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Mathematical formula expressing equality
an equation is a mathematical formula that expresses the equality of two expressions, by connecting them with the equals sign =. The word equation and
Equation
8th episode of the 1st season of Fringe
"The Equation" is the eighth episode of the first season of the American science fiction drama television series Fringe. The episode follows the Fringe
The_Equation
Equation to derive time of sunset and sunrise
The sunrise equation or sunset equation can be used to derive the time of sunrise or sunset for any solar declination and latitude in terms of local solar
Sunrise_equation
Type of functional equation (mathematics)
mathematics, a differential equation is an equation that relates one or more unknown functions and their derivatives. In applications, the functions generally
Differential_equation
Equations describing classical electromagnetism
Maxwell's equations are a set of coupled partial differential equations that describe how electric and magnetic fields are generated by electric charges
Maxwell's_equations
Description of a quantum-mechanical system
The Schrödinger equation is a partial differential equation that governs the wave function of a non-relativistic quantum-mechanical system. Its discovery
Schrödinger_equation
mathematics, and in particular in the theory of solitons, the Dym equation (HD) is the third-order partial differential equation u t = u 3 u x x x . {\displaystyle
Dym_equation
Estimate of extraterrestrial civilizations
The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy
Drake_equation
Topics referred to by the same term
Characteristic equation may refer to: Characteristic equation (calculus), used to solve linear differential equations Characteristic equation, the equation obtained
Characteristic_equation
Second-order partial differential equation
differential equations. Laplace's equation is also a special case of the Helmholtz equation. The general theory of solutions to Laplace's equation is known
Laplace's_equation
Mathematical equation describing the motion of a rocket
The classical rocket equation, Tsiolkovsky rocket equation, or ideal rocket equation is a mathematical equation that describes the motion of vehicles that
Tsiolkovsky_rocket_equation
Böttcher's equation, named after Lucjan Böttcher, is the functional equation F ( h ( z ) ) = ( F ( z ) ) n {\displaystyle F(h(z))=(F(z))^{n}} where h
Böttcher's_equation
Empirical model for microorganisms growth limited by a nutrient
The Monod equation is a mathematical model for the growth of microorganisms. It is named for French biochemist Jacques Monod, who proposed using an equation
Monod_equation
In filtering theory the Kushner equation (after Harold Kushner) is an equation for the conditional probability density of the state of a stochastic non-linear
Kushner_equation
Elliptic partial differential equation
equation is an elliptic partial differential equation of broad utility in theoretical physics. For example, the solution to Poisson's equation is the
Poisson's_equation
Description of the time-evolution of plasma
In plasma physics, the Vlasov equation is a differential equation describing the time evolution of the distribution function of a collisionless plasma
Vlasov_equation
Necessary condition for optimality associated with dynamic programming
optimization problems, the analogous equation is a partial differential equation called the Hamilton–Jacobi–Bellman equation. In discrete time any multi-stage
Bellman_equation
Differential equation for the description of waves or standing wave
The wave equation is a second-order linear partial differential equation for the description of waves or standing wave fields such as mechanical waves
Wave_equation
Eigenvalue problem for the Laplace operator
mathematics, the Helmholtz equation is the eigenvalue problem for the Laplace operator. It corresponds to the elliptic partial differential equation: ∇ 2 f
Helmholtz_equation
Equation that does not involve powers or products of variables
In mathematics, a linear equation is an equation that may be put in the form a 1 x 1 + … + a n x n + b = 0 , {\displaystyle a_{1}x_{1}+\ldots +a_{n}x_{n}+b=0
Linear_equation
Type of Diophantine equation
Pell's equation, also called the Pell–Fermat equation, is any Diophantine equation of the form x 2 − n y 2 = 1 , {\displaystyle x^{2}-ny^{2}=1,} where
Pell's_equation
Saturation vapour pressure of water calculation
