Every idea

Ideas 8851–9000 of 14183.

Name	Kind	Subject
Stratified sampling	Definition	Statistics
Hyperbolic geometry	Concept	Geometry
Proof of Extension of Lagrange's theorem	Proof	Group theory and generalizations
IEEE 754 standard	Concept	Numerical analysis
Group law on an elliptic curve	Definition	Algebraic geometry
Reduction of a first-kind Volterra equation to the second kind	Proposition	Integral equations
Prime end	Concept	Functions of a complex variable
Involution	Concept	General algebraic systems
Chebyshev series	Concept	Approximations and expansions
Superlinear convergence of the secant method	Theorem	Numerical analysis
Shrinkage estimator	Concept	Statistics
Representability of cohomology by Eilenberg–MacLane spaces	Theorem	Algebraic topology
Continuity principle	Theorem	Potential theory
Conditioned Brownian motion	Definition	Probability theory and stochastic processes
Gelfand pair	Definition	Abstract harmonic analysis
Fefferman's expansion of the Bergman kernel	Theorem	Several complex variables and analytic spaces
Intersection multiplicity	Concept	Algebraic geometry
Inoue surface	Example	Several complex variables and analytic spaces
Retract	Definition	General algebraic systems
Toeplitz operator	Concept	Operator theory
Lamé equations of elasticity	Concept	Mechanics of deformable solids
Fourier transform of tempered distributions	Definition	Functional analysis
Honeycomb	Definition	Convex and discrete geometry
Goddard problem	Problem	Calculus of variations and optimal control; optimization
Family-wise error rate	Concept	Statistics
Time–frequency analysis	Concept	Harmonic analysis on Euclidean spaces
Algebraic dimension	Definition	Several complex variables and analytic spaces
Generalized quadrangle	Concept	Geometry
Relation algebra	Concept	Mathematical logic and foundations
General linear model	Definition	Statistics
Differential graded algebra	Concept	Associative rings and algebras
Circle packing theorem	Theorem	Convex and discrete geometry
Interacting particle system	Concept	Probability theory and stochastic processes
Probit model	Definition	Statistics
Finite element exterior calculus	Definition	Numerical analysis
Spectrum of the Laplace–Beltrami operator	Definition	Global analysis, analysis on manifolds
Affine group	Definition	Geometry
Input-to-state stability	Concept	Systems theory; control
Full and faithful functors	Concept	Category theory; homological algebra
Residual set	Concept	General topology
Atomic lattice	Definition	Order, lattices, ordered algebraic structures
Szász–Mirakyan operator	Concept	Approximations and expansions
(∞,1)-category	Definition	Category theory; homological algebra
Bessel function of the second kind	Concept	Special functions
Morita invariant	Concept	Associative rings and algebras
Weyl–Titchmarsh theory	Definition	Ordinary differential equations
Polygamma function	Definition	Special functions
Initial topology	Definition	General topology
Neumann boundary condition	Concept	Ordinary differential equations
Weyl's criterion	Theorem	Number theory
Adem relations	Theorem	Algebraic topology
Universally measurable set	Concept	Measure and integration
Kernel of an integral equation	Concept	Integral equations
Lusternik–Schnirelmann theory of critical points	Definition	Global analysis, analysis on manifolds
Hyers–Ulam stability	Definition	Difference and functional equations
Moments and orthogonal polynomials	Concept	Integral transforms, operational calculus
Dilworth's theorem	Theorem	Order, lattices, ordered algebraic structures
Gromov–Hausdorff convergence	Concept	Differential geometry
Hyperstructure	Definition	Group theory and generalizations
Polar set	Definition	Potential theory
Universal coefficient theorem	Theorem	Algebraic topology
Linear discriminant analysis	Definition	Statistics
Friedrichs extension	Concept	Operator theory
M/M/1 queue	Example	Probability theory and stochastic processes
Property (T)	Concept	Topological groups, Lie groups
Triangular matrix	Concept	Linear and multilinear algebra; matrix theory
Normal closure	Definition	Field theory and polynomials
Crystallographic group	Definition	Group theory and generalizations
Zeta-regularized determinant	Definition	Global analysis, analysis on manifolds
Submersion	Definition	Manifolds and cell complexes
Line graph	Concept	Combinatorics
Cerf theory	Definition	Manifolds and cell complexes
Free algebra in a variety	Concept	General algebraic systems
Dunkl operator	Concept	Special functions
Conformal geometry	Concept	Differential geometry
