Concepts

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

Ideas 3751–3900 of 5206.

Name	Kind	Subject
Analytic torsion	Concept	Global analysis, analysis on manifolds
Proportional hazards model	Concept	Statistics
Displacement convexity	Concept	Calculus of variations and optimal control; optimization
Crisis	Concept	Dynamical systems and ergodic theory
Haar system	Concept	Harmonic analysis on Euclidean spaces
Pluripolar set	Concept	Several complex variables and analytic spaces
Integrable system	Concept	Dynamical systems and ergodic theory
Operator monotone function	Concept	Operator theory
Large sieve	Concept	Number theory
Eulerian poset	Concept	Order, lattices, ordered algebraic structures
Cohen–Macaulay ring	Concept	Commutative algebra
Fitting subgroup	Concept	Group theory and generalizations
Risk function	Concept	Statistics
Subdivision surface	Concept	Numerical analysis
Circle map	Concept	Dynamical systems and ergodic theory
Projective geometry	Concept	Geometry
Free functor	Concept	General algebraic systems
Regularity theory	Concept	Partial differential equations
Hankel functions	Concept	Special functions
Semisimple module	Concept	Associative rings and algebras
Ideal sheaf	Concept	Algebraic geometry
Varifold	Concept	Calculus of variations and optimal control; optimization
Approximate point spectrum	Concept	Operator theory
Pseudoholomorphic curve	Concept	Several complex variables and analytic spaces
Mean-periodic function	Concept	Harmonic analysis on Euclidean spaces
Proof theory	Concept	Mathematical logic and foundations
Measurable space	Concept	Measure and integration
Order polytope	Concept	Order, lattices, ordered algebraic structures
Space of functions vanishing at infinity	Concept	Functional analysis
Quotient algebra	Concept	General algebraic systems
Liouvillian function	Concept	Field theory and polynomials
Mellin transform	Concept	Integral transforms, operational calculus
Geometric morphism	Concept	Category theory; homological algebra
Divided differences	Concept	Numerical analysis
Hyperplane arrangement	Concept	Convex and discrete geometry
Adjunction space	Concept	General topology
Basic open set	Concept	Algebraic geometry
Fractional Sobolev space	Concept	Functional analysis
Perfect map	Concept	General topology
Linearly disjoint extensions	Concept	Field theory and polynomials
Linear and stable summation methods	Concept	Sequences, series, summability
Cap product	Concept	Algebraic topology
Double complex	Concept	Category theory; homological algebra
Geometric algebra	Concept	Linear and multilinear algebra; matrix theory
Hopf module	Concept	Associative rings and algebras
Cesàro summation	Concept	Sequences, series, summability
Finite morphism	Concept	Algebraic geometry
Heteroclinic orbit	Concept	Ordinary differential equations
Term operation	Concept	General algebraic systems
Anderson–Darling test	Concept	Statistics
Lacunary series	Concept	Harmonic analysis on Euclidean spaces
Minimal harmonic function	Concept	Potential theory
Positive element	Concept	Functional analysis
Quaternion-Kähler manifold	Concept	Differential geometry
Spheroidal wave function	Concept	Special functions
Sign test	Concept	Statistics
Tomita–Takesaki theory	Concept	Functional analysis
Independent component analysis	Concept	Statistics
Sweedler notation	Concept	Associative rings and algebras
Substitution	Concept	Mathematical logic and foundations
Floer homology	Concept	Differential geometry
Quasitriangular Hopf algebra	Concept	Associative rings and algebras
Noetherian scheme	Concept	Algebraic geometry
Hyperfunction	Concept	Functional analysis
Burgers' equation	Concept	Partial differential equations
Categorical logic	Concept	Mathematical logic and foundations
Bézier curve	Concept	Numerical analysis
Atomless Boolean algebra	Concept	Order, lattices, ordered algebraic structures
Three-term recurrence relation	Concept	Difference and functional equations
Krein space	Concept	Functional analysis
Axiom of regularity	Concept	Mathematical logic and foundations
Stopped process	Concept	Probability theory and stochastic processes
Heyting algebra	Concept	Order, lattices, ordered algebraic structures
Inverse tangent integral	Concept	Special functions
