Psi (letter) (generalized) positional states of a qubit in a quantum computer. Psi is also used as the symbol for the polygamma function, defined by where formula_3 is the gamma function. The letters Ψ or ψ can also be a symbol for: These characters are used only as mathematical symbols. Stylized Greek text should be encoded using the normal Greek letters, with markup and formatting to indicate text style. Psi (letter) Psi (; uppercase ', lowercase '; "psi" ) is the 23rd letter of the Greek alphabet and has a numeric value of 700. In both Classical and Modern Greek, the letter
History of the Greek alphabet whether they should be considered as siblings of the latter, adopted from the Phoenician simultaneously, or rather as early descendants of the nascent Greek alphabet proper. History of the Greek alphabet The history of the Greek alphabet starts with the adoption of Phoenician letter forms and continues to the present day. The Greek alphabet postdates Linear B, the syllabic script that was used for writing Mycenaean Greek, by several centuries. This article concentrates on the early period, before the codification of the now-standard Greek alphabet. The Phoenician alphabet was strictly speaking one that was consistently explicit only about consonants, though