Concepts

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

Ideas 3601–3750 of 5206.

Name	Kind	Subject
Lamé function	Concept	Special functions
Korteweg–De Vries equation	Concept	Partial differential equations
Algebraic independence	Concept	Field theory and polynomials
Algorithmic randomness	Concept	Mathematical logic and foundations
Ring of sets	Concept	Measure and integration
Dirichlet space	Concept	Functions of a complex variable
Exponential of a bounded operator	Concept	Operator theory
Frattini subgroup	Concept	Group theory and generalizations
Dedekind zeta function	Concept	Number theory
Face of a convex set	Concept	Convex and discrete geometry
Natural transformation	Concept	Category theory; homological algebra
Lasso	Concept	Statistics
Quillen equivalence	Concept	Category theory; homological algebra
Harmonic map	Concept	Global analysis, analysis on manifolds
Computable function	Concept	Mathematical logic and foundations
Perron integral	Concept	Real functions
Primitive ideal	Concept	Associative rings and algebras
Singular homology	Concept	Algebraic topology
Dbar operator	Concept	Several complex variables and analytic spaces
Dolbeault operator	Concept	Several complex variables and analytic spaces
Normalization	Concept	Algebraic geometry
Compact operator	Concept	Operator theory
Depth	Concept	Commutative algebra
Zeros of Bessel functions	Concept	Special functions
Green's function for the Laplacian	Concept	Potential theory
Traveling wave	Concept	Partial differential equations
Huntington's axioms	Concept	Order, lattices, ordered algebraic structures
Monoidal category	Concept	Category theory; homological algebra
Action-angle coordinates	Concept	Dynamical systems and ergodic theory
Nevanlinna class	Concept	Functions of a complex variable
Morita duality	Concept	Associative rings and algebras
Sobolev space	Concept	Functional analysis
Brun sieve	Concept	Number theory
Chebyshev set	Concept	Approximations and expansions
Ideal norm	Concept	Number theory
Local coefficient system	Concept	Algebraic topology
Final functor	Concept	Category theory; homological algebra
Almost split sequence	Concept	Associative rings and algebras
Vanishing cycle	Concept	Several complex variables and analytic spaces
Bessel polynomials	Concept	Special functions
Hölder summation	Concept	Sequences, series, summability
Matrix summability method	Concept	Sequences, series, summability
Tikhonov regularization	Concept	Operator theory
Projective line over a ring	Concept	Geometry
Analytical hierarchy	Concept	Mathematical logic and foundations
Cyclic polytope	Concept	Convex and discrete geometry
Character space	Concept	Functional analysis
Amalgamated free product	Concept	General algebraic systems
Ahlfors theory	Concept	Functions of a complex variable
Elliptic complex	Concept	Global analysis, analysis on manifolds
Opposite ring	Concept	Associative rings and algebras
Nonlinear potential theory	Concept	Potential theory
Analysis of variance	Concept	Statistics
Sylvester equation	Concept	Linear and multilinear algebra; matrix theory
Gabor frame	Concept	Harmonic analysis on Euclidean spaces
Grünwald–Letnikov derivative	Concept	Real functions
Cesàro means of Fourier series	Concept	Harmonic analysis on Euclidean spaces
Schläfli symbol	Concept	Geometry
Uniform convergence of series	Concept	Sequences, series, summability
First fundamental form	Concept	Differential geometry
Laplace transform on a convex cone	Concept	Integral transforms, operational calculus
Saddle-node bifurcation	Concept	Ordinary differential equations
Additive energy	Concept	Number theory
Lyapunov–Schmidt reduction	Concept	Operator theory
Morse index	Concept	Manifolds and cell complexes
Hamiltonian path	Concept	Combinatorics
Shift operator	Concept	Difference and functional equations
Rng	Concept	Associative rings and algebras
Weak convergence of measures	Concept	Probability theory and stochastic processes
Relational clone	Concept	General algebraic systems
Banach–Lie group	Concept	Topological groups, Lie groups
Discriminator variety	Concept	General algebraic systems
Finite geometry	Concept	Geometry
Harmonic map heat flow	Concept	Global analysis, analysis on manifolds
Local homeomorphism	Concept	General topology
