Thermodynamics
- Entropy (classical thermodynamics), the macroscopic approach to thermodynamic entropy
- Entropy (energy dispersal), a variant perspective on thermodynamic entropy
- Entropy (statistical thermodynamics), the microscopic approach to thermodynamic entropy
- Gibbs entropy, statistical entropy of a thermodynamic system
- Boltzmann entropy, an approximation to Gibbs entropy
- Tsallis entropy, a generalization of Boltzmann-Gibbs entropy
- von Neumann entropy, entropy of a quantum-mechanical system
- Entropy (order and disorder), entropy's association with the amount of order, disorder, and/or chaos in a thermodynamic system
- History of entropy, concept of entropy that functional energy released from combustion reactions is always lost to dissipation or friction
- Introduction to entropy
- Entropy and life, research concerning the relationship between the thermodynamic quantity entropy and the evolution of life
- Entropy (astrophysics), the adiabatic constant
- Entropy (arrow of time), thermodynamic arrow of time
Information theory and mathematics
- Entropy (information theory), a measure of the amount of information contained in a message
- Entropy encoding, data compression strategies to produce a code length equal to the entropy of a message
- Kolmogorov–Sinai entropy, the rate of information generation by a measure-preserving dynamical system
- Rényi entropy, a family of diversity measures used to define fractal dimensions
- Topological entropy, a measure of exponential growth in the number of distinguishable orbits of a dynamical system
- Volume entropy, a Riemannian invariant measuring the exponential rate of volume growth of a Riemannian metric
Computer science
- Entropy (computing), a discussion of entropy generation and API's in computer systems
- Entropy (package manager), a Sabayon Linux package manager
- Entropy (anonymous data store), a discontinued project to build a computer network designed to be resistant to censorship
Mathematics
- Kolmogorov-Sinai entropy, a mathematical type of entropy in dynamical systems related to measures of partitions
- Relative entropy (Kullback–Leibler divergence), is a natural distance measure from a "true" probability distribution P to an arbitrary probability distribution Q
- Rényi entropy, a generalized entropy measure for fractal systems
- Topological entropy, a way of defining entropy in an iterated function map in ergodic theory
- Volume entropy, a Riemannian invariant measuring the exponential rate of volume growth
References