Concepts

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

Ideas 4201–4350 of 4454.

Name	Kind	Subject
Empirical process	Concept	Probability theory and stochastic processes
Grunsky matrix	Concept	Functions of a complex variable
Equidistribution modulo one	Concept	Number theory
Schwarz triangle function	Concept	Special functions
Néron–Severi group	Concept	Algebraic geometry
Hyperbolic conservation law	Concept	Partial differential equations
Sumset	Concept	Number theory
Factorization of polynomials over finite fields	Concept	Number theory
Hemicontinuity	Concept	General topology
Dirac equation	Concept	Partial differential equations
Branch point	Concept	Functions of a complex variable
Polynomial operation	Concept	General algebraic systems
Nuclear operator	Concept	Operator theory
Contraction semigroup	Concept	Operator theory
Intuitionism	Concept	Mathematical logic and foundations
Pseudovariety	Concept	General algebraic systems
Hotelling's T-squared distribution	Concept	Statistics
Amalgamation property	Concept	Mathematical logic and foundations
Dirichlet process	Concept	Probability theory and stochastic processes
Homology with coefficients	Concept	Algebraic topology
Weyl–Titchmarsh theory	Concept	Ordinary differential equations
Rational variety	Concept	Algebraic geometry
Well-powered category	Concept	Category theory; homological algebra
Gromov–Witten invariant	Concept	Algebraic geometry
Cardinal function	Concept	General topology
Semiprimary ring	Concept	Associative rings and algebras
Dynamical billiards	Concept	Dynamical systems and ergodic theory
Numerical range	Concept	Operator theory
Tilting theory	Concept	Associative rings and algebras
Elliptic operator	Concept	Operator theory
Umbilical point	Concept	Differential geometry
Sequence space	Concept	Functional analysis
Toric ideal	Concept	Commutative algebra
Homotopy equivalence	Concept	Algebraic topology
Kummer theory	Concept	Number theory
Mathematical statistics	Concept	Statistics
Finite-dimensional distributions	Concept	Probability theory and stochastic processes
Connected sum	Concept	Manifolds and cell complexes
Simple random sample	Concept	Statistics
Primitive permutation group	Concept	Group theory and generalizations
Falling and rising factorials	Concept	Combinatorics
Monotone operator	Concept	Operator theory
Hahn polynomials	Concept	Special functions
Pseudoanalytic function	Concept	Functions of a complex variable
q-Pochhammer symbol	Concept	Combinatorics
Universal cover	Concept	Manifolds and cell complexes
Mal'cev term	Concept	General algebraic systems
Algebraic K-theory of schemes	Concept	K-theory
Monomorphism	Concept	Category theory; homological algebra
Homotopy principle	Concept	Global analysis, analysis on manifolds
Iwasawa theory	Concept	Number theory
Enriques surface	Concept	Algebraic geometry
Evolute	Concept	Differential geometry
Class	Concept	Mathematical logic and foundations
Intersection body	Concept	Convex and discrete geometry
Galerkin method	Concept	Numerical analysis
Score test	Concept	Statistics
Sine and cosine series	Concept	Harmonic analysis on Euclidean spaces
Injectivity radius	Concept	Differential geometry
Glimm scheme	Concept	Partial differential equations
Castelnuovo–Mumford regularity	Concept	Commutative algebra
Hurewicz fibration	Concept	Algebraic topology
Lagrange polynomial	Concept	Approximations and expansions
Complex torus	Concept	Algebraic geometry
Cheeger constant	Concept	Combinatorics
Exponential map	Concept	Differential geometry
Hazard function	Concept	Statistics
Measure with density	Concept	Measure and integration
Abelian category	Concept	Category theory; homological algebra
Rigid analytic space	Concept	Algebraic geometry
Branched covering	Concept	Manifolds and cell complexes
Fractional ideal	Concept	Commutative algebra
Incomplete gamma function	Concept	Special functions
Schottky group	Concept	Functions of a complex variable
Hessenberg matrix	Concept	Linear and multilinear algebra; matrix theory
