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Constant Tourné
Constant or The Constant may refer to: Mathematics * Constant (mathematics), a non-varying value * Mathematical constant, a special number that arises naturally in mathematics, such as or Other concepts * Control variable or scientific constant, in experimentation the unchanging or constant variable * Physical constant, a physical quantity generally believed to be universal and unchanging * Constant (computer programming), a value that, unlike a variable, cannot be reassociated with a different value * Logical constant, a symbol in symbolic logic that has the same meaning in all models, such as the symbol "=" for "equals" People * Constant (given name) * Constant (surname) * John, Elector of Saxony (1468–1532), known as John the Constant * Constant Nieuwenhuys (1920-2005), better known as Constant Places * Constant, Barbados, a populated place Arts and entertainment * "The Constant", a 2008 episode of the television show ''Lost'' * ''The Constant'' (Story of the Year alb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constant (mathematics)
In mathematics, the word constant conveys multiple meanings. As an adjective, it refers to non-variance (i.e. unchanging with respect to some other value); as a noun, it has two different meanings: * A fixed and well-defined number or other non-changing mathematical object. The terms '' mathematical constant'' or '' physical constant'' are sometimes used to distinguish this meaning. * A function whose value remains unchanged (i.e., a constant function). Such a constant is commonly represented by a variable which does not depend on the main variable(s) in question. For example, a general quadratic function is commonly written as: :a x^2 + b x + c\, , where , and are constants (or parameters), and a variable—a placeholder for the argument of the function being studied. A more explicit way to denote this function is :x\mapsto a x^2 + b x + c \, , which makes the function-argument status of (and by extension the constancy of , and ) clear. In this example , and are co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematical Constant
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. Constants arise in many areas of mathematics, with constants such as and occurring in such diverse contexts as geometry, number theory, statistics, and calculus. What it means for a constant to arise "naturally", and what makes a constant "interesting", is ultimately a matter of taste, with some mathematical constants being notable more for historical reasons than for their intrinsic mathematical interest. The more popular constants have been studied throughout the ages and computed to many decimal places. All named mathematical constants are definable numbers, and usually are also computable numbers (Chaitin's constant being a significant exception). Basic mathematical constants These are constants which one is likely to encounter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E (mathematical Constant)
The number , also known as Euler's number, is a mathematical constant approximately equal to 2.71828 that can be characterized in many ways. It is the base of the natural logarithms. It is the limit of as approaches infinity, an expression that arises in the study of compound interest. It can also be calculated as the sum of the infinite series e = \sum\limits_^ \frac = 1 + \frac + \frac + \frac + \cdots. It is also the unique positive number such that the graph of the function has a slope of 1 at . The (natural) exponential function is the unique function that equals its own derivative and satisfies the equation ; hence one can also define as . The natural logarithm, or logarithm to base , is the inverse function to the natural exponential function. The natural logarithm of a number can be defined directly as the area under the curve between and , in which case is the value of for which this area equals one (see image). There are various other characteriz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Control Variable
A control variable (or scientific constant) in scientific experimentation is an experimental element which is constant (controlled) and unchanged throughout the course of the investigation. Control variables could strongly influence experimental results were they not held constant during the experiment in order to test the relative relationship of the dependent variable (DV) and independent variable (IV). The control variables themselves are not of primary interest to the experimenter. Usage A variable in an experiment which is held constant in order to assess the relationship between multiple variables, is a control variable.''control variable'' ; Business Dictionary online; retrieved September 2015 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Constant
A physical constant, sometimes fundamental physical constant or universal constant, is a physical quantity that is generally believed to be both universal in nature and have constant value in time. It is contrasted with a mathematical constant, which has a fixed numerical value, but does not directly involve any physical measurement. There are many physical constants in science, some of the most widely recognized being the speed of light in a vacuum ''c'', the gravitational constant ''G'', the Planck constant ''h'', the electric constant ''ε''0, and the elementary charge ''e''. Physical constants can take many dimensional forms: the speed of light signifies a maximum speed for any object and its dimension is length divided by time; while the fine-structure constant ''α'', which characterizes the strength of the electromagnetic interaction, is dimensionless. The term ''fundamental physical constant'' is sometimes used to refer to universal-but-dimensioned physical constants su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constant (computer Programming)
