Concepts

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

Ideas 2401–2550 of 2778.

Name	Kind	Subject
Saturated model	Concept	Mathematical logic and foundations
Character of a representation	Concept	Group theory and generalizations
Bartle–Dunford–Schwartz integral	Concept	Functional analysis
Semicontinuity	Concept	General topology
Euler characteristic	Concept	Algebraic topology
Strictly singular operator	Concept	Operator theory
Henselian ring	Concept	Commutative algebra
Orbifold	Concept	Manifolds and cell complexes
Constant-mean-curvature surface	Concept	Differential geometry
Dodgson condensation	Concept	Linear and multilinear algebra; matrix theory
Injective tensor product	Concept	Functional analysis
Stiff equation	Concept	Numerical analysis
Normal coordinates	Concept	Differential geometry
Spin structure	Concept	Differential geometry
Set theory	Concept	Mathematical logic and foundations
Natural density	Concept	Number theory
Embedded prime	Concept	Commutative algebra
Infinite Galois theory	Concept	Field theory and polynomials
Singular simplicial set	Concept	Algebraic topology
Regulator of a number field	Concept	Number theory
Church–Turing thesis	Concept	Mathematical logic and foundations
Random ordinary differential equation	Concept	Ordinary differential equations
Abel–Poisson summation of Fourier series	Concept	Harmonic analysis on Euclidean spaces
Fundamental group	Concept	Algebraic topology
Minimal prime ideal	Concept	Commutative algebra
Countably compact space	Concept	General topology
Torsion of a curve	Concept	Differential geometry
Radical ideal	Concept	Commutative algebra
Quasiconvex function	Concept	Real functions
Hecke operator	Concept	Number theory
Green's relations	Concept	Group theory and generalizations
Brown–Peterson cohomology	Concept	Algebraic topology
Persistent homology	Concept	Algebraic topology
Prime model	Concept	Mathematical logic and foundations
Kleene's T predicate	Concept	Mathematical logic and foundations
Lp space	Concept	Functional analysis
Quaternionic analysis	Concept	Functions of a complex variable
Artin group	Concept	Group theory and generalizations
Quasiconformal mapping	Concept	Functions of a complex variable
Binary quadratic form	Concept	Number theory
Weyl tensor	Concept	Differential geometry
Marsden–Weinstein reduction	Concept	Differential geometry
Extremal graph theory	Concept	Combinatorics
Adele ring	Concept	Number theory
Puiseux series	Concept	Commutative algebra
Block system	Concept	Group theory and generalizations
Linking number	Concept	Manifolds and cell complexes
Hilbertian field	Concept	Field theory and polynomials
Green's function	Concept	Ordinary differential equations
Local class field theory	Concept	Number theory
Order of an entire function	Concept	Functions of a complex variable
Hamilton–Jacobi–Bellman equation	Concept	Calculus of variations and optimal control; optimization
Homotopy type	Concept	Algebraic topology
Null-homotopic map	Concept	Algebraic topology
Grothendieck universe	Concept	Mathematical logic and foundations
Topological group structure of a vector space	Concept	Functional analysis
Carleson measure	Concept	Functions of a complex variable
Hadamard product	Concept	Linear and multilinear algebra; matrix theory
Gaussian curvature	Concept	Differential geometry
Polynomial interpolation	Concept	Approximations and expansions
Beth number	Concept	Mathematical logic and foundations
Hausdorff dimension	Concept	Measure and integration
Betti number	Concept	Algebraic topology
Non-atomic measure	Concept	Measure and integration
Lindelöf space	Concept	General topology
Crossing number	Concept	Manifolds and cell complexes
Determinantal ideal	Concept	Commutative algebra
Banach limit	Concept	Sequences, series, summability
Matroid rank	Concept	Combinatorics
Manifold with corners	Concept	Global analysis, analysis on manifolds
Reduced ring	Concept	Commutative algebra
Holomorphic map between Riemann surfaces	Concept	Functions of a complex variable
Borel–Moore homology	Concept	Algebraic topology
Compositum of fields	Concept	Field theory and polynomials