Kripke semantics	Concept	Mathematical logic and foundations
Coercive functional	Concept	Calculus of variations and optimal control; optimization
Well-quasi-ordering	Concept	Order, lattices, ordered algebraic structures
Pfaffian	Concept	Linear and multilinear algebra; matrix theory
Partition of unity	Concept	Global analysis, analysis on manifolds
Gosper's algorithm	Concept	Special functions
Flag variety	Concept	Algebraic geometry
Lyapunov exponent	Concept	Ordinary differential equations
Connection on a principal bundle	Concept	Differential geometry
Residue field	Concept	Commutative algebra
Genus	Concept	Manifolds and cell complexes
Continuum	Concept	General topology
Reduced homology	Concept	Algebraic topology
Boolean model	Concept	Probability theory and stochastic processes
Moduli of algebraic curves	Concept	Algebraic geometry
Ergodic hypothesis	Concept	Dynamical systems and ergodic theory
Subobject classifier	Concept	Category theory; homological algebra
Absorbing set	Concept	Functional analysis
Givens rotation	Concept	Numerical analysis
Lie subgroup	Concept	Topological groups, Lie groups
Cyclotomic field	Concept	Number theory
Reflexive space	Concept	Functional analysis
Inner function	Concept	Functions of a complex variable
Resultant	Concept	Commutative algebra
Degree of a central simple algebra	Concept	Associative rings and algebras
Group of Lie type	Concept	Group theory and generalizations
Derived functor	Concept	Category theory; homological algebra
Period-doubling bifurcation	Concept	Dynamical systems and ergodic theory
Conway polynomial	Concept	Number theory
Fourier transform method for convolution equations	Concept	Integral equations
Hyperarithmetical theory	Concept	Mathematical logic and foundations
Lattice in a locally compact group	Concept	Topological groups, Lie groups
Torus knot	Concept	Manifolds and cell complexes
Kuratowski closure axioms	Concept	General topology
Bayes factor	Concept	Statistics
Hilbert transform	Concept	Integral transforms, operational calculus
Supermartingale	Concept	Probability theory and stochastic processes
Equicontinuous system	Concept	Dynamical systems and ergodic theory
Geodesic	Concept	Differential geometry
Successor order	Concept	Order, lattices, ordered algebraic structures
Hermitian symmetric space	Concept	Several complex variables and analytic spaces
Fibred category	Concept	Category theory; homological algebra
Shallow water equations	Concept	Fluid mechanics
Kummer's equation	Concept	Special functions
Condenser capacity	Concept	Potential theory
Specht module	Concept	Group theory and generalizations
Balayage	Concept	Potential theory
Lawvere theory	Concept	Category theory; homological algebra
U-statistic	Concept	Statistics
Screw theory	Concept	Mechanics of particles and systems
Splitting field of a central simple algebra	Concept	Associative rings and algebras
Numerical differentiation	Concept	Numerical analysis
Finitely generated variety	Concept	General algebraic systems
Associated bundle	Concept	Algebraic topology
Inaccessible cardinal	Concept	Mathematical logic and foundations
Pure weights	Concept	Number theory
Monge point	Concept	Geometry
Γ-convergence	Concept	Calculus of variations and optimal control; optimization
Holonomic sequence	Concept	Difference and functional equations
Montel space	Concept	Functional analysis
Osculating circle	Concept	Differential geometry
Morrey–Campanato space	Concept	Functional analysis
Total variation diminishing scheme	Concept	Numerical analysis
Oka manifold	Concept	Several complex variables and analytic spaces
Elliptic integral	Concept	Special functions
Semisimple ring	Concept	Associative rings and algebras
Chebyshev system	Concept	Approximations and expansions
Complex measure	Concept	Measure and integration
Non-uniform discrete Fourier transform	Concept	Numerical analysis
Site	Concept	Category theory; homological algebra
de Branges space	Concept	Functional analysis
Relatively free algebra	Concept	General algebraic systems
Nil ideal	Concept	Associative rings and algebras
Flux limiter	Concept	Numerical analysis
Coupling from the past	Concept	Numerical analysis
Unique ergodicity	Concept	Dynamical systems and ergodic theory