Concepts

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

Ideas 3001–3150 of 5206.

Name	Kind	Subject
Equational theory	Concept	General algebraic systems
Left-orderable group	Concept	Group theory and generalizations
Pseudospectrum	Concept	Numerical analysis
Chern–Simons theory	Concept	Manifolds and cell complexes
Semiorder	Concept	Order, lattices, ordered algebraic structures
Acyclic object	Concept	Category theory; homological algebra
Forcing	Concept	Mathematical logic and foundations
Harish-Chandra character	Concept	Topological groups, Lie groups
Homotopic maps	Concept	Algebraic topology
Principal symbol	Concept	Partial differential equations
Atomic domain	Concept	Commutative algebra
Lattice polytope	Concept	Convex and discrete geometry
Krull topology	Concept	Field theory and polynomials
Stable distribution	Concept	Probability theory and stochastic processes
Synthetic differential geometry	Concept	Geometry
Quasi-ergodicity	Concept	Dynamical systems and ergodic theory
Smooth manifold	Concept	Global analysis, analysis on manifolds
Frame bundle	Concept	Global analysis, analysis on manifolds
Laplace–Beltrami operator	Concept	Global analysis, analysis on manifolds
Banach bundle	Concept	Global analysis, analysis on manifolds
Reduced product	Concept	General algebraic systems
Gross–Pitaevskii equation	Concept	Partial differential equations
Hopf bifurcation	Concept	Ordinary differential equations
Quasi-measure-preserving map	Concept	Measure and integration
Regular polytope	Concept	Geometry
Information geometry	Concept	Differential geometry
Log-rank test	Concept	Statistics
Bloch space	Concept	Functions of a complex variable
Filter limit	Concept	General topology
Adic space	Concept	Algebraic geometry
Positive-definite function	Concept	Harmonic analysis on Euclidean spaces
Hausdorff distance	Concept	General topology
State on a C*-algebra	Concept	Functional analysis
Fractional Laplacian	Concept	Partial differential equations
Darboux integral	Concept	Real functions
Shearlet	Concept	Harmonic analysis on Euclidean spaces
Principal curvature	Concept	Differential geometry
Fourier analysis	Concept	Harmonic analysis on Euclidean spaces
Spectrum of a ring	Concept	Algebraic geometry
Reflective subcategory	Concept	Category theory; homological algebra
Accessible category	Concept	Category theory; homological algebra
Henstock–Kurzweil integral	Concept	Real functions
Wigner distribution function	Concept	Quantum theory
Convolution on the half-line	Concept	Integral transforms, operational calculus
Primary obstruction	Concept	Algebraic topology
Quasi-invariant measure	Concept	Measure and integration
Kan complex	Concept	Category theory; homological algebra
Locally connected space	Concept	General topology
Multiple integral	Concept	Real functions
j-invariant	Concept	Number theory
Eilenberg–Moore category	Concept	Category theory; homological algebra
Support of a module	Concept	Commutative algebra
Topological data analysis	Concept	Statistics
Pseudo-differential operator	Concept	Partial differential equations
Plurisubharmonic function	Concept	Several complex variables and analytic spaces
Monad	Concept	Category theory; homological algebra
Elliptic function	Concept	Special functions
Picard–Lefschetz theory	Concept	Several complex variables and analytic spaces
Geometric quantization	Concept	Differential geometry
Incidence structure	Concept	Geometry
Plurisubharmonic exhaustion function	Concept	Several complex variables and analytic spaces
Trapezoidal rule	Concept	Numerical analysis
Groupoid	Concept	Group theory and generalizations
Schreier–Sims algorithm	Concept	Computer science
Periodic solution	Concept	Ordinary differential equations
Compact quantum group	Concept	Functional analysis
Cartier divisor	Concept	Algebraic geometry
Schouten–Nijenhuis bracket	Concept	Global analysis, analysis on manifolds
Convergence tests	Concept	Sequences, series, summability
Moduli space	Concept	Algebraic geometry
Lebesgue–Stieltjes integration	Concept	Real functions
Subnormal subgroup	Concept	Group theory and generalizations
Multiple gamma function	Concept	Special functions
Stein equation	Concept	Linear and multilinear algebra; matrix theory
