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 Arabic alphabet History of the Arabic alphabet The history of the Arabic alphabet concerns the origins and the evolution of the Arabic script. It is thought that the Arabic alphabet is a derivative of the Nabataean variation of the Aramaic alphabet, which descended from the Phoenician alphabet, which, among others, gave rise to the Hebrew alphabet and the Greek alphabet (and therefore the Cyrillic and Roman alphabets). The Arabic alphabet evolved either from the Nabataean, or (less widely believed) directly from the Syriac. This table shows changes undergone by the shapes of the letters from the Aramaic original to the Nabataean and