Every idea

Ideas 7351–7500 of 7806.

Name	Kind	Subject
Proximity space	Concept	General topology
Group representation	Concept	Group theory and generalizations
Vitali set	Counterexample	Measure and integration
Majorization	Definition	Real functions
Lorenz system	Example	Ordinary differential equations
Minkowski–Bouligand dimension	Concept	Measure and integration
Girth	Definition	Combinatorics
Cauchy filter	Concept	General topology
Lie symmetry method	Definition	Ordinary differential equations
Cut locus	Definition	Differential geometry
Resolvent set	Concept	Operator theory
Borel conjecture	Conjecture	Manifolds and cell complexes
Matrix multiplication exponent	Problem	Computer science
Convergence along an ultrafilter	Definition	General topology
Error-correcting code	Definition	Information and communication theory, circuits
Knot Floer homology	Definition	Manifolds and cell complexes
Symplectic group	Object	Group theory and generalizations
Computability theory	Concept	Mathematical logic and foundations
Large cardinal	Concept	Mathematical logic and foundations
Schreier coset graph	Definition	Group theory and generalizations
Analytic capacity	Definition	Functions of a complex variable
Formally real field	Concept	Field theory and polynomials
Lie symmetry method	Concept	Ordinary differential equations
Hearing the shape of a drum	Problem	Global analysis, analysis on manifolds
Exotic R4	Object	Manifolds and cell complexes
Center manifold	Concept	Ordinary differential equations
Quadratic variation	Concept	Probability theory and stochastic processes
Mittag-Leffler's theorem	Theorem	Functions of a complex variable
Compositum of fields	Definition	Field theory and polynomials
Rees matrix semigroup	Concept	Group theory and generalizations
Algorithmic randomness	Definition	Mathematical logic and foundations
Nörlund mean	Concept	Sequences, series, summability
Cut locus	Concept	Differential geometry
Abel–Dini theorem	Theorem	Sequences, series, summability
Differentiable curve	Definition	Differential geometry
Finite ring	Concept	Associative rings and algebras
Localization at a prime ideal	Concept	Commutative algebra
Rough path	Concept	Probability theory and stochastic processes
Upper half-plane	Object	Functions of a complex variable
Inner-outer factorization	Theorem	Functions of a complex variable
Spectral theorem for bounded normal operators	Theorem	Operator theory
Rack and quandle	Concept	Manifolds and cell complexes
Integrable function	Concept	Measure and integration
Artin's theorem on fixed fields	Theorem	Field theory and polynomials
Bondy's theorem	Theorem	Combinatorics
Marsden–Weinstein reduction	Definition	Differential geometry
Summability method	Definition	Sequences, series, summability
Chern–Simons form	Concept	Differential geometry
Integral element	Definition	Commutative algebra
Stinespring dilation theorem	Theorem	Functional analysis
Hilbert's tenth problem	Theorem	Number theory
Chebotarev's density theorem	Theorem	Number theory
Permanent	Concept	Linear and multilinear algebra; matrix theory
Hecke operator	Definition	Number theory
Sub-Gaussian distribution	Concept	Probability theory and stochastic processes
Laguerre–Pólya class	Concept	Functions of a complex variable
F. and M. Riesz theorem	Theorem	Functions of a complex variable
Gödel's incompleteness theorems	Theorem	Mathematical logic and foundations
Weyl's theorem on compact perturbations	Theorem	Operator theory
Jacobson radical	Concept	Commutative algebra
Khovanov homology	Concept	Manifolds and cell complexes
CAT(0) group	Concept	Group theory and generalizations
Schnirelmann density	Definition	Number theory
Lindelöf's theorem	Theorem	Functions of a complex variable
J-homomorphism	Definition	Algebraic topology
Associated graded ring	Definition	Commutative algebra
Local martingale	Concept	Probability theory and stochastic processes
Kovacic's algorithm	Concept	Ordinary differential equations
Nuclear space	Concept	Functional analysis
A subgroup of order two in S3 is not normal	Example	Group theory and generalizations
Fubini's theorem on differentiation	Theorem	Real functions
Metric outer measure	Definition	Measure and integration
Branch point	Definition	Functions of a complex variable