Dedekind-finite ring	Concept	Associative rings and algebras
Analytic signal	Concept	Information and communication theory, circuits
Diffusion process	Definition	Probability theory and stochastic processes
Prime ideal in a noncommutative ring	Definition	Associative rings and algebras
Smale's degree for proper Fredholm maps	Concept	Global analysis, analysis on manifolds
Floquet multiplier	Definition	Ordinary differential equations
Several complex variables	Definition	Several complex variables and analytic spaces
Index of a singular integral operator	Concept	Integral equations
Arithmetical variety	Concept	General algebraic systems
Floquet theory	Definition	Ordinary differential equations
Global dimension	Concept	Commutative algebra
Space of convergent sequences	Example	Functional analysis
Bohr's approximation theorem	Theorem	Harmonic analysis on Euclidean spaces
Analysis of variance	Definition	Statistics
Enough projectives	Definition	Category theory; homological algebra
Hironaka's resolution for complex spaces	Theorem	Several complex variables and analytic spaces
Modular form	Concept	Number theory
Club set	Definition	Mathematical logic and foundations
Second main theorem of Nevanlinna theory	Theorem	Functions of a complex variable
Stallings theorem about ends of groups	Theorem	Group theory and generalizations
Singularity theory	Definition	Several complex variables and analytic spaces
de Rham cohomology	Concept	Global analysis, analysis on manifolds
Image of J	Concept	Algebraic topology
Sinai billiard	Example	Dynamical systems and ergodic theory
Closed graph theorem	Theorem	Functional analysis
Obstacle problem	Problem	Partial differential equations
Nullary operation	Definition	General algebraic systems
Bayesian information criterion	Concept	Statistics
Cyclic algebra	Definition	Associative rings and algebras
Integration in the transform variable	Proposition	Integral transforms, operational calculus
Klein quartic	Object	Algebraic geometry
Unramified morphism of rings	Concept	Commutative algebra
Quantum dilogarithm	Definition	Special functions
De Bruijn sequence	Object	Computer science
Virtually Haken conjecture	Theorem	Manifolds and cell complexes
Conformal radius	Concept	Functions of a complex variable
Broyden's method	Theorem	Numerical analysis
Krohn–Rhodes theory	Definition	Group theory and generalizations
Pseudo-Anosov map	Concept	Dynamical systems and ergodic theory
Quasi-Frobenius ring	Definition	Associative rings and algebras
Rational surface	Definition	Algebraic geometry
Almost periodic function	Concept	Abstract harmonic analysis
Inverse problem	Definition	Partial differential equations
Cheeger constant	Definition	Combinatorics
Lusin's theorem	Theorem	Measure and integration
Knot invariant	Definition	Manifolds and cell complexes
Knot invariant	Concept	Manifolds and cell complexes
Sobolev embedding theorem	Theorem	Functional analysis
Bergman space	Definition	Functions of a complex variable
Sinc function	Definition	Special functions
Arithmetic genus	Concept	Algebraic geometry
Faltings's theorem	Theorem	Number theory
Determinate moment problem	Concept	Integral transforms, operational calculus
Exponential integrator	Proposition	Numerical analysis
Conditioned Brownian motion	Concept	Probability theory and stochastic processes
Partially well-ordered set	Concept	Order, lattices, ordered algebraic structures
Steenrod square	Definition	Algebraic topology
Paratopological group	Concept	Topological groups, Lie groups
Painlevé transcendents	Definition	Special functions
Remez algorithm	Concept	Numerical analysis
Width of a poset	Definition	Order, lattices, ordered algebraic structures
Spread	Concept	Geometry
Focal subgroup theorem	Theorem	Group theory and generalizations
Jacobian criterion	Theorem	Commutative algebra
Viscosity solution	Concept	Partial differential equations
Liouville–Neumann series	Theorem	Integral equations
Quermassintegral	Concept	Convex and discrete geometry
Analytic function between Banach spaces	Concept	Functional analysis
Character of an abelian group	Concept	Abstract harmonic analysis
Convergence of an infinite product	Definition	Sequences, series, summability
Integrally closed domain	Concept	Commutative algebra
Functional square root	Definition	Difference and functional equations
Generalized cohomology theory	Concept	Algebraic topology
Painlevé property	Definition	Ordinary differential equations
Geometric Brownian motion	Definition	Probability theory and stochastic processes