Concepts

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

Ideas 3451–3600 of 5206.

Name	Kind	Subject
Differential equations in Banach spaces	Concept	Ordinary differential equations
Topological modular forms	Concept	Algebraic topology
Mixed model	Concept	Statistics
Symbolic method	Concept	Combinatorics
Accelerated failure time model	Concept	Statistics
Einstein–Hilbert action	Concept	Relativity and gravitational theory
Nonnegative matrix	Concept	Linear and multilinear algebra; matrix theory
Quasifield	Concept	Field theory and polynomials
Stiefel–Whitney class	Concept	Manifolds and cell complexes
Fixed-point property	Concept	General topology
Galois representation	Concept	Number theory
Veblen function	Concept	Mathematical logic and foundations
Homoclinic bifurcation	Concept	Dynamical systems and ergodic theory
Integral functional with a Lagrangian density	Concept	Calculus of variations and optimal control; optimization
Shock wave	Concept	Partial differential equations
Complex manifold	Concept	Several complex variables and analytic spaces
Analytic semigroup	Concept	Operator theory
Modulation space	Concept	Harmonic analysis on Euclidean spaces
Frobenius norm	Concept	Linear and multilinear algebra; matrix theory
Log-gamma function	Concept	Special functions
Riemann–Stieltjes integral	Concept	Real functions
Many-one reduction	Concept	Mathematical logic and foundations
Stalk	Concept	General topology
Local trivialization	Concept	Algebraic topology
Riemann–Liouville integral	Concept	Real functions
Von Neumann–Bernays–Gödel set theory	Concept	Mathematical logic and foundations
Normal family	Concept	Functions of a complex variable
Elliptic gamma function	Concept	Special functions
Perturbation theory of linear operators	Concept	Operator theory
Bifurcation set	Concept	Global analysis, analysis on manifolds
Mapping class group	Concept	Manifolds and cell complexes
Geometric measure theory	Concept	Calculus of variations and optimal control; optimization
Factorization of polynomials	Concept	Commutative algebra
Hyperbolic group	Concept	Group theory and generalizations
Affine independence	Concept	Geometry
Steenrod algebra	Concept	Algebraic topology
Multiplicity of a local ring	Concept	Commutative algebra
Cup product	Concept	Algebraic topology
Affine connection	Concept	Differential geometry
Box–Jenkins method	Concept	Statistics
Littlewood's three principles	Concept	Measure and integration
Minimal variety	Concept	General algebraic systems
Morphism of schemes	Concept	Algebraic geometry
Frobenius group	Concept	Group theory and generalizations
Fourier series method	Concept	Partial differential equations
Kauffman bracket	Concept	Manifolds and cell complexes
Infinite product	Concept	Sequences, series, summability
Siggers term	Concept	General algebraic systems
Statistical inference	Concept	Statistics
Translation plane	Concept	Geometry
Torsion tensor	Concept	Differential geometry
Torsion group	Concept	Group theory and generalizations
Keller–Segel model	Concept	Partial differential equations
Product order	Concept	Order, lattices, ordered algebraic structures
Néron model	Concept	Algebraic geometry
Dirac bundle	Concept	Differential geometry
Advanced Z-transform	Concept	Integral transforms, operational calculus
Motive	Concept	Algebraic geometry
Subanalytic set	Concept	Several complex variables and analytic spaces
Discrete-time algebraic Riccati equation	Concept	Linear and multilinear algebra; matrix theory
Baire function	Concept	Real functions
Struve function	Concept	Special functions
Fundamental solution	Concept	Partial differential equations
Order of a projective plane	Concept	Geometry
Sublinear function	Concept	Functional analysis
Statistical model	Concept	Statistics
Van Wijngaarden transformation	Concept	Numerical analysis
Hyperbolic knot	Concept	Manifolds and cell complexes
Ribbon Hopf algebra	Concept	Associative rings and algebras
Dense order	Concept	Order, lattices, ordered algebraic structures
Field of extremals	Concept	Calculus of variations and optimal control; optimization
Calderón projector	Concept	Partial differential equations
Affine differential geometry	Concept	Differential geometry
Dirichlet series as Mellin transforms	Concept	Number theory
