Concepts

A mathematical idea. It can have more than one definition.

Ideas 8251–8378 of 8378.

Name	Kind	Subject
Harmonic majorant	Concept	Potential theory
Iterative conception of set	Concept
Permutation group	Concept	Group theory and generalizations
Integral equation of the first kind	Concept	Integral equations
Barrelled space	Concept	Functional analysis
Fundamental class	Concept	Manifolds and cell complexes
Direct predecessor	Concept
Join	Concept	General topology
Variogram	Concept	Statistics
Δ-complex	Concept	Algebraic topology
Black–Scholes equation	Concept	Partial differential equations
Normed field	Concept	Field theory and polynomials
Hicksian demand function	Concept	Game theory, economics, finance, and other social and behavioral sciences
Priestley space	Concept	Order, lattices, ordered algebraic structures
Soret effect	Concept	Classical thermodynamics, heat transfer
Plate reconstruction	Concept	Geophysics
Markov chain Monte Carlo	Concept	Numerical analysis
Counterfactual logic	Concept
Deligne–Lusztig theory	Concept	Group theory and generalizations
Oscillation theory	Concept	Ordinary differential equations
Syndrome decoding	Concept	Information and communication theory, circuits
Ciphertext indistinguishability	Concept	Information and communication theory, circuits
Relative homotopy group	Concept	Algebraic topology
Hyperelastic material	Concept	Mechanics of deformable solids
Pesin theory	Concept	Dynamical systems and ergodic theory
Transonic small disturbance equation	Concept	Fluid mechanics
Join-irreducible element	Concept	Order, lattices, ordered algebraic structures
Scalar curvature	Concept	Differential geometry
Domain of finite type	Concept	Several complex variables and analytic spaces
Quasigroup	Concept	Group theory and generalizations
Inviscid flow	Concept	Fluid mechanics
Banach–Mazur distance	Concept	Functional analysis
Concave up and concave down	Concept	Real functions
Generalized Boolean algebra	Concept	Order, lattices, ordered algebraic structures
Weber number	Concept	Fluid mechanics
Continuous kernel	Concept	Integral equations
Functional differential equation	Concept	Ordinary differential equations
Bridgeless	Concept
Laser rate equations	Concept	Optics, electromagnetic theory
Implicational propositional calculus	Concept
Nest algebra	Concept	Operator theory
Representative elementary volume	Concept	Mechanics of deformable solids
Zonoid	Concept	Convex and discrete geometry
Fictitious force	Concept	Mechanics of particles and systems
Discrete Laplace operator	Concept	Difference and functional equations
Doob's h-transform	Concept	Probability theory and stochastic processes
Moment tensor	Concept	Geophysics
Hartmann number	Concept	Fluid mechanics
Sample mean and sample covariance	Concept	Statistics
Uniform algebra	Concept	Functional analysis
Subtyping	Concept	Computer science
Stochastic approximation	Concept	Statistics
Control system	Concept	Systems theory; control
Waldhausen S-construction	Concept	Category theory; homological algebra
Bra–ket notation	Concept	Quantum theory
Generalized method of moments	Concept	Statistics
Conjugate points	Concept	Differential geometry
Lapse rate	Concept	Geophysics
Enumerative geometry	Concept	Algebraic geometry
WKB approximation in optics	Concept	Optics, electromagnetic theory
Quantum inverse scattering method	Concept	Quantum theory
Jacobian variety	Concept	Algebraic geometry
Progenerator	Concept	Associative rings and algebras
Fourier multiplier	Concept	Harmonic analysis on Euclidean spaces
Hardy–Littlewood circle method	Concept	Number theory
Donaldson theory	Concept	Manifolds and cell complexes
Legendre transformation	Concept	Real functions
Locally compact abelian group	Concept	Topological groups, Lie groups
Geomagnetic reversal	Concept	Geophysics
Scott topology	Concept	Order, lattices, ordered algebraic structures
Semiperfect ring	Concept	Associative rings and algebras
π	Concept
Mirror descent	Concept	Operations research, mathematical programming
Exclusion negation	Concept
Source	Concept
Ideal MHD equations	Concept	Fluid mechanics
Schechter luminosity function	Concept	Astronomy and astrophysics
Bogoliubov theory of the weakly interacting Bose gas	Concept	Statistical mechanics, structure of matter
Hodge structure	Concept	Algebraic geometry
Debye length	Concept	Statistical mechanics, structure of matter
Flow network	Concept	Operations research, mathematical programming
Method of images	Concept	Potential theory
Universal class	Concept	Mathematical logic and foundations
Maximal subfield	Concept	Associative rings and algebras
Lefschetz number	Concept	Algebraic topology
L-infinity space	Concept	Functional analysis
K-theory	Concept	K-theory
Weak gravitational lensing	Concept	Astronomy and astrophysics
Complemented lattice	Concept	Order, lattices, ordered algebraic structures
Absolute continuity	Concept	Real functions
Projective space	Concept	Algebraic geometry
Brown–Douglas–Fillmore theory	Concept	K-theory
Contact geometry of thermodynamics	Concept	Classical thermodynamics, heat transfer
Proper equilibrium	Concept	Game theory, economics, finance, and other social and behavioral sciences
Stone space	Concept	Order, lattices, ordered algebraic structures
Kernel density estimation	Concept	Statistics
Topology generated by a family of seminorms	Concept	Functional analysis
Arnold diffusion	Concept	Dynamical systems and ergodic theory
Kodaira dimension	Concept	Algebraic geometry
Kleene star	Concept	Computer science
Langevin equation	Concept	Probability theory and stochastic processes
Injective resolution	Concept	Category theory; homological algebra
Sigma-compact space	Concept	General topology
Regular and singular points of an analytic set	Concept	Several complex variables and analytic spaces
Statistical convergence	Concept	Sequences, series, summability
Entanglement distillation	Concept	Quantum theory
Streamlines, streaklines and pathlines	Concept	Fluid mechanics
Maxwell stress tensor	Concept	Optics, electromagnetic theory
Quaternion algebra	Concept	Associative rings and algebras
Dynamic similarity	Concept	Fluid mechanics
f(R) gravity	Concept	Relativity and gravitational theory
Disjoint union topology	Concept	General topology
Theil index	Concept	Game theory, economics, finance, and other social and behavioral sciences
Reduced scheme	Concept	Algebraic geometry
Divisible group	Concept	Group theory and generalizations
Riemann solver	Concept	Numerical analysis
Riesz basis	Concept	Harmonic analysis on Euclidean spaces
Biot number	Concept	Classical thermodynamics, heat transfer
Invariant mean	Concept	Abstract harmonic analysis
Degree of exactness of a quadrature rule	Concept	Numerical analysis
Pariah groups	Concept	Group theory and generalizations
hp-FEM	Concept	Numerical analysis
Branch and bound	Concept	Operations research, mathematical programming
Teichmüller space	Concept	Functions of a complex variable
Higher-order vagueness	Concept
Bramble (graph theory)	Concept
Continuous multiplication	Concept	Topological groups, Lie groups
Obstruction theory	Concept	Algebraic topology