Psi (letter)
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Psi (letter)
Psi (uppercase , lowercase ; ''psi'' ) is the 23rd letter of the Greek alphabet The Greek alphabet has been used to write the Greek language since the late ninth or early eighth century BC. It is derived from the earlier Phoenician alphabet, and was the first alphabetic script in history to have distinct letters for vowels ... and is associated with a numeric value of 700. In both Classical Classical may refer to: European antiquity *Classical antiquity, a period of history from roughly the 7th or 8th century B.C.E. to the 5th century C.E. centered on the Mediterranean Sea *Classical architecture, architecture derived from Greek and ... and Modern Greek Modern Greek (, , or , ''Kiní Neoellinikí Glóssa''), generally referred to by speakers simply as Greek (, ), refers collectively to the dialect The term dialect (from Latin , , from the Ancient Greek word , 'discourse', from , 'through' ..., the letter indicates the combination (as in English word " lap ...
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Psi (Cyrillic)
Psi (Ѱ, ѱ; italics: ''Ѱ ѱ'') is a letter in the early Cyrillic alphabet The Early Cyrillic alphabet, also called classical Cyrillic or paleo-Cyrillic, is a writing system A writing system is a method of visually representing verbal communication Communication (from Latin Latin (, or , ) is a class ..., derived from the Greek#REDIRECT Greek Greek may refer to: Greece Anything of, from, or related to Greece Greece ( el, Ελλάδα, , ), officially the Hellenic Republic, is a country located in Southeast Europe. Its population is approximately 10.7 million as of ... letter psi (Ψ, ψ). It represents the sound /ps/, as in English ''naps''. According to the school rules developed in the 16th and the 17th centuries, such as Meletius Smotrytsky Meletius Smotrytsky ( uk, Мелетій Смотрицький, translit=Meletiy Smotryts’kyy; be, Мялецій Сматрыцкі; russian: Мелетий Смотрицкий, translit=Meletiy S ...
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Paranormal
Paranormal events are purported phenomena described in popular culture Popular culture (also called mass culture or pop culture) is generally recognized by members of a society A society is a group A group is a number A number is a mathematical object used to counting, count, measurement, measure, and ..., folk Folk or Folks may refer to: Sociology *Nation *People * Folklore ** Folk art ** Folk dance ** Folk hero ** Folk music *** Folk metal *** Folk punk *** Folk rock *** British folk rock ** Folk religion * Folk taxonomy Arts, entertainment, and media ..., and other non-scientific bodies of knowledge, whose existence within these contexts is described as beyond the scope of normal scientific understanding. Notable paranormal beliefs include those that pertain to extrasensory perception Extrasensory perception or ESP, also called sixth sense, includes claimed reception of information not gained through the recognized physical sense A sense is a b ...
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Parapsychology
Parapsychology is the study of alleged psychic A psychic is a person who claims to use extrasensory perception Extrasensory perception or ESP, also called sixth sense, includes claimed reception of information not gained through the recognized physical sense A sense is a biologica ... phenomena (extrasensory perception Extrasensory perception or ESP, also called sixth sense, includes claimed reception of information not gained through the recognized physical sense A sense is a biological system A biological system is a complex biological network, network ..., telepathy Telepathy (from the Greek#REDIRECT Greek Greek may refer to: Greece Anything of, from, or related to Greece Greece ( el, Ελλάδα, , ), officially the Hellenic Republic, is a country located in Southeast Europe. Its population is ap ..., precognition Precognition (from the Latin Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch o ...
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Psychiatry
Psychiatry is the specialty (medicine), medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial psychiatric assessment of a person typically begins with a Medical history, case history and mental status examination. Physical examinations and Psychological testing, psychological tests may be conducted. On occasion, neuroimaging or other Neurophysiology, neurophysiological techniques are used. Mental disorders are often diagnosed in accordance with clinical concepts listed in diagnostic manuals such as the ''International Classification of Diseases'' (ICD), edited and used by the World Health Organization (WHO) and the widely used ''Diagnostic and Statistical Manual of Mental Disorders'' (DSM), published by the American Psychiatric Association (APA). The fifth edition of the DSM (DSM-5) was published in May 2013 which r ...
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Psychology
Psychology is the scientific Science () is a systematic enterprise that builds and organizes knowledge Knowledge is a familiarity or awareness, of someone or something, such as facts A fact is an occurrence in the real world. The usual test for a statement of fac ... study of mind The mind is the set of faculties responsible for mental phenomena A phenomenon (; plural phenomena) is an observable fact or event. The term came into its modern philosophical Philosophy (from , ) is the study of general and fund ... and behavior Behavior (American English American English (AmE, AE, AmEng, USEng, en-US), sometimes called United States English or U.S. English, is the set of varieties of the English language native to the United States. Currently, American English .... Psychology includes the study of conscious , an English Paracelsian Paracelsianism (also Paracelsism; German: ') was an early modern History of medicine, medical movem ...