Order type	Concept	Order, lattices, ordered algebraic structures
Fano variety	Concept	Algebraic geometry
Symbolic power	Concept	Commutative algebra
Pontryagin dual	Concept	Abstract harmonic analysis
Method of lines	Concept	Numerical analysis
Gaussian quadrature	Concept	Numerical analysis
Seminorm	Concept	Functional analysis
Generalized inverse	Concept	Linear and multilinear algebra; matrix theory
Floquet multiplier	Concept	Ordinary differential equations
q-difference equation	Concept	Difference and functional equations
Support of a measure	Concept	Measure and integration
Elliptic hypergeometric series	Concept	Special functions
Topological transitivity	Concept	Dynamical systems and ergodic theory
Meshfree methods	Concept	Numerical analysis
Riesz transform	Concept	Harmonic analysis on Euclidean spaces
Essential spectrum	Concept	Operator theory
Subobject	Concept	Category theory; homological algebra
Logarithm of a matrix	Concept	Linear and multilinear algebra; matrix theory
Homogeneous coordinates	Concept	Geometry
Jacobi equation	Concept	Calculus of variations and optimal control; optimization
Fuzzy algebraic structure	Concept	General algebraic systems
Birkhoff interpolation	Concept	Approximations and expansions
Tropical variety	Concept	Algebraic geometry
Calculus of finite differences	Concept	Difference and functional equations
Inner measure	Concept	Measure and integration
Abscissa of convergence	Concept	Integral transforms, operational calculus
Koszul algebra	Concept	Associative rings and algebras
Spectral triple	Concept	Global analysis, analysis on manifolds
Étale morphism of rings	Concept	Commutative algebra
Griffiths positivity	Concept	Several complex variables and analytic spaces
Entourage	Concept	General topology
Topology of pointwise convergence	Concept	General topology
Boolean-valued model	Concept	Mathematical logic and foundations
Fokker–Planck equation	Concept	Partial differential equations
Lambert W function	Concept	Special functions
Schubert calculus	Concept	Algebraic geometry
Complete category	Concept	Category theory; homological algebra
Irreducible representation	Concept	Group theory and generalizations
Biholomorphism	Concept	Several complex variables and analytic spaces
Net of a polyhedron	Concept	Convex and discrete geometry
Horner's method	Concept	Computer science
Concrete category	Concept	Category theory; homological algebra
Morita equivalence of Lie groupoids	Concept	Topological groups, Lie groups
Pseudospectral optimal control	Concept	Calculus of variations and optimal control; optimization
Baire property	Concept	General topology
Zassenhaus neighbourhood	Concept	Topological groups, Lie groups
Christoffel symbols	Concept	Differential geometry
Trigonometric series	Concept	Harmonic analysis on Euclidean spaces
Simple module	Concept	Associative rings and algebras
Least harmonic majorant	Concept	Potential theory
Integral closure	Concept	Commutative algebra
Dilogarithm	Concept	Special functions
Barycentric coordinates	Concept	Geometry
Butterfly effect	Concept	Dynamical systems and ergodic theory
Fourier series	Concept	Harmonic analysis on Euclidean spaces
Cramér–von Mises criterion	Concept	Statistics
Fisher information	Concept	Statistics
Quasisymmetric map	Concept	Functions of a complex variable
Crossed product algebra	Concept	Associative rings and algebras
Modular representation theory	Concept	Group theory and generalizations
Locale	Concept	Order, lattices, ordered algebraic structures
Lax pair	Concept	Dynamical systems and ergodic theory
Spectral space	Concept	General topology
Cohn localization	Concept	Associative rings and algebras
Bridge number	Concept	Manifolds and cell complexes
Deficiency indices	Concept	Operator theory
Homotopy lifting property	Concept	Algebraic topology
Hurwitz zeta function	Concept	Number theory
Residue field of a point	Concept	Algebraic geometry
Purely transcendental extension	Concept	Field theory and polynomials
Group	Concept	Group theory and generalizations
Ramsey theory	Concept	Combinatorics
Convergence in measure	Concept	Measure and integration
Coxeter group	Concept	Group theory and generalizations
Affine group	Concept	Geometry
Singular perturbation	Concept	Ordinary differential equations