Stigma (letter) sigma form ς never occurs inside a word and is never used as a numeral either. Uppercase forms of stigma as a numeral (Ϛ) are rare in practice; when they occur, they can often be confused with uppercase forms of another numeral symbol, koppa (Ϟϟ), which stands for 90. Stigma is encoded in Unicode as "Greek letter stigma" U+03DA (Ϛ) and "Greek small letter stigma" U+03DB (ϛ). Stigma (letter) Stigma (ϛ) is a ligature of the Greek letters sigma (Σ) and tau (Τ), which was used in writing Greek between the Middle Ages and the 19th century. It is also
Letter of Peter to Philip discourse upon the nature of Christ. It was probably written in the late 2nd century or the beginning of the 3rd, originally in Greek, but translated into Coptic in the Nag Hammadi text. The title of the Letter is originally "The Letter of Peter Which He Sent to Philip", but is commonly simplified to "The Letter of Peter to Philip". Another copy of the letter has more recently been found in the Codex Tchacos and is titled plainly as "The Letter of Peter to Philip". The Nag Hammadi Library is a collection of thirteen codices that was found near the