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Gamma Function
In mathematics Mathematics (from Greek: ) includes the study of such topics as numbers (arithmetic and number theory), formulas and related structures (algebra), shapes and spaces in which they are contained (geometry), and quantities and their changes (cal ..., the gamma function (represented by , the capital letter gamma Gamma (uppercase , lowercase ; ''gámma'') is the third letter of the Greek alphabet. In the system of Greek numerals it has a value of 3. In Ancient Greek, the letter gamma represented a voiced velar stop . In Modern Greek, this letter rep ... from the Greek alphabet The Greek alphabet has been used to write the Greek language since the late ninth or early eighth century BC. It is derived from the earlier Phoenician alphabet, and was the first alphabetic script in history to have distinct letters for vowels ...) is one commonly used extension of the factorial function to complex number In mathematics, a complex number is an element o ...
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Polygamma Function
In mathematics Mathematics (from Greek: ) includes the study of such topics as numbers (arithmetic and number theory), formulas and related structures (algebra), shapes and spaces in which they are contained (geometry), and quantities and their changes (cal ..., the polygamma function of order is a meromorphic function In the mathematical field of complex analysis, a meromorphic function on an open subset ''D'' of the complex plane is a function (mathematics), function that is holomorphic function, holomorphic on all of ''D'' ''except'' for a set of isolated p ... on the complex numbers In mathematics Mathematics (from Ancient Greek, Greek: ) includes the study of such topics as quantity (number theory), mathematical structure, structure (algebra), space (geometry), and calculus, change (mathematical analysis, analysis). I ... \mathbb defined as the th derivative of the logarithm In mathematics, specifically in calculus and complex analysis, the logarithmic ...
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Quantum Computer
Quantum computing is a type of computation Computation is any type of calculation that includes both arithmetical and non-arithmetical steps and which follows a well-defined model (e.g. an algorithm). Mechanical or electronic devices (or, History of computing hardware, historically, peop ... that harnesses the collective properties of quantum In physics Physics is the natural science that studies matter, its Elementary particle, fundamental constituents, its Motion (physics), motion and behavior through Spacetime, space and time, and the related entities of energy and force. ... states, such as superposition, interference, and entanglement, to perform calculations. The devices that perform quantum computations are known as quantum computers. Though current quantum computers are too small to outperform usual (classical) computers for practical applications, they are believed to be capable of solving certain computational problem In theoretical computer science I ...
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Qubit
In quantum computing Quantum computing is a type of computation Computation is any type of calculation A calculation is a deliberate process that transforms one or more inputs into one or more results. The term is used in a variety of senses, from the very defini ..., a qubit () or quantum bit is the basic unit of quantum information Quantum information is the information of the quantum state, state of a quantum system. It is the basic entity of study in quantum information theory, and can be manipulated using quantum information processing techniques. Quantum information ref ...—the quantum version of the classic binary bit The bit is a basic unit of information in computing Computing is any goal-oriented activity requiring, benefiting from, or creating computing machinery. It includes the study and experimentation of algorithmic processes and development of both ... physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mech ...
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Bra–ket Notation
In quantum mechanics Quantum mechanics is a fundamental theory A theory is a reason, rational type of abstraction, abstract thinking about a phenomenon, or the results of such thinking. The process of contemplative and rational thinking is often associated with ..., bra–ket notation, or Dirac notation, is ubiquitous. The notation uses the angle bracket A bracket is either of two tall fore- or back-facing punctuation Punctuation (or sometimes interpunction) is the use of spacing, conventional signs (called punctuation marks), and certain typographical devices as aids to the understanding ...s, and , and a vertical bar The vertical bar, , is a glyph with various uses in mathematics, computing, and typography. It has many names, often related to particular meanings: Sheffer stroke (in mathematical logic, logic), pipe, vbar, stick, vertical line, bar, verti-bar ... , to construct "bras" and "kets" . A ket looks like ", v \rangle". Mathematically it denotes ...
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Schrödinger Equation
The Schrödinger equation is a linear Linearity is the property of a mathematical relationship (''function Function or functionality may refer to: Computing * Function key A function key is a key on a computer A computer is a machine that can be programmed to carry out se ... partial differential equation In mathematics Mathematics (from Ancient Greek, Greek: ) includes the study of such topics as quantity (number theory), mathematical structure, structure (algebra), space (geometry), and calculus, change (mathematical analysis, analysis). I ... that governs the wave function A wave function in quantum physics is a mathematical description of the quantum state of an isolated quantum system. The wave function is a complex number, complex-valued probability amplitude, and the probabilities for the possible results of ... of a quantum-mechanical system. It is a key result in quantum mechanics Quantum mechanics is a fundamental theory A theory ...
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