The Tetens equation is an equation to calculate the saturation vapour pressure of water over liquid and ice. It is named after its creator, O. Tetens
Tetens_equation
Relation between chemical reaction rate and concentrations of the reactants
the rate equation (also known as the rate law or empirical differential rate equation) is an empirical differential mathematical expression for the reaction
Rate_equation
The Inhour equation used in nuclear reactor kinetics to relate reactivity and the reactor period. Inhour is short for "inverse hour" and is defined as
Inhour_equation
Polynomial equation of degree two
In mathematics, a quadratic equation (from Latin quadratus 'square') is an equation that can be rearranged in standard form as a x 2 + b x + c = 0 , {\displaystyle
Quadratic_equation
Polynomial equation of degree 3
cubic equation in one variable is an equation of the form a x 3 + b x 2 + c x + d = 0 {\displaystyle ax^{3}+bx^{2}+cx+d=0} in which a is not zero. The solutions
Cubic_equation
Partial differential equation describing the evolution of temperature in a region
the heat equation is a parabolic partial differential equation. The theory of the heat equation was first developed by Joseph Fourier in 1822 for the
Heat_equation
probability, the Belavkin equation, also known as Belavkin-Schrödinger equation, quantum filtering equation, stochastic master equation, is a quantum
Belavkin_equation
graph theory, Graph equations are equations in which the unknowns are graphs. One of the central questions of graph theory concerns the notion of isomorphism
Graph_equation
Ruze's equation is an equation relating the gain of an antenna to the root mean square (RMS) of the antenna's random surface errors. The equation was originally
Ruze's_equation
Formula for temperature dependence of rates of chemical reactions
In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates. In 1889 while working with Wilhelm Ostwald
Arrhenius_equation
(1984), "Multi-vortex solutions of a two-dimensional nonlinear wave equation", Prog. Theor. Phys., 72 (1): 33–37, Bibcode:1984PThPh..72...33I, doi:10.1143/PTP
Ishimori_equation
Equation of statistical mechanics
The Boltzmann equation or Boltzmann transport equation (BTE) describes the statistical behaviour of a thermodynamic system not in a state of equilibrium;
Boltzmann_equation
Fundamental equation relating accounting quantities
The fundamental accounting equation, also called the balance sheet equation, is the foundation for the double-entry bookkeeping system and the cornerstone
Accounting_equation
Apparent solar time minus mean solar time
The equation of time describes the discrepancy between two kinds of solar time. The two times that differ are the apparent solar time, which directly
Equation_of_time
Partial differential equation
theory, the Fokker–Planck equation is a partial differential equation that describes the time evolution of the probability density function of the position
Fokker–Planck_equation
Physical law in electrochemistry
In electrochemistry, the Nernst equation is a chemical thermodynamical relationship that permits the calculation of the reduction potential of a reaction
Nernst_equation
Empirical adsorption isotherm
The Freundlich equation or Freundlich adsorption isotherm, an adsorption isotherm, is an empirical relationship between the quantity of a gas adsorbed
Freundlich_equation
Polynomial equation of degree 4
mathematics, a quartic equation is one which can be expressed as a quartic function equaling zero. The general form of a quartic equation is a x 4 + b x 3 +
Quartic_equation
Formula for the degree of polymerization
In step-growth polymerization, the Carothers equation (or Carothers' equation) gives the degree of polymerization, Xn, for a given fractional monomer
Carothers_equation
Stochastic differential equation
In physics, a Langevin equation (named after Paul Langevin) is a stochastic differential equation describing how a system evolves when subjected to a combination
Langevin_equation
Fourth-order PDE in continuum mechanics
In mathematics, the biharmonic equation is a fourth-order partial differential equation which arises in areas of continuum mechanics, including linear
Biharmonic_equation
Heuristic formula to explain determinants of behavior
Lewin's equation, B = f(P, E), is a heuristic formula proposed by psychologist Kurt Lewin as an explanation of what determines behavior. The formula states
Lewin's_equation
Topics referred to by the same term