Square root of a positive operator	Definition	Operator theory
Nagata ring	Definition	Commutative algebra
Section of a vector bundle	Definition	Algebraic topology
Lebesgue–Stieltjes measure	Definition	Measure and integration
Square root of a matrix	Definition	Linear and multilinear algebra; matrix theory
Siegel–Walfisz theorem	Theorem	Number theory
F-sigma set	Definition	General topology
Leech lattice	Object	Number theory
Naive set theory	Concept	Mathematical logic and foundations
Regular semigroup	Concept	Group theory and generalizations
Colombeau algebra	Concept	Functional analysis
Analytic combinatorics	Definition	Combinatorics
Elliptic cohomology	Concept	Algebraic topology
Train track	Concept	Manifolds and cell complexes
Geometric realization	Definition	Algebraic topology
Skorokhod's embedding theorem	Theorem	Probability theory and stochastic processes
Interacting particle system	Definition	Probability theory and stochastic processes
Eilenberg–MacLane spectrum	Object	Algebraic topology
Frobenius's theorem on Frobenius kernels	Theorem	Group theory and generalizations
Exchangeable random variables	Definition	Probability theory and stochastic processes
Function field	Concept	Field theory and polynomials
Empirical process	Concept	Probability theory and stochastic processes
Cohomological dimension of a field	Definition	Field theory and polynomials
Prime end	Definition	Functions of a complex variable
Grunsky matrix	Concept	Functions of a complex variable
Equidistribution modulo one	Concept	Number theory
Hilbert's theorem on the hyperbolic plane	Theorem	Differential geometry
AKS primality test	Theorem	Number theory
Associated bundle	Definition	Algebraic topology
Triangle removal lemma	Lemma	Combinatorics
Bounded gaps between primes	Theorem	Number theory
Sumset	Concept	Number theory
Factorization of polynomials over finite fields	Concept	Number theory
Hemicontinuity	Concept	General topology
Dehn twist	Definition	Manifolds and cell complexes
Branch point	Concept	Functions of a complex variable
Nuclear operator	Concept	Operator theory
Nesbitt's inequality	Proposition	Real functions
Contraction semigroup	Concept	Operator theory
Intuitionism	Concept	Mathematical logic and foundations
Goodstein's theorem	Theorem	Mathematical logic and foundations
Finiteness of associated primes	Theorem	Commutative algebra
Graph reconstruction conjecture	Conjecture	Combinatorics
Separable degree	Definition	Field theory and polynomials
Shilov boundary	Definition	Functional analysis
Amalgamation property	Concept	Mathematical logic and foundations
System of parameters	Definition	Commutative algebra
Dirichlet process	Concept	Probability theory and stochastic processes
Jordan–Schur theorem	Theorem	Group theory and generalizations
Homology with coefficients	Concept	Algebraic topology
Weyl–Titchmarsh theory	Concept	Ordinary differential equations
Lebesgue integral	Definition	Measure and integration
Kruskal's tree theorem	Theorem	Combinatorics
Cardinal function	Concept	General topology
Disk algebra	Definition	Functional analysis
Schramm–Loewner evolution	Definition	Probability theory and stochastic processes
Burnside problem	Problem	Group theory and generalizations
Numerical range	Concept	Operator theory
Factorization of polynomials over finite fields	Definition	Number theory
Spectrum of an operator	Definition	Operator theory
Knot concordance	Definition	Manifolds and cell complexes
Elliptic operator	Concept	Operator theory
Umbilical point	Concept	Differential geometry
Sequence space	Concept	Functional analysis
List of small groups	Example	Group theory and generalizations
Generalized mean inequality	Theorem	Real functions
Toric ideal	Concept	Commutative algebra
Erdős–Stone theorem	Theorem	Combinatorics
Homotopy equivalence	Concept	Algebraic topology
Kummer theory	Concept	Number theory
Tight closure	Definition	Commutative algebra
Primitive recursive function	Definition	Mathematical logic and foundations
Hardy space	Definition	Functions of a complex variable
Finite-dimensional distributions	Concept	Probability theory and stochastic processes
Tannery's theorem	Theorem	Sequences, series, summability
Connected sum	Concept	Manifolds and cell complexes
Toric ideal	Definition	Commutative algebra