DB (ϛ, "Greek small letter stigma") respectively. The uppercase letter was present in the standard from version 1.3 (1993), whereas the lowercase equivalent was only added in version 3.0 (1999). (Hence, while the uppercase character may show great differences in shape between different fonts, the lowercase character may be lacking in some older fonts.)

Alphabetic digamma (wau) is present as uppercase U+03DC (Ϝ) and lowercase U+03DD (ϝ). In July 2006, another pair of uppercase and lowercase digamma with bold typeface were added to the Unicode standard version 5.0, at code points U+1D7CA and U+1D7CB. Their intended use is as mathematical symbols, not regular text.

The И-shaped "Pamphylian digamma" was encoded in Unicode version 5.1 and has code U+0376 (uppercase) and U+0377 (lowercase) (Ͷ/ͷ ). The same codepoints are shared with the identical-looking but historically different Arcadian "Tsan". As of 2010, these new characters are not yet supported by most fonts. As these characters have no tradition of typographic representation in mixed-case modern print, new designs for the lowercase letter were created only for Unicode.

A clone of the numeral ϛ for use in Coptic has been encoded separately, since Unicode version 4.1, at U+2C8A ("Coptic capital letter sou", Ⲋ) and U+2C85 ("Coptic small letter sou", ⲋ). There are also codepoints for an F-shaped sign used as a musical notation symbol in ancient Greek vocal music (U+1D213, "Greek vocal notation symbol-20"), and for a small subscript ϛ-shaped symbol for use in Byzantine musical notation (U+1D0E8, "Byzantine musical symbol stigma").

In Beta code, alphabetic digamma is encoded as "V" (lowercase ϝ) and "*V" (uppercase Ϝ). The numeral sign ("stigma") is encoded as "#2" (lowercase ϛ) and "*#2" (uppercase Ϛ). An additional – now deprecated – code "#4" exists for the ambiguous sign, which can be a glyph variant either of koppa or of stigma. The F-shaped musical notation symbol is "#567", and the subscript stigma notation symbol is "#2232".

In the LaTeX typesetting system, the "Babel" package allows accessing digamma through the commands "\digamma" (ϝ), "\Digamma" (Ϝ), "\stigma" (ϛ), "\Stigma" (which produces the modern ligature CT glyph ), and "\varstigma" (which produces a variant of the S-shaped form).