up equation in Wiktionary, the free dictionary. An equation in mathematics is a formula stating that two expressions have the same value. Equation may
Equation_(disambiguation)
Differential equation containing derivatives with respect to only one variable
In mathematics, an ordinary differential equation (ODE) is a differential equation (DE) dependent on only a single independent variable. As with any other
Ordinary differential equation
Ordinary_differential_equation
Thought experiment about timing interstellar missions
The Wait Equation, also known as the Waiting Problem or the Relativistic Race Paradox, is a thought experiment in astronautics and theoretical futurology
The_Wait_Equation
Type of differential equation
mathematics, a Riccati equation in the narrowest sense is any first-order ordinary differential equation that is quadratic in the unknown function. In other
Riccati_equation
Relativistic wave description of fermions
In physics, the Majorana equation is a relativistic wave equation. It is named after the Italian physicist Ettore Majorana, who proposed it in 1937 as
Majorana_equation
Polynomial equation whose integer solutions are sought
Diophantine equation is a polynomial equation with integer coefficients, for which only integer solutions are of interest. A linear Diophantine equation equates
Diophantine_equation
Equations of motion for viscous fluids
The Navier–Stokes equations (/nævˈjeɪ ˈstoʊks/ nav-YAY STOHKS) describe the motion of viscous fluids. This system of partial differential equations was
Navier–Stokes_equations
Model used to describe wear
The Archard wear equation is a simple model used to describe sliding wear and is based on the theory of asperity contact. The Archard equation was developed
Archard_equation
2004 studio album by Ayreon
The Human Equation is the sixth album from the progressive rock project Ayreon by Dutch musician Arjen Anthony Lucassen, released on 25 May 2004 via Inside
The_Human_Equation
Polynomial equation, generally univariate
In mathematics, an algebraic equation or polynomial equation is an equation of the form P = 0 {\displaystyle P=0} , where P is a polynomial, usually with
Algebraic_equation
Equation in fluid dynamics
In fluid dynamics, the Darcy–Weisbach equation is an empirical equation that relates the head loss, or pressure loss, due to viscous shear forces along
Darcy–Weisbach_equation
Empirical relationship between refractive index and wavelength
The Sellmeier equation is an empirical relationship between refractive index and wavelength for a particular transparent medium. The equation is used
Sellmeier_equation
Non-linear partial differential equation encountered in problems of wave propagation
equation (from Greek εἰκών, image) is a non-linear first-order partial differential equation that is encountered in problems of wave propagation. The
Eikonal_equation
Relativistic quantum mechanical wave equation
In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928. In its free form, or including
Dirac_equation
Discontinuity in linear measurement
A milepost equation, milepoint equation, or postmile equation is a place where mileposts on a linear feature, such as a highway or rail line, fail to increase
Milepost_equation
Symbolic representation of a chemical reaction
A chemical equation is the symbolic representation (notation) of a chemical reaction in the form of symbols and chemical formulas. The reactant entities
Chemical_equation
Field-equations in general relativity
In the general theory of relativity, the Einstein field equations (EFE; also known as Einstein's equations) relate the geometry of spacetime to the distribution
Einstein_field_equations
Tanaka's equation is an example of a stochastic differential equation which admits a weak solution but has no strong solution. It is named after the Japanese
Tanaka_equation
System where changes of output are not proportional to changes of input
words, in a nonlinear system of equations, the equation(s) to be solved cannot be written as a linear combination of the unknown variables or functions
Nonlinear_system
Chemical kinetics equation
The Eyring equation (occasionally also known as Eyring–Polanyi equation) is an equation used in chemical kinetics to describe changes in the rate of a
Eyring_equation
Power loss in magnetic materials
Steinmetz's equation, sometimes called the power equation, is an empirical equation used to calculate the total power loss (core losses) per unit volume
Steinmetz's_equation
Chemistry concept