Boundary layer	Concept	Ordinary differential equations
Autocorrelation function	Concept	Statistics
Homotopy groups of spheres	Concept	Algebraic topology
Successive minima	Concept	Number theory
Frequentist inference	Concept	Statistics
Stationary set	Concept	Mathematical logic and foundations
HNN extension	Concept	Group theory and generalizations
Quasi-analytic function	Concept	Real functions
Unirational variety	Concept	Algebraic geometry
Limit set	Concept	Dynamical systems and ergodic theory
Excellent ring	Concept	Commutative algebra
Zero morphism	Concept	Category theory; homological algebra
(∞,1)-category	Concept	Category theory; homological algebra
Finite field arithmetic	Concept	Field theory and polynomials
Operator theory	Concept	Operator theory
Quantum invariant of 3-manifolds	Concept	Manifolds and cell complexes
Finitely based algebra	Concept	General algebraic systems
Triangulation	Concept	Manifolds and cell complexes
Scaling function and refinement equation	Concept	Harmonic analysis on Euclidean spaces
One-parameter subgroup	Concept	Topological groups, Lie groups
Poincaré–Lindstedt method	Concept	Ordinary differential equations
Eilenberg–Steenrod axioms	Concept	Algebraic topology
Perspective projection	Concept	Geometry
Lommel function	Concept	Special functions
Combinatorics on words	Concept	Computer science
WKB approximation	Concept	Ordinary differential equations
Analytic combinatorics	Concept	Combinatorics
Commuting elements	Concept	General algebraic systems
3-j symbol	Concept	Special functions
Mirror symmetry	Concept	Algebraic geometry
Developable surface	Concept	Differential geometry
Likelihood-ratio test	Concept	Statistics
Ordinary least squares	Concept	Statistics
Bredon cohomology	Concept	Algebraic topology
Synchronization of chaos	Concept	Ordinary differential equations
Nonassociative ring	Concept	Nonassociative rings and algebras
Chevalley group	Concept	Group theory and generalizations
Locally finite measure	Concept	Measure and integration
Artinian module	Concept	Associative rings and algebras
Hahn series	Concept	Commutative algebra
Model complete theory	Concept	Mathematical logic and foundations
Kolmogorov automorphism	Concept	Dynamical systems and ergodic theory
Integro-differential equation	Concept	Integral equations
Adapted process	Concept	Probability theory and stochastic processes
Gaussian binomial coefficient	Concept	Combinatorics
Nome	Concept	Special functions
Nevanlinna characteristic	Concept	Functions of a complex variable
Continuous and residual spectrum	Concept	Operator theory
Simplicial polytope	Concept	Convex and discrete geometry
Topology of uniform convergence	Concept	General topology
Club set	Concept	Mathematical logic and foundations
Toric variety	Concept	Algebraic geometry
Instanton	Concept	Differential geometry
Trace form	Concept	Field theory and polynomials
Rate of convergence	Concept	Sequences, series, summability
Simplex	Concept	Geometry
Uniform module	Concept	Associative rings and algebras
Group cohomology	Concept	Group theory and generalizations
Projective object	Concept	Category theory; homological algebra
Inversion in a circle	Concept	Geometry
Arakelov theory	Concept	Algebraic geometry
Fractional differential equation	Concept	Ordinary differential equations
J-homomorphism	Concept	Algebraic topology
Measurable function	Concept	Measure and integration
Measure algebra	Concept	Measure and integration
Pochhammer symbol	Concept	Combinatorics
Field of formal Laurent series	Concept	Commutative algebra
Koszul complex	Concept	Commutative algebra
Kolmogorov–Smirnov test	Concept	Statistics
Schubert variety	Concept	Algebraic geometry
Uniserial module	Concept	Associative rings and algebras
Order filter	Concept	Order, lattices, ordered algebraic structures
Cotangent space of a local ring	Concept	Commutative algebra
Difference algebra	Concept	Field theory and polynomials
Subharmonic function	Concept	Potential theory