In computer programming, a constant is a value that should not be altered by the program during normal execution, i.e., the value is ''constant''. When associated with an identifier, a constant is said to be "named," although the terms "constant" and "named constant" are often used interchangeably. This is contrasted with a ''variable,'' which is an identifier with a value that can be changed during normal execution, i.e., the value is ''variable.'' Constants are useful for both programmers and compilers: For programmers they are a form of self-documenting code and allow reasoning about correctness, while for compilers they allow compile-time and run-time checks that verify that constancy assumptions are not violated, and allow or simplify some compiler optimizations. There are various specific realizations of the general notion of a constant, with subtle distinctions that are often overlooked. The most significant are: compile-time (statically valued) constants, run-time (dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logical Constant
In logic, a logical constant of a language \mathcal is a symbol that has the same semantic value under every interpretation of \mathcal. Two important types of logical constants are logical connectives and quantifiers. The equality predicate (usually written '=') is also treated as a logical constant in many systems of logic. One of the fundamental questions in the philosophy of logic is "What is a logical constant?"; that is, what special feature of certain constants makes them ''logical'' in nature? Some symbols that are commonly treated as logical constants are: Many of these logical constants are sometimes denoted by alternate symbols (''e.g.'', the use of the symbol "&" rather than "∧" to denote the logical and). Defining logical constants is a major part of the work of Gottlob Frege and Bertrand Russell. Russell returned to the subject of logical constants in the preface to the second edition (1937) of ''The Principles of Mathematics'' noting that logic becomes lingu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constant (given Name)
Constant is a given name, and may refer to: * André Henri Constant van Hasselt (1806–1874), Flemish poet * André Marie Constant Duméril (1774–1860), French zoologist * Constant Chevillon (1880–1944), Grand Master of the Freemasonry Rite of Memphis-Misraïm * Constant d'Aubigné (circa 1584–1647), French nobleman * Constant de Kerchove de Denterghem (1790–1865), Belgian liberal politician * Constant Feith (1884–1958), Dutch amateur football player * Constant Fornerod (1819–1899), Swiss politician * Constant Fouard (1837–1903), French ecclesiastical writer * Constant Huret (1870–1951), long distance track racing cyclist * Constant Janssen (1895–1970), Belgian physician and businessman * Constant Lambert (1905–1951), British composer and conductor * Constant Le Marchand de Lignery (1662–1732), French military officer * Constant Lestienne (born 1992), French tennis player * Constant Martin, inventor of the Clavioline * Constant Nieuwenhuys (1920–2005), Dutch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constant (surname)
Constant is a surname. Notable people with the surname include: *Benjamin Constant (1767–1830), Swiss-born thinker, writer and French politician *Benjamin Constant (Brazil) (1836–1891), Brazilian military man and political thinker *David Constant (born 1941), international cricket umpire * Edward Constant II (born c. 1942), American historian * Emmanuel Constant (bishop) (1928–2009), Roman Catholic Haitian bishop *Emmanuel Constant (born 1956), founder of FRAPH * F. Woodbridge Constant (1904–1988), American physicist *Jean-Joseph Benjamin-Constant, (1845 – 1902), French painter *Marius Constant (1925–2004), Romanian-born French composer *Paul-Henri-Benjamin d'Estournelles de Constant (1852–1924), French diplomat and politician *Pete Constant (born 1963), American politician * Kevin Constant (born 1987), Guinean footballer See also *Constance (name) *Constant (given name) * Constant-Désiré *Benjamin-Constant * Benoît-Constant *Saint-Constant (other) Saint-Con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John, Elector Of Saxony
Johann (30 June 146816 August 1532), known as Johann the Steadfast or Johann the Constant (''Johann, der Beständige''), was Prince-elector, Elector of Saxony from 1525 until 1532 from the Wettin (dynasty), House of Wettin. He is notable for organising the Lutheran Church in the Electorate of Saxony from a state and administrative level. In that, he was aided by Martin Luther, whose "Saxon model" of a Lutheran church was also soon to be implemented beyond Saxony, in other territories of the Holy Roman Empire. Luther turned to the Elector for secular leadership and funds on behalf of a church largely shorn of its assets and income after the break with Rome.Brecht, 2:260–63, 67; Mullett, 184–86. He played a part in the Protestation at Speyer. Biography Born in Meissen, John was the fifth of the seven children of Ernest, Elector of Saxony and Elisabeth of Bavaria, Electress of Saxony, Elisabeth of Bavaria. From 1486 onward he was the heir presumptive of his childless brother ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constant Nieuwenhuys
Constant Anton Nieuwenhuys (21 July 1920 – 1 August 2005), better known as Constant, was a Dutch painter, sculptor, graphic artist, author and musician. Early period Constant was born in Amsterdam on 21 July 1920 as the first son of Pieter Nieuwenhuijs and Maria Cornelissen. Their second son, Jan Nieuwenhuys, was born a year later. Both sons became artists although their parents had no apparent interest in art.Constant, une rétrospective, Musée Picasso Antibes, 2001 As a young child Constant drew passionately and showed great talent. He read literature with a special preference for poetry and played musical instruments. During his teenage years he learned to sing and to read music while in the church choir at the Ignatius Gymnasium, a prestigious Jesuit school in Amsterdam. In his later years, greatly inspired by gypsy music, he only played improvised music. He played guitar, violin and at 45 years of age also mastered playing the cimbalon.Trudy van der Horst, Constant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constant, Barbados
Constant is a populated place in the parish of Saint George, Barbados. See also * List of cities, towns and villages in Barbados This is a list of cities, towns and villages in Barbados. Barbados is a sovereign island country in the Lesser Antilles, in the Americas. It is in length and up to in width, covering an area of . It is situated in the western area of the Nort ... References Saint George, Barbados Populated places in Barbados {{Barbados-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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