or molarity V2 = final volume .... The basic room purge equation is used in industrial hygiene. It determines the time required to reduce a known vapor
Dilution_(equation)
Type of differential equation
partial differential equation (PDE) is an equation which involves a multivariable function and one or more of its partial derivatives. The function is often
Partial_differential_equation
Theorem in probability theory
theory, Wald's equation, Wald's identity or Wald's lemma is an important identity that simplifies the calculation of the expected value of the sum of a random
Wald's_equation
Equation that describes density changes of a material that is diffusing in a medium
The diffusion equation is a parabolic partial differential equation. In physics, it describes the macroscopic behavior of many micro-particles in Brownian
Diffusion_equation
Thermodynamic equation
The Antoine equation is a class of semi-empirical correlations describing the relation between vapor pressure and temperature for pure substances. The
Antoine_equation
The Wannier equation describes a quantum mechanical eigenvalue problem in solids where an electron in a conduction band and an electronic vacancy (i.e
Wannier_equation
In Combustion, G equation is a scalar G ( x , t ) {\displaystyle G(\mathbf {x} ,t)} field equation which describes the instantaneous flame position, introduced
G_equation
Topics referred to by the same term
Logistic equation can refer to: Logistic function, a common S-shaped equation and curve with applications in a wide range of fields. Logistic map, a nonlinear
Logistic_equation
Free-energy relationship in organic chemistry
In organic chemistry, the Hammett equation describes a linear free-energy relationship relating reaction rates and equilibrium constants for many reactions
Hammett_equation
Equation whose unknown is a function
functional equation is, in the broadest meaning, an equation in which one or several functions appear as unknowns. So, differential equations and integral
Functional_equation
temperature. Another similar equation based on more recent data is the Arden Buck equation. This equation is named after the authors of the original scientific
Goff–Gratch_equation
Mathematical model in nuclear physics
physics, the Bateman equation is a mathematical model describing abundances and activities in a decay chain as a function of time, based on the decay rates
Bateman_equation
diagnostic equation (or diagnostic model) is an equation (or model) that links the values of these variables simultaneously, either because the equation (or
Diagnostic_equation
Calculation involving electrolyte solutions
above the range of validity of the Debye–Hückel equation. This equation, together with Specific ion interaction theory (SIT) and Pitzer equations is important
Bromley_equation
Models the mean time to failure of a semiconductor circuit due to electromigration
Black's equation is a mathematical model for the mean time to failure (MTTF) of a semiconductor circuit due to electromigration: a phenomenon of molecular
Black's_equation
Communication theory
The Media Equation is a general communication theory that claims people tend to assign human characteristics to computers and other media, and treat them
The_Media_Equation
Result in general relativity
relativity, the Raychaudhuri equation, or Landau–Raychaudhuri equation, is a fundamental result describing the motion of nearby bits of matter. The equation is
Raychaudhuri_equation
Equation from stability analysis
The Lyapunov equation, named after the Russian mathematician Aleksandr Lyapunov, is a matrix equation used in the stability analysis of linear dynamical
Lyapunov_equation
Orbital mechanics term
In orbital mechanics, Kepler's equation relates various geometric properties of the orbit of a body subject to a central force. It was derived by Johannes
Kepler's_equation
Representation of a curve by a function of a parameter
parametric equation expresses several quantities, such as the coordinates of a point, as functions of one or more variables called parameters. In the case of
Parametric_equation
Non-linear second order differential equation and its attractor
The Duffing equation (or Duffing oscillator), named after Georg Duffing (1861–1944), is a non-linear second-order differential equation used to model
Duffing_equation
Equation describing the penetration length of a liquid into a capillary tube with time
imbibition into porous materials. The equation is named after Edward Wight Washburn; also known as Lucas–Washburn equation, considering that Richard Lucas
Washburn's_equation
