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β (other)
The arrow symbol β may refer to: * The downward direction, a relative direction * The keyboard cursor control key, an arrow key * A downwards arrow, a Unicode arrow symbol * Logical NOR, operator which produces a result that is the negation of logical OR * An undefined object, in mathematical well-definition * A mathematical symbol for " approaching from above" * A comma category, in category theory * Down (game theory), a mathematical game * The ingressive sound, in phonetics * An APL function * "Decreased" (and similar meanings), in medical notation * The precipitation In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls from clouds due to gravitational pull. The main forms of precipitation include drizzle, rain, rain and snow mixed ("sleet" in Commonwe ... of an insoluble solid, in chemical notation See also * Down sign (other) * Arrow (other) ** β (other) ** β (disambiguatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrow (symbol)
An arrow is a graphical symbol, such as β, β or β, or a pictogram, used to point or indicate direction. In its simplest form, an arrow is a triangle, chevron, or concave kite, usually affixed to a line segment or rectangle, and in more complex forms a representation of an actual arrow (e.g. β΅ U+27B5). The direction indicated by an arrow is the one along the length of the line or rectangle toward the single pointed end. History An older (medieval) convention is the manicule (pointing hand, β). Pedro Reinel in c. 1505 first used the fleur-de-lis as indicating north in a compass rose; the convention of marking the eastern direction with a cross is older (medieval). Use of the arrow symbol does not appear to pre-date the 18th century. An early arrow symbol is found in an illustration of Bernard Forest de BΓ©lidor's treatise ''L'architecture hydraulique'', printed in France in 1737. The arrow is here used to illustrate the direction of the flow of water and of the wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
APL Syntax And Symbols
The programming language APL is distinctive in being ''symbolic'' rather than ''lexical'': its primitives are denoted by ''symbols'', not words. These symbols were originally devised as a mathematical notation to describe algorithms. APL programmers often assign informal names when discussing functions and operators (for example, "product" for Γ/) but the core functions and operators provided by the language are denoted by non-textual symbols. Monadic and dyadic functions Most symbols denote ''functions'' or ''operators''. A ''monadic'' function takes as its argument the result of evaluating everything to its right. (Moderated in the usual way by parentheses.) A ''dyadic'' function has another argument, the first item of data on its left. Many symbols denote both monadic and dyadic functions, interpreted according to use. For example, β3.2 gives 3, the largest integer not above the argument, and 3β2 gives 2, the lower of the two arguments. Functions and operators APL uses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
β (other)
β or -> may refer to: * one of the arrow symbols, characters of Unicode * one of the arrow keys, on a keyboard * β, ->, representing the assignment operator in various programming languages * ->, a pointer operator in C and C++ where a->b is synonymous with (*a).b (except when either -> or * has been overridden in C++). * β, goto in the APL programming language * β, representing the direction of a chemical reaction in a chemical equation * β, representing the set of all mathematical functions that map from one set to another in set theory * β, representing a material implication in logic * β, representing morphism in category theory * β, representing a vector in physics and mathematics * the relative direction In geometry, direction, also known as spatial direction or vector direction, is the common characteristic of all ray (geometry), rays which coincide when translation (geometry), translated to share a common endpoint; equivalently, it is the commo ... o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
β (other)
The symbol β, an upward pointing arrow, also called up arrow, uparrow, or upwards arrow, may refer to: Notation * β, a mathematical symbol for "undefined" * β, a mathematical symbol for " approaching from below" * β, a notation of Knuth's up-arrow notation for very large integers * β, a mathematical game theory position ''Up'' * β or Sheffer stroke, the logical connective "not both" or NAND * β, the APL function 'take' * "Increased" (and similar meanings), in medical notation * β, a chemical symbol for production of gas, which bubbles up. Character representations * β, upwards arrow, a Unicode arrow symbol * β, ↑, a HTML or XML character entity * β, codepoint 8A (hex) in EBCDIC Code page 293, used for writing APL * β, the glyph for character 94 (decimal) in ASCII until 1967, when it was replaced by the caret (^). See also * κ, an archaic Romanian Cyrillic letter * Arrow keys, on computer keyboards * Arrow (other) ** β (disambi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arrow (other)
An arrow is a projectile launched from a bow. Arrow or Arrows may also refer to: Symbols * Arrow (symbol) ** β (other) ** β (other) ** β (other) ** β (other) Places * Arrow, Kentucky * Arrow, Warwickshire, England * Arrow River (New Zealand) * River Arrow, Wales * River Arrow, Worcestershire, England People * Arrow (musician) (1949β2010), calypso and soca musician * Arrows Fitz (born 1989), American model, vlogger, television personality, and film producer * Gilbert John Arrow (1873β1948), English entomologist * Kenneth Arrow (1921β2017), American economist, joint winner of the 1972 Nobel Prize in Economics Arts, entertainment, and media Fictional entities * Arrow (comics), a superhero character, first appearing in 1938 * The Arrow, a fictional location, the first Dharma Initiative station in the television series '' Lost'' *Arrow, a character from '' Rudolph the Red-Nosed Reindeer: The Movie''. Music Groups ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Down Sign (other) , signals coming down from a satellite, spacecraft, or airc ...
