List of types of equilibrium

[Biology]

• Equilibrioception, the sense of a balance present in human beings and animals
• Equilibrium unfolding, the process of unfolding a protein or RNA molecule by gradually changing its environment
• 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
• Equilibrium Theory, MacArthur-Wilson theory explaining biodiversity character of ecological islands
• Osmotic equilibrium, balance between solvent flow and pressure across a membrane

  [Physics]

• Equilibrant force, which keeps any object motionless and acts on virtually every object in the world that is not moving
• Equilibrium mode distribution, the state of fiber optic or waveguide transmission in which the propagation mode does not vary with distance along the fiber or changes in the launch mode
• 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
• Radiative equilibrium, the state where the energy radiated is balanced by the energy absorbed
• Secular equilibrium, a state of radioactive elements in which the production rate of a daughter nucleus is balanced by its own decay rate
• Thermodynamic equilibrium, the state of a thermodynamic system in which there are no net flows of matter or energy

  [Chemistry]

• Chemical equilibrium, the state in which the concentrations of the reactants and products have stopped changing in time
• Diffusive equilibrium, when the concentrations of each type of particle have stopped changing
• Thermal equilibrium, a state where an object and its surroundings cease to exchange energy in the form of heat, i.e. they are at the same temperature
• 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
• 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
• Vapor–liquid equilibrium, where the rates of condensation and vapourization of a material are equal

  [Economics]

• Competitive equilibrium, economic equilibrium when all buyers and sellers are small relative to the market
• Economic equilibrium, the situation in a system under examination where the economic forces of supply and demand are balanced
• Equilibrium price, the price at which quantity supplied equals quantity demanded
• General equilibrium theory, a branch of theoretical microeconomics that studies multiple individual markets
• Intertemporal equilibrium, an equilibrium concept over time
• Lindahl equilibrium, a method proposed by Erik Lindahl for financing public goods
• Partial equilibrium, the equilibrium price and quantity which come from the cross of supply and demand in a competitive market
• 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, the intersection of supply and demand in any market
• Sunspot equilibrium, an economic equilibrium in which non-fundamental factors affect prices or quantities
• Underemployment equilibrium, a situation in Keynesian economics with a persistent shortfall relative to full employment and potential output
• Dynamic stochastic general equilibrium, an econometric method that applies general equilibrium theory and microeconomic principles.

  [Mathematics]

• Correlated equilibrium, in game theory, a solution concept that is more general than Nash equilibrium
• Equilibrium point, in mathematics, a constant solution to a differential equation
• Nash equilibrium, the basic solution concept in game theory
• Quasi-perfect equilibrium, in game theory, a refinement of Nash Equilibrium for extensive form games
• Sequential equilibrium, in game theory, a refinement of Nash Equilibrium for games of incomplete information
• Perfect Bayesian equilibrium, in game theory, a refinement of Nash equilibrium for games of incomplete information, simpler than sequential equilibrium
• Symmetric equilibrium, in game theory, an equilibrium arising from all players using the same strategy
• Trembling hand perfect equilibrium, in game theory, an equilibrium arising from players that "slip up" and choose unintended strategies
• Proper equilibrium in game theory, an equilibrium, a subset of trembling hand, arising when players make costly trembles with lower probabilities

  Planetary sciences (including [geology])

• Hydrostatic equilibrium, the state of a system in which compression due to gravity is balanced by a pressure gradient force
• Isostatic equilibrium, in geology, the balance between gravitation and buoyancy of the Earth's crust in the mantle

  Other

• Social equilibrium, a system in which there is a dynamic working balance among its interdependent parts
• Equilibrium moisture content, the moisture content at which the wood is neither gaining nor losing moisture
• Reflective equilibrium, the state of balance or coherence among a set of beliefs arrived at by a process of deliberative mutual adjustment