![]() In Biblical studies, as an abbreviation for the book of Psalms. The ordinal collapsing function and notation developed by Wilfried Buchholz. In building, to represent an adjustment to a U-value, accounting for thermal bridge effects. In circadian physiology, ψ represents the phase relationship between a zeitgeber and a biological rhythm. In the computability theory, ψp(x) represents the return value Y of a program P. In virology the ψ site is a viral packaging signal. Indiana University (as a superimposed I and U).Ī sai, the name of which is pronounced the same way. One of the dihedral angles in the backbones of proteins. Stream function in fluid mechanics defining the curve to which the flow velocity is always tangent. In biochemistry, it denotes the rare nucleotide Pseudouridine. Water potential in movement of water between plant cells. In mathematics, the reciprocal Fibonacci constant, the division polynomials, and the supergolden ratio. Psychology, psychiatry, and sometimes parapsychology (involving paranormal or relating with the supernatural subjects, especially research into extrasensory perception). Psi is also used as the symbol for the polygamma function. It is also used to represent the (generalized) positional states of a qubit in a quantum computer. The letter psi is commonly used in physics to represent wave functions in quantum mechanics, such as in the Schrödinger equation and bra–ket notation. The uppercase (Ψ) & lowercase (ψ) Psi are used for: The classical Greek letter was adopted into the early Cyrillic alphabet as Ѱ. The Western letter (expressing /k h/, later /x/) was adopted into the Old Italic alphabets, and its shape is also continued into the Algiz rune of the Elder Futhark. There were early graphical variants that omitted the stem. In writing, the early letter appears in an angular shape. It appears in the 7th century BC, expressing /ps/ in the Eastern alphabets, but /k h/ in the Western alphabets (the sound expressed by Χ in the Eastern alphabets). It may or may not derive from the Phoenician alphabet. In both Classical and Modern Greek, the letter indicates the combination /ps/ (as in English word lapse).įor Greek loanwords in Latin and modern languages with Latin alphabets, psi is usually transliterated as ps. Psi logo 1010 1) Abbreviation on Greek tires 2) Abbreviation on tires 3) About 13, for NFL interiors 4) After chi 5) Air indicator 6) Air pressure fig 7). In the system of Greek numerals it has a numeric value of 700. Psi (Ψ, ψ) is the 23rd letter of the Greek alphabet. Psi (Ψ, ψ) Definition Psi (Ψ, ψ) Definition
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