Proper group action	Concept	General topology
Padé table	Concept	Approximations and expansions
Gelfand–Kirillov dimension	Concept	Associative rings and algebras
Cauchy's power equation	Concept	Difference and functional equations
Elementary class	Concept	Mathematical logic and foundations
Urysohn space	Concept	General topology
Group extension	Concept	Group theory and generalizations
Multicategory	Concept	Category theory; homological algebra
Volterra equations with completely monotone kernels	Concept	Integral equations
Gödel numbering	Concept	Mathematical logic and foundations
Regular variation	Concept	Real functions
Rarefaction wave	Concept	Partial differential equations
Difference set	Concept	Combinatorics
Binomial proportion confidence interval	Concept	Statistics
Space of bounded continuous functions	Concept	Functional analysis
Bernstein–Gelfand–Ponomarev reflection functors	Concept	Associative rings and algebras
Cauchy-type integral	Concept	Functions of a complex variable
Alexander–Spanier cohomology	Concept	Algebraic topology
Discrete valuation ring	Concept	Commutative algebra
Nondegenerate critical point	Concept	Manifolds and cell complexes
Dirichlet form	Concept	Potential theory
Simplex algorithm	Concept	Operations research, mathematical programming
Boltzmann equation	Concept	Partial differential equations
Surgery theory	Concept	Manifolds and cell complexes
Bochner integral	Concept	Measure and integration
Relational structure	Concept	General algebraic systems
Fourier–Motzkin elimination	Concept	Operations research, mathematical programming
Carlson symmetric forms	Concept	Special functions
Backward difference operator	Concept	Difference and functional equations
Kolmogorov quotient	Concept	General topology
Metropolis–Hastings algorithm	Concept	Numerical analysis
Inductive dimension	Concept	General topology
Unitary operator	Concept	Operator theory
Linear continuum	Concept	General topology
Tightness of measures	Concept	Probability theory and stochastic processes
Group algebra	Concept	Group theory and generalizations
Simpson's rule	Concept	Numerical analysis
Helmholtz equation	Concept	Partial differential equations
Percolation threshold	Concept	Probability theory and stochastic processes
Conservative system	Concept	Dynamical systems and ergodic theory
Hyperbolic set	Concept	Dynamical systems and ergodic theory
Autoregressive conditional heteroskedasticity	Concept	Statistics
Height of a poset	Concept	Order, lattices, ordered algebraic structures
Parallelohedron	Concept	Convex and discrete geometry
Projective dimension	Concept	Commutative algebra
Circumsphere	Concept	Geometry
Duality in order theory	Concept	Order, lattices, ordered algebraic structures
Lambert quadrilateral	Concept	Geometry
Parametric model	Concept	Statistics
Willmore flow	Concept	Differential geometry
Arity	Concept	General algebraic systems
Mittag-Leffler summation	Concept	Sequences, series, summability
Model theory of algebraically closed fields	Concept	Field theory and polynomials
Elliptic operator on a compact manifold	Concept	Global analysis, analysis on manifolds
Upwind scheme	Concept	Numerical analysis
Global analysis	Concept	Global analysis, analysis on manifolds
Algebraic space	Concept	Algebraic geometry
Complex powers of elliptic operators	Concept	Global analysis, analysis on manifolds
Model	Concept	Mathematical logic and foundations
Krull dimension	Concept	Commutative algebra
Center of a ring	Concept	Associative rings and algebras
Harmonic polynomial	Concept	Potential theory
Extended finite element method	Concept	Numerical analysis
Algebraic number field	Concept	Number theory
Suspension flow	Concept	Dynamical systems and ergodic theory
Dedekind eta function	Concept	Number theory
Anderson localization	Concept	Statistical mechanics, structure of matter
Dowker space	Concept	General topology
Siegel modular form	Concept	Number theory
Complex Monge–Ampère operator	Concept	Several complex variables and analytic spaces
Censoring	Concept	Statistics
Unit and counit	Concept	Category theory; homological algebra
Spectral method	Concept	Numerical analysis
Local ring	Concept	Commutative algebra
Analytic continuation in several variables	Concept	Several complex variables and analytic spaces