Down Sign may refer to: *A Nigerian-based design studio specializing in graphic design, motion graphics, illustration, printing, and more. *A generic symbol for downloading, receiving data from a remote system *One of the arrow keys on a computer keyboard *Thumbs-down, a thumb signal *β, the symbol for Logical NOR *β, down in Combinatorial game theory See also * Down (other) *Sign (other) *β (other) *Sign, an object, quality, or event whose presence or occurrence indicates the presence or occurrence of something else *Relative direction, a downward direction * Downgrade, reverting software (or hardware) back to an older version *Downlink In a telecommunications network, a link is a communication channel that connects two or more devices for the purpose of data transmission. The link may be a dedicated physical link or a virtual circuit that uses one or more physical links or shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Equation
A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and chemical formulas. The reactant entities are given on the left-hand side and the Product (chemistry), product entities are on the right-hand side with a plus sign between the entities in both the reactants and the products, and an arrow that points towards the products to show the direction of the reaction. The chemical formulas may be symbolic, structural formula, structural (pictorial diagrams), or intermixed. The coefficients next to the symbols and formulas of entities are the absolute values of the Chemical equation#Structure, stoichiometric numbers. The first chemical equation was diagrammed by Jean Beguin in 1615. Structure A chemical equation (see an example below) consists of a list of reactants (the starting substances) on the left-hand side, an arrow (symbol), arrow symbol, and a list of products (substances formed in the chemical reaction) on the right-hand side. Each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precipitation (chemistry)
In an aqueous solution, precipitation is the "sedimentation of a solid material (a precipitate) from a liquid solution". The solid formed is called the precipitate. In case of an inorganic chemical reaction leading to precipitation, the chemical reagent causing the solid to form is called the precipitant. The clear liquid remaining above the precipitated or the centrifuged solid phase is also called the supernate or supernatant. The notion of precipitation can also be extended to other domains of chemistry (organic chemistry and biochemistry) and even be applied to the solid phases (e.g. metallurgy and alloys) when solid impurities segregation (materials science), segregate from a solid phase. Supersaturation The precipitation of a compound may occur when its concentration exceeds its solubility. This can be due to temperature changes, solvent evaporation, or by mixing solvents. Precipitation occurs more rapidly from a strongly supersaturated solution. The formation of a pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Medical Abbreviations
Abbreviations are used very frequently in medicine. They boost efficiency as long as they are used intelligently. The advantages of brevity should be weighed against the possibilities of obfuscation (making the communication harder for others to understand) and ambiguity (having more than one possible interpretation). Certain medical abbreviations are avoided to prevent mistakes, according to best practices (and in some cases regulatory requirements); these are flagged in the list of abbreviations used in medical prescriptions. Orthographic styling Periods (stops) Periods (stops) are often used in styling abbreviations. Prevalent practice in medicine today is often to forgo them as unnecessary. * Example: ** ''Less common:'' The diagnosis was ''C.O.P.D.'' hronic obstructive pulmonary disease** ''More common:'' The diagnosis was ''COPD'' Plurals The prevalent way to represent plurals for medical acronyms and initialisms is simply to affix a lower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ingressive Sound
In phonetics, ingressive sounds are sounds by which the airstream flows inward through the mouth or nose. The three types of ingressive sounds are lingual ingressive or velaric ingressive (from the tongue and the velum), glottalic ingressive (from the glottis), and pulmonic ingressive (from the lungs). The opposite of an ingressive sound is an egressive sound, by which the air stream is created by pushing air out through the mouth or nose. The majority of sounds in most languages, such as /b/, are both pulmonic and egressive. Lingual ingressive Lingual ingressive, or velaric ingressive, describes an airstream mechanism in which a sound is produced by closing the vocal tract at two places of articulation in the mouth. This rarefies the air in the enclosed space by lowering the tongue and then releasing both closures. Such sounds are called " clicks". Glottalic ingressive Glottal ingressive is the term generally applied to the implosive consonants, which actually use a mixed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relative Direction
In geometry, direction, also known as spatial direction or vector direction, is the common characteristic of all ray (geometry), rays which coincide when translation (geometry), translated to share a common endpoint; equivalently, it is the common characteristic of vector (geometry), vectors (such as the relative position between a pair of points) which can be made equal by scaling (geometry), scaling (by some positive scalar multiplication, scalar multiplier). Two vectors sharing the same direction are said to be ''codirectional'' or ''equidirectional''. All codirectional line segments sharing the same size (length) are said to be ''equipollent (geometry), equipollent''. Two equipollent segments are not necessarily coincident; for example, a given direction can be evaluated at different starting Position (geometry), positions, defining different unit directed line segments (as a bound vector instead of a free vector). A direction is often represented as a unit vector, the res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combinatorial Game Theory
Combinatorial game theory is a branch of mathematics and theoretical computer science that typically studies sequential games with perfect information. Research in this field has primarily focused on two-player games in which a ''position'' evolves through alternating ''moves'', each governed by well-defined rules, with the aim of achieving a specific winning condition. Unlike game theory, economic game theory, combinatorial game theory generally avoids the study of games of chance or games involving imperfect information, preferring instead games in which the current state and the full set of available moves are always known to both players. However, as mathematical techniques develop, the scope of analyzable games expands, and the boundaries of the field continue to evolve. Authors typically define the term "game" at the outset of academic papers, with definitions tailored to the specific game under analysis rather than reflecting the fieldβs full scope. Combinatorics, Comb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