Finding values for variables that make an equation true
an equation is to find the solutions of an equation, which are the values (numbers, functions, sets, etc.) that fulfill the condition stated by the equation
Equation_solving
Topics referred to by the same term
An elliptic equation can mean: The equation of an ellipse An elliptic curve, describing the relationships between invariants of an ellipse A differential
Elliptic_equation
Fictional mind control formula in DC Comics
The Anti-Life Equation is a fictional concept appearing in American comic books published by DC Comics. Various comics have defined the equation in different
Anti-Life_Equation
Representation of water movement in unsaturated soils
The Richards equation represents the movement of water in unsaturated soils, and is attributed to Lorenzo A. Richards who published the equation in 1931
Richards_equation
In mathematics, the Ince equation, named for Edward Lindsay Ince, is the differential equation w ′ ′ + ξ sin ( 2 z ) w ′ + ( η − p ξ cos ( 2 z ) )
Ince_equation
The Edwards equation in organic chemistry is a two-parameter equation for correlating nucleophilic reactivity, as defined by relative rate constants,
Edwards_equation
Differential equation exhibiting high rate of dissipation
In computational mathematics, a stiff equation is an initial value problem u ˙ = f ( u ) , u ( 0 ) = u 0 , t ∈ [ 0 , T ] , {\displaystyle {\dot {u}}=f(u)\
Stiff_equation
Equation describing the transport of some quantity
A continuity equation or transport equation is an equation that describes the transport of some quantity. It is particularly simple and powerful when applied
Continuity_equation
In mathematics, the Fredholm integral equation is an integral equation whose solution gives rise to Fredholm theory, the study of Fredholm kernels and
Fredholm_integral_equation
Topics referred to by the same term
Hill equation may refer to Hill equation (biochemistry) Hill differential equation This disambiguation page lists articles associated with the title Hill
Hill_equation
In mathematics, the Bretherton equation is a nonlinear partial differential equation introduced by Francis Bretherton in 1964: u t t + u x x + u x x x
Bretherton_equation
Relation between friction factor and Reynolds number
The Ergun equation, derived by the Turkish chemical engineer Sabri Ergun in 1952, expresses the friction factor in a packed column as a function of the
Ergun_equation
Palierne equation connects the dynamic modulus of emulsions with the dynamic modulus of the two phases, size of the droplets and the interphase surface
Palierne_equation
Description of how a trait or gene changes in frequency over time
In the theory of evolution and natural selection, the Price equation (also known as Price's equation or Price's theorem) describes how a "characteristic"
Price_equation
THE EQUATION
THE EQUATION
Surname or Lastname
English
English : status name from Middle English thewe ‘thrall’, ‘slave’ (Old English þēow).
Male
Native American
Native American Navajo name TSE means "rock."
Male
English
Short form of English Theodore, THEO means "gift of God," and other names beginning with Theo-.
Surname or Lastname
English (mainly East Anglia)
English (mainly East Anglia) : topographic name for someone who lived by a common pasture, Middle English tye (Old English tēag).North German : from a short form, Tide, of the personal name Dietrich.
Girl/Female
Finnish, German, Greek
Gift of God
Female
Greek
 Short form of Greek and Latin Dorothea, THEA means "gift of God." Compare with another form of Thea.
Surname or Lastname
English (Yorkshire)
English (Yorkshire) : variant of Tye.
Female
Vietnamese
Vietnamese name THI means "poem."
Female
German
Pet form of German Kätharina, KÄTHE means "pure."
Boy/Male
Arthurian Legend American Hebrew Spanish
Arthur's brother.
Girl/Female
Hindu
Gift of God
Female
English
 Pet form of English Theodora, THEA means "gift of God." Compare with another form of Thea.
Male
English
English surname transferred to forename use, derived from the Middle English word tye, TYE means "pasture."
Female
Vietnamese
Vietnamese name THU means "autumn."
Boy/Male
English
From the enclosure.
Girl/Female
Greek
Untamed.
Boy/Male
Greek American German
God given.
Girl/Female
Greek American
Goddess; godly. Also as abbreviation of names like Althea and Dorothea. The mythological Thea was...
Boy/Male
Native American
Rock.
Girl/Female
Hindu, Indian, Malayalam, Modern, Tamil
Nil
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