Concepts

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

Ideas 2401–2550 of 5206.

Name	Kind	Subject
Presheaf	Concept	Category theory; homological algebra
Tensor product of fields	Concept	Field theory and polynomials
Lane–Emden equation	Concept	Partial differential equations
Handlebody	Concept	Manifolds and cell complexes
Quantum group	Concept	Associative rings and algebras
Nakayama algebra	Concept	Associative rings and algebras
Isogeometric analysis	Concept	Numerical analysis
Superharmonic potential	Concept	Potential theory
Schramm–Loewner evolution	Concept	Probability theory and stochastic processes
Positive linear operator	Concept	Operator theory
Zero object	Concept	Category theory; homological algebra
Knot group	Concept	Manifolds and cell complexes
Simple homotopy equivalence	Concept	Manifolds and cell complexes
Near-ring	Concept	Associative rings and algebras
Resolvent kernel	Concept	Integral equations
Arbitrary-precision arithmetic	Concept	Numerical analysis
Boolean matrix	Concept	Linear and multilinear algebra; matrix theory
Biharmonic equation	Concept	Potential theory
P-adic analysis	Concept	Functions of a complex variable
Minimax approximation	Concept	Approximations and expansions
Irregular singularity	Concept	Ordinary differential equations
Projection-valued measure	Concept	Operator theory
Alexandrov topology	Concept	General topology
Volterra equation of the second kind	Concept	Integral equations
Point estimation	Concept	Statistics
Del Pezzo surface	Concept	Algebraic geometry
Kirby calculus	Concept	Manifolds and cell complexes
Clausen function	Concept	Special functions
Totally disconnected group	Concept	Topological groups, Lie groups
Fréchet algebra	Concept	Functional analysis
Numerical methods for linear least squares	Concept	Numerical analysis
Endomorphism ring	Concept	Associative rings and algebras
Supersolvable group	Concept	Group theory and generalizations
Ultraproduct	Concept	Mathematical logic and foundations
Modulus of continuity	Concept	Real functions
Stereographic projection	Concept	Functions of a complex variable
Fisher's equation	Concept	Partial differential equations
Klein–Gordon equation	Concept	Partial differential equations
Dispersive partial differential equation	Concept	Partial differential equations
Iterated function	Concept	Dynamical systems and ergodic theory
Linear integral equation	Concept	Integral equations
Painlevé transcendents	Concept	Special functions
Difference quotient	Concept	Real functions
Lifting property	Concept	Category theory; homological algebra
Ergodic transformation	Concept	Dynamical systems and ergodic theory
Restricted isometry property	Concept	Information and communication theory, circuits
Cobweb plot	Concept	Dynamical systems and ergodic theory
Bounded poset	Concept	Order, lattices, ordered algebraic structures
Day terms	Concept	General algebraic systems
Autoregressive–moving-average model	Concept	Statistics
Series acceleration	Concept	Numerical analysis
Tate algebra	Concept	Several complex variables and analytic spaces
Stochastic differential equation	Concept	Probability theory and stochastic processes
Sasakian manifold	Concept	Differential geometry
Invariant measure	Concept	Dynamical systems and ergodic theory
Stochastic optimal control	Concept	Systems theory; control
Catenary ring	Concept	Commutative algebra
Additive category	Concept	Category theory; homological algebra
Conley index	Concept	Dynamical systems and ergodic theory
Affine scheme	Concept	Algebraic geometry
Kissing number	Concept	Convex and discrete geometry
Symmetric derivative	Concept	Real functions
Coefficient of determination	Concept	Statistics
Symplectic integrator	Concept	Numerical analysis
Codimension of a singularity	Concept	Global analysis, analysis on manifolds
Riemannian distance	Concept	Differential geometry
Elliptic partial differential equation	Concept	Partial differential equations
Regular prime	Concept	Number theory
Curve of constant width	Concept	Convex and discrete geometry
Lindelöf summation	Concept	Sequences, series, summability
Difference kernel	Concept	Integral equations
Period and index	Concept	Associative rings and algebras
P-adic dynamics	Concept	Dynamical systems and ergodic theory
Numerical analysis	Concept	Numerical analysis
