Equilibrium
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Equilibrium is the condition of a system in which competing influences are balanced and it may refer to:
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Mathematics
- The stationary point of a dynamical system is often called an equilibrium.
- In Game Theory a system is said to be in an equilibrium called a Nash equilibrium if there is no strategy which any of the components can improve their state in the system.
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Science
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Biology
- Equilibrioception, the sense of balance present in humans and animals
- Genetic equilibrium, theoretical state in which a population is not evolving
- Homeostasis, the ability of an open system, especially living organisms, to regulate its internal environment
- Punctuated equilibrium, theory in evolutionary biology
- Sedimentation equilibrium, analytical ultracentrifugation method for measuring protein molecular masses in solution
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Physics
- Equilibrium figures of Earth and planets (Physical geodesy)
- Equilibrium mode distribution, involves light traveling in an optical waveguide or fiber
- Hydrostatic equilibrium, the state of a system in which compression due to gravity is balanced by a pressure gradient force
- Hyperbolic equilibrium point, a mathematical concept in physics
- Mechanical equilibrium, the state in which the sum of the forces, and torque, on each particle of the system is zero
- Secular equilibrium, a state of radioactive elements in which the production rate of a daughter nucleus is balanced by its own decay rate
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Chemistry
- Chemical equilibrium, the state in which the concentrations of the reactants and products have no net change over time
- Diffusion equilibrium, when the concentrations of the diffusing substance in the two compartments are equal
- Donnan equilibrium, the distribution of ion species between two ionic solutions separated by a semipermeable membrane or boundary
- Dynamic equilibrium, the state in which two reversible processes occur at the same rate
- Equilibrium constant, a quantity characterizing a chemical equilibrium in a chemical reaction
- Equilibrium unfolding, the process of unfolding a protein or RNA molecule by gradually changing its environment
- Psychrometrics (Humidification/ Dehumidification Drying)
- Partition equilibrium, a type of chromatography that is typically used in GC
- Quasistatic equilibrium, the quasi-balanced state of a thermodynamic system near to equilibrium in some sense or degree
- Schlenk equilibrium, a chemical equilibrium named after its discoverer Wilhelm Schlenk taking place in solutions of Grignard reagents
- Solubility equilibrium, any chemical equilibrium between solid and dissolved states of a compound at saturation
- Thermodynamic equilibrium, the state of a thermodynamic system which is in thermal, mechanical, and chemical equilibrium
- Vapor-liquid equilibrium Distillation
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Economics
- Competitive equilibrium, economic equilibrium when all buyers and sellers are small relative to the market
- Economic equilibrium, a condition in economics
- Equilibrium price, the price at which supply equals demand
- General equilibrium, a branch of theoretical microeconomics
- Intertemporal equilibrium, an equilibrium concept over time
- Lindahl equilibrium, a method proposed by Erik Lindahl for financing public goods
- Partial equilibrium, one part of the general economic equilibrium
- Radner equilibrium, an economic concept defined by economist Roy Radner in the context of general equilibrium
- Recursive competitive equilibrium, an economic equilibrium concept associated with a dynamic program
- Static equilibrium (economics), the intersection of supply and demand in any market
- Sunspot equilibrium, an economic equilibrium in which nonfundamental factors affect prices or quantities
- Underemployment equilibrium, a situation in Keynesian economics with a persistent shortfall relative to full employment and potential output
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Game theory
- Correlated equilibrium, a solution concept in game theory that is more general than the well-known Nash equilibrium
- Nash equilibrium, a solution concept in game theory involving two or more players
- Quasi-perfect equilibrium, a refinement of Nash Equilibrium for extensive form games due to Eric van Damme
- Sequential equilibrium, a refinement of Nash Equilibrium for extensive form games due to David M. Kreps and Robert Wilson
- Symmetric equilibrium, in game theory, an equilibrium where all players use the same strategy
- Trembling hand perfect equilibrium assumes that the players, through a "slip of the hand" or tremble, may choose unintended strategies
- Proper equilibrium due to Roger B. Myerson, where costly trembles are made with smaller probabilities
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Music
- IX Equilibrium, the third LP by the black metal band Emperor
- Equilibrium, an album by Erik Mongrain
- Equilibrium, an album by sludge doom band Crowbar
- Equilibrium (band), a German Viking metal band
- Equilibrium (record label), a Portuguese record label
- Equilibrium, an album by Rome, Italy quintet 'The Gaia Corporation'
- Make Love and War, The Wedlock of Equilibrium, an album by Ordo Rosarius Equilibrio
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Other
- Equilibrium (company), videogame developer
- Equilibrium (2002 film), a science-fiction film
- "Equilibrium" (seaQuest 2032 episode), episode of seaQuest 2032
- "Equilibrium" (DS9 episode), an episode of Star Trek: Deep Space Nine
- Equilibrium moisture content, the moisture content at which the wood is neither gaining nor losing moisture
- Equilibrium point, node in mathematics
- Equilibrium (puzzle), a 3D interlocking type puzzle made of 6 half circle pieces
- Patterson equilibrium, a theory used in highway traffic modelling, air-traffic modelling, business modelling, and electrical grid operation
- Reflective equilibrium, the state of balance or coherence among a set of beliefs arrived at by a process of deliberative mutual adjustment
- Social equilibrium, a system in which there is a dynamic working balance among its interdependent parts
- Equilibration is the means of cognitive development in Jean Piaget's cognitive developmental theory.
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See also
- Balance
- Equilibristics, e.g. juggling
- Stability
- Steady state (disambiguation)
Unless indicated otherwise, the text in this article is either based on Wikipedia article "Equilibrium" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on research by Jahsonic and friends. See Art and Popular Culture's copyright notice.