Spectral theory	Concept	Operator theory
Total ring of fractions	Concept	Commutative algebra
Generalized linear model	Concept	Statistics
Value function	Concept	Calculus of variations and optimal control; optimization
Linear recurrence with polynomial coefficients	Concept	Difference and functional equations
Fixed-point iteration	Concept	Operator theory
Rational equivalence	Concept	Algebraic geometry
Walsh–Hadamard transform	Concept	Harmonic analysis on Euclidean spaces
Equivalence of categories	Concept	Category theory; homological algebra
Set of uniqueness	Concept	Harmonic analysis on Euclidean spaces
Supporting hyperplane	Concept	Convex and discrete geometry
Seifert surface	Concept	Manifolds and cell complexes
Sketch	Concept	Category theory; homological algebra
Cohomology operation	Concept	Algebraic topology
Hypoelliptic operator	Concept	Partial differential equations
Profinite group	Concept	Group theory and generalizations
Birational map	Concept	Algebraic geometry
Stochastic Volterra equation	Concept	Probability theory and stochastic processes
Ordinal arithmetic	Concept	Mathematical logic and foundations
Additive functor	Concept	Category theory; homological algebra
Computational geometry	Concept	Computer science
Sheaf cohomology in topology	Concept	Algebraic topology
Completion of a ring	Concept	Commutative algebra
Hilbert C*-module	Concept	Functional analysis
Homomorphism	Concept	General algebraic systems
Representable functor	Concept	Category theory; homological algebra
VC dimension	Concept	Combinatorics
Heat kernel	Concept	Partial differential equations
C* identity	Concept	Functional analysis
Isomonodromic deformation	Concept	Ordinary differential equations
Preconditioner	Concept	Numerical analysis
Functional data analysis	Concept	Statistics
Additive function	Concept	Difference and functional equations
Gale diagram	Concept	Convex and discrete geometry
Algebraic surface	Concept	Algebraic geometry
Witt group	Concept	Number theory
Finitely additive measure	Concept	Measure and integration
Transcritical bifurcation	Concept	Ordinary differential equations
Cayley–Menger determinant	Concept	Geometry
Outer function	Concept	Functions of a complex variable
Injective algebra	Concept	General algebraic systems
Mosco convergence	Concept	Calculus of variations and optimal control; optimization
Curve complex	Concept	Manifolds and cell complexes
Strong operator topology	Concept	Operator theory
Nichols algebra	Concept	Associative rings and algebras
Laplace–Stieltjes transform	Concept	Integral transforms, operational calculus
Lusin area integral	Concept	Harmonic analysis on Euclidean spaces
Étale fundamental group	Concept	Algebraic geometry
Tight closure	Concept	Commutative algebra
Observed information	Concept	Statistics
Short exact sequence	Concept	Category theory; homological algebra
Completion of a measure	Concept	Measure and integration
Hilbert's axioms	Concept	Geometry
Tricolorability	Concept	Manifolds and cell complexes
Unital magma	Concept	Group theory and generalizations
Ringed space	Concept	Algebraic geometry
Siegel disc	Concept	Dynamical systems and ergodic theory
Fundamental domain	Concept	Topological groups, Lie groups
Quasi-Frobenius ring	Concept	Associative rings and algebras
Differentially closed field	Concept	Field theory and polynomials
Quasi-coherent sheaf	Concept	Algebraic geometry
Morse function	Concept	Manifolds and cell complexes
Hall subgroup	Concept	Group theory and generalizations
Matrix pencil	Concept	Linear and multilinear algebra; matrix theory
Self-injective ring	Concept	Associative rings and algebras
Kolmogorov backward equation	Concept	Probability theory and stochastic processes
Bateman transform	Concept	Partial differential equations
Normal ring	Concept	Commutative algebra
Ordered group	Concept	Order, lattices, ordered algebraic structures
Unbounded operator	Concept	Operator theory
Field norm	Concept	Field theory and polynomials
Euclidean geometry	Concept	Geometry
Versal unfolding	Concept	Global analysis, analysis on manifolds
Autoregressive integrated moving average	Concept	Statistics
Class number	Concept	Number theory
dg category	Concept	Category theory; homological algebra