Gorenstein ring	Concept	Commutative algebra
Fractional calculus	Concept	Real functions
E-infinity operad	Concept	Algebraic topology
Stable theory	Concept	Mathematical logic and foundations
Cobordism	Concept	Manifolds and cell complexes
Multivariate division algorithm	Concept	Commutative algebra
Pointed space	Concept	Algebraic topology
Error-correcting code	Concept	Information and communication theory, circuits
Picard–Vessiot extension	Concept	Field theory and polynomials
Poisson kernel	Concept	Potential theory
Ehresmann connection	Concept	Differential geometry
Backward differentiation formula	Concept	Numerical analysis
Hopf invariant	Concept	Algebraic topology
Descriptive set theory	Concept	Mathematical logic and foundations
Geometric realization	Concept	Algebraic topology
Normal form	Concept	Ordinary differential equations
Finitely presented group	Concept	Group theory and generalizations
Free product	Concept	Group theory and generalizations
Boundary value problem	Concept	Ordinary differential equations
Degree of a continuous map	Concept	Algebraic topology
Primary ideal	Concept	Commutative algebra
Laplacian matrix	Concept	Combinatorics
Computably enumerable set	Concept	Mathematical logic and foundations
Formal group law in topology	Concept	Algebraic topology
Random graph	Concept	Combinatorics
Closure of an operator	Concept	Operator theory
Pick matrix	Concept	Functions of a complex variable
Stokes phenomenon	Concept	Ordinary differential equations
Parallel transport	Concept	Differential geometry
Finite type invariant	Concept	Manifolds and cell complexes
Continuous-time Markov chain	Concept	Probability theory and stochastic processes
Beurling–Ahlfors transform	Concept	Harmonic analysis on Euclidean spaces
Summation in topological groups	Concept	Sequences, series, summability
Internal set theory	Concept	Mathematical logic and foundations
G-delta set	Concept	General topology
Dynkin system	Concept	Measure and integration
p-adic integer	Concept	Field theory and polynomials
Radical extension	Concept	Field theory and polynomials
Simplicial complex	Concept	Combinatorics
Martin's axiom	Concept	Mathematical logic and foundations
Operator space	Concept	Operator theory
n-skeleton	Concept	Manifolds and cell complexes
Fractional Brownian motion	Concept	Probability theory and stochastic processes
Word metric	Concept	Group theory and generalizations
Dual operator	Concept	Operator theory
Cyclotomic extension	Concept	Field theory and polynomials
Hausdorff content	Concept	Measure and integration
Wasserstein metric	Concept	Calculus of variations and optimal control; optimization
Nonexpansive map	Concept	Operator theory
Cyclic extension	Concept	Field theory and polynomials
Signed measure	Concept	Measure and integration
Surface	Concept	Manifolds and cell complexes
List coloring	Concept	Combinatorics
Lindeberg's condition	Concept	Probability theory and stochastic processes
Risch algorithm	Concept	Computer science
Zeta function regularization	Concept	Number theory
Köthe–Toeplitz dual	Concept	Functional analysis
Perfectly normal space	Concept	General topology
Submanifold	Concept	Global analysis, analysis on manifolds
Closed operator	Concept	Operator theory
Infinitesimal generator of a Markov process	Concept	Probability theory and stochastic processes
Algebraic combinatorics	Concept	Combinatorics
Null set	Concept	Measure and integration
Steenrod square	Concept	Algebraic topology
Eigenvalue perturbation	Concept	Linear and multilinear algebra; matrix theory
Uniform integrability	Concept	Measure and integration
Totally unimodular matrix	Concept	Linear and multilinear algebra; matrix theory
Character sum	Concept	Number theory
Perfect field	Concept	Field theory and polynomials
Gelfand transform	Concept	Functional analysis
Tensor decomposition	Concept	Linear and multilinear algebra; matrix theory
Hardy–Littlewood maximal function	Concept	Harmonic analysis on Euclidean spaces
Interpolation space	Concept	Functional analysis
Exact couple	Concept	Algebraic topology
Exponential stability	Concept	Ordinary differential equations
G-structure	Concept	Differential geometry