QR algorithm	Concept	Numerical analysis
Locally convex space	Concept	Functional analysis
Double sequence	Concept	Sequences, series, summability
Topological mixing	Concept	Dynamical systems and ergodic theory
Regular boundary point	Concept	Potential theory
Kaplan–Meier estimator	Concept	Statistics
Asymptotic expansion from poles of a Mellin transform	Concept	Integral transforms, operational calculus
Locally ringed space	Concept	Algebraic geometry
Splitting of prime ideals	Concept	Number theory
Integral extension	Concept	Commutative algebra
Valuation	Concept	Field theory and polynomials
Infinite compositions of functions	Concept	Sequences, series, summability
Chebyshev functions	Concept	Number theory
Plücker coordinates	Concept	Geometry
Spectrum of the Laplace–Beltrami operator	Concept	Global analysis, analysis on manifolds
Numerical linear algebra	Concept	Numerical analysis
Constructive function theory	Concept	Approximations and expansions
Besicovitch almost periodic function	Concept	Harmonic analysis on Euclidean spaces
Sidon set	Concept	Number theory
Substitution tiling	Concept	Dynamical systems and ergodic theory
Ring spectrum	Concept	Algebraic topology
Cofinality	Concept	Mathematical logic and foundations
Flag manifold	Concept	Algebraic geometry
Differentiation operator p	Concept	Integral transforms, operational calculus
Bergman metric	Concept	Several complex variables and analytic spaces
Dynamical system	Concept	Dynamical systems and ergodic theory
Iterative functional equation	Concept	Difference and functional equations
Densely defined operator	Concept	Operator theory
Lambda calculus	Concept	Mathematical logic and foundations
Tautological line bundle	Concept	Algebraic geometry
Interior algebra	Concept	Order, lattices, ordered algebraic structures
Multiply transitive group action	Concept	Group theory and generalizations
Energy drift	Concept	Numerical analysis
Topological entropy	Concept	Dynamical systems and ergodic theory
Arithmetic dynamics	Concept	Dynamical systems and ergodic theory
Whitney sum	Concept	Algebraic topology
Uniformly convex space	Concept	Functional analysis
Class field theory	Concept	Number theory
Brauer group	Concept	Associative rings and algebras
Type and cotype	Concept	Functional analysis
Cartesian closed category	Concept	Category theory; homological algebra
Radical axis	Concept	Geometry
Projective module	Concept	Commutative algebra
Empirical likelihood	Concept	Statistics
Benz plane	Concept	Geometry
Deck transformation group	Concept	Manifolds and cell complexes
Several complex variables	Concept	Several complex variables and analytic spaces
Percolation theory	Concept	Probability theory and stochastic processes
Outer measure	Concept	Measure and integration
Asymptotic expansion	Concept	Approximations and expansions
Colimit	Concept	Category theory; homological algebra
Vietoris topology	Concept	General topology
Floquet theory	Concept	Ordinary differential equations
Euler class	Concept	Manifolds and cell complexes
Kleene algebra	Concept	Associative rings and algebras
Tate–Shafarevich group	Concept	Number theory
Spencer cohomology	Concept	Global analysis, analysis on manifolds
Multiplier ideal	Concept	Algebraic geometry
Dynamic equation on time scales	Concept	Ordinary differential equations
Spherical function	Concept	Abstract harmonic analysis
Multivariate interpolation	Concept	Approximations and expansions
Prolongation of a section to a jet bundle	Concept	Global analysis, analysis on manifolds
Spectrum of an operator	Concept	Operator theory
Submersion	Concept	Manifolds and cell complexes
Smoothing spline	Concept	Numerical analysis
Hilbert–Samuel function	Concept	Commutative algebra
Braid group	Concept	Group theory and generalizations
Lattice homomorphism	Concept	Order, lattices, ordered algebraic structures
Frame operator	Concept	Harmonic analysis on Euclidean spaces
Enriched category	Concept	Category theory; homological algebra
Galois insertion	Concept	Order, lattices, ordered algebraic structures
Regularity structures	Concept	Probability theory and stochastic processes
Ramification group	Concept	Number theory
Newton–Cotes formulas	Concept	Numerical analysis
Complex dynamics	Concept	Dynamical systems and ergodic theory
Breakdown point